RX3 Lubrication System: Checking the Engine Oil Level

[SpudRider]

The lubrication system of the NC250 (ZS177MM) engine in the Zongshen RX3 is designed similarly to the lubrication system of my Honda XR650L. Both systems use a dual chamber oil pump, which has an elevated oil reservoir. The Honda stores much of its engine oil in a reservoir located at the top of the bike's frame, behind the triple tree. The Zongshen stores much of its engine oil in a 'gearbox' reservoir, located behind the bike's clutch cover. The Honda has an oil dipstick located at the elevated reservoir, and the Zongshen has an sight glass located at the elevated reservoir. The level of oil in the elevated reservoir is not constant for either motorcycle, so both bikes require you to follow a specific procedure to make sure you measure the oil level properly. ;)

In this thread I will first describe the design of the Honda lubrication system, then I will describe the similar design of the Zongshen lubrication system. Finally, I will describe the proper method to check the oil level, which is almost identical for both bikes, since the lubrication systems are designed so similarly. ;)

[pete]

The RX3 is a wet sump motor & the XR650 is a dry sump motor ?






..

[SpudRider]

I will describe the Honda lubrication system first, since I have a detailed diagrams of that system, and that system is thoroughly described in Honda literature. ;) Once we understand the Honda lubrication system, we can better understand the Zongshen lubrication system.

Let's describe the Honda lubrication system starting at the oil sump, which is the lowest part of the engine where all the oil drains after it has lubricated the upper parts of the engine. Here is a drawing which shows how the 2-chamber oil pump lubricates the Honda engine, and stores much of the oil in an elevated reservoir.

http://img.photobucket.com/albums/v521/65ShelbyClone/Public/Motorcycle%20Stuff/f573bb82.gif

The first chamber of the oil pump draws oil from the oil sump, and delivers the oil to two locations. One line sends oil to the transmission, which then drains back to the oil sump. The other line sends oil to the upper oil reservoir.

The upper oil reservoir then delivers oil by gravity feed to the second chamber of the oil pump. The second chamber of the oil pump delivers oil to the oil filter. After the oil is filtered, the oil is separated into two lines. One oil line lubricates the crankshaft, connecting rod, and piston. The other oil line sends oil to the cylinder head to lubricate the camshaft, rocker arms, and valve tappets. After lubricating the top of the engine, all this oil drains to the oil sump, where the entire cycle begins again. ;)

http://i442.photobucket.com/albums/qq146/spudrider/Zongshen%20RX3/Honda%20XR650L%20Lubrication%20System_zpsncph5tws. jpg (http://s442.photobucket.com/user/spudrider/media/Zongshen%20RX3/Honda%20XR650L%20Lubrication%20System_zpsncph5tws. jpg.html)

[SpudRider]

The Zongshen lubrication system is described in the CSC blog at the following link.

http://californiascooterco.com/blog/?p=17257

http://californiascooterco.com/blog/wp-content/uploads/2015/07/LubeSystem.jpg

As described in the CSC blog, the Zongshen oil system has two oil reservoirs. As with the Honda system, the lower 'reservoir' is the oil sump, or crankcase, where all the oil collects after lubricating the top end of the engine. The upper reservoir is the 'gearbox,' which contains the sight glass, and is located behind the clutch cover.

I don't have a detailed description of the Zongshen system, but I surmise it operates in a manner similar to the Honda system. The NC250 (ZS177MM) engine has two oil pumps. One oil pump probably collects oil from the oil sump. It then delivers oil to lubricate the transmission, and also stores oil in the upper reservoir, which is labeled the 'gearbox.' This upper reservoir, and the sight glass, are located high above the oil drain plug, which is near the oil sump at the bottom of the engine. ;)

From the elevated, 'gearbox' reservoir, oil is probably fed by gravity to the second oil pump, which delivers oil to the oil filter. From the oil filter the oil probably follows two oil lines. One oil line lubricates the crankshaft, connecting rod, and piston. The other oil line goes to the cylinder head to lubricate the camshaft, rocker arms, and tappets. All of this oil then drains to the oil sump, and the process is repeated.

[SpudRider]

Because the upper oil reservoirs in both systems are fed by the first chamber of the oil pump, the oil level in these reservoirs changes under different operating conditions. Therefore, you must follow a specific procedure to properly determine the actual oil level in the reservoir. The proper procedure is described exactly the same for both the Honda and Zongshen engines.

The Honda manuals tell you to check the oil level when the engine is warm, after it has reached operating temperature. Let the bike idle for a minute or two on the kick stand, in an upright position. Then turn off the engine, and wait a minute or two for the oil to drain. Finally, balance the bike in a vertical position, and measure the oil level on the dipstick.

The CSC blog tells you to check the oil level in the following words.

Allow the engine to come up to operating temperature.
Close the throttle and allow the engine to operate at idle for one minute.
Close the ignition and wait for one minute.
Hold the motorcycle in the vertical position (i.e., off the sidestand) and observe the engine oil level in the viewport. If the engine has the right amount of oil, the level will be between the upper and lower scribe lines, as shown in the photo below.

http://californiascooterco.com/blog/wp-content/uploads/2015/07/140701_4721-650.jpg

[SpudRider]

If you don't follow the proper procedure with either the Honda XR650L, or the Zongshen RX3, you will probably overfill the engine with motor oil. The RX3 will blow the excess oil out the crankcase vent, and the excess oil will collect in the tube below the oil separator, as described in the following thread. ;)

http://www.chinariders.net/showthread.php?p=188883#post188883

http://californiascooterco.com/blog/wp-content/uploads/2015/07/140701_4723-650.jpg

[SpudRider]

I usually check the oil level in both my RX3 and XR650L after I finish a ride. I also will sometimes check the oil level during a ride, when I stop to fill the fuel tank. In both cases, the engine has reached operating temperature. ;) After letting the engine idle for several minutes on the kick stand, I stop the engine. Then I balance the bike in the vertical position, and check the oil level.

If I check the oil at a gas station, I let the bike idle on the kick stand for a minute or two beside the pump. Then I turn off the engine, and pump the fuel while the oil settles. After pumping the fuel, I balance the bike in the vertical position, and check the oil level. :)

If you fill the RX3 with the specified, 1.7 quarts of motor oil at each oil change, you will have the proper amount of oil in the crankcase. You can verify the engine is not burning oil, or leaking oil, by checking the oil level in the manner described above. :)

http://www.cscmotorcycles.com/Articles.asp?ID=266

[SpudRider]

The RX3 is a wet sump motor & the XR650 is a dry sump motor ?

..

Based upon the information provided by CSC, and the Zongshen engineers, the Zongshen engine has two oil reservoirs, and the upper reservoir contains the oil measuring device. As you can see in the photographs below, the oil sight glass is located very high above the oil sump, oil drain plug, both oil screens, and the oil filter. ;) Also, you must check the oil level using the same procedure as you do for the Honda motorcycle. Therefore, I must conclude the two lubrication systems are similar in many ways. ;)

http://www.cscmotorcycles.com/v/vspfiles/assets/images/oil_change_image_%20(11).jpg

http://www.cscmotorcycles.com/v/vspfiles/assets/images/oil_change_image_%20(1).jpg

http://www.cscmotorcycles.com/v/vspfiles/assets/images/oil_change_image_%20(3).jpg

[SpudRider]

Also, it's nice to note the NC250 engine holds 1.7 quarts of motor oil, which is almost the same amount of motor oil (2.06 quarts) as contained in the much larger, 650cc engine of the Honda XR650L. :)

[pete]

Also, it's nice to note the NC250 engine holds 1.7 quarts of motor oil, which is almost the same amount of motor oil (2.06 quarts) as contained in the much larger, 650cc engine of the Honda XR650L. :)

same amount of oil as my XT660R... like the XR the oil
is in a tank for a time away from the heat sorce "motor"



.

[SpudRider]

Yes, the Honda, 'dry sump' lubrication system is a very nice design. :) The NC250 engine is water cooled, so an external oil reservoir is not necessary with the Zongshen engine.

I must say, I am very impressed with the nice condition of the used motor oil I empty from the NC250 engine. :)

[Weldangrind]

Excellent thread idea, Spud. You're an awesome Zong ambassador.

That's the same process I had to follow with my old '96 XR250R. A bit of a pain, but well worth the effort.

The intricate design of the oiling system helps to remind one of the importance of regular oil changes.

[SpudRider]

Thank you, Weld. :) I am impressed with the large oil volume for this 250cc engine. I change the oil every time the odometer records another 2,000 miles, which is the same schedule I keep for my Honda XR650L.

[SpudRider]

Today I reached 6,000 miles on the odometer, and changed the engine oil. I change the oil every time the odometer turns an additional 2,000 miles. ;)

Since I switched to a reusable, stainless steel, oil filter, my RX3 now takes 1.8 quarts of motor oil, which is 1 quart plus 26 ounces.

[pete]

my RX3 now takes 1.8 quarts of motor oil, which is 1 quart plus 26 ounces.


Whats are these quarts & ounces things you talk of ???





..

[SpudRider]

Whats are these quarts & ounces things you talk of ???

..

:lmao:

I studied engineering in college, so I developed a preference for the metric system forty years ago. ;) I wish the United States had switched to the metric system in the 1970s, when Canada made the switch, but noooooooo. >:(

[humanbeing]

Whats are these quarts & ounces things you talk of ...
https://en.wikipedia.org/wiki/Gallon#The_US_liquid_gallon
:... developed a preference for the metric system forty years ago. ;) I wish the United States had switched to the metric system ...
Not as crazy http://en.wikipedia.org/wiki/Hong_Kong_units_of_measurement as where i grown up

[Weldangrind]

Try growing up in Canada. Back in the day, we used the Imperial system, we were inundated with the US system and we were in the process of switching to Metric.

[SpudRider]

Try growing up in Canada. Back in the day, we used the Imperial system, we were inundated with the US system and we were in the process of switching to Metric.

Yes, but now your are measurement trilingual. :)

:lol:

[ronoverdrive]

Just curious here, but SpudRider seems to follow CSC's recommend 2000 miles between oil changes. CSC recommends Mobil 4T Synthetic after the first 1000 miles and its my understanding that synthetic oils are suppose to last longer then mineral oils so does 2000 miles seem a bit excessive? What's Zengshon say on mileage because I don't see it in the PDF of the manual that's floating around?

[SpudRider]

Just curious here, but SpudRider seems to follow CSC's recommend 2000 miles between oil changes. CSC recommends Mobil 4T Synthetic after the first 1000 miles and its my understanding that synthetic oils are suppose to last longer then mineral oils so does 2000 miles seem a bit excessive? What's Zengshon say on mileage because I don't see it in the PDF of the manual that's floating around?

Page 51 of the Owner's Manual specifies changing the engine oil every 2,500 miles. It also states to avoid synthetic motor oils for the first 1,000 miles. Afterward, you may choose to switch to synthetic motor oils, if you wish. ;)

I change the engine oil every time the odometer turns 2,000 miles. This is the easiest way for me to remember to change the motor oil. I follow the same schedule for my Honda XR650L, but it has an air cooled engine. ;)

The used motor oil from my RX3 always appears to be in very nice condition. :) The fans and radiators on the RX3 do a very good job keeping the engine from overheating. :tup:

I guess I am performing one extra oil change every 10,000 miles, but it is much easier for me to remember to change the oil every time the odometer records an even number of thousand miles. ;)

I use Mobil, Delvac, 15W/40 motor oil in all my motorcycles. It does an excellent job, and I don't see the need switch to synthetic motor oils. ;) You might enjoy reading the following articles on motor oil. :)

http://api.viglink.com/api/click?format=go&jsonp=vglnk_143762201136110&key=34762fb5761dc247f55c8a8e247c5fb4&libId=icfn0tzy0100j7ij000DA53u5pev2&loc=http%3A%2F%2Fwww.chinariders.net%2Fshowthread. php%3Ft%3D14228&v=1&out=http%3A%2F%2Fwww.calsci.com%2Fmotorcycleinfo%2 FOils1.html&ref=http%3A%2F%2Fwww.chinariders.net%2Fforumdispla y.php%3Ff%3D136&title=Zongshen%20RX3%20(ZS250GY-3)%20Modifications%20%26%20Maintenance%20-%20ChinaRiders%20Forums&txt=CalSci%20Motorcycle%20Oil%20Essay

http://api.viglink.com/api/click?format=go&jsonp=vglnk_143762203328411&key=34762fb5761dc247f55c8a8e247c5fb4&libId=icfn0tzy0100j7ij000DA53u5pev2&loc=http%3A%2F%2Fwww.chinariders.net%2Fshowthread. php%3Ft%3D14228&v=1&out=http%3A%2F%2Fwww.calsci.com%2Fmotorcycleinfo%2 FConsumables.html&ref=http%3A%2F%2Fwww.chinariders.net%2Fforumdispla y.php%3Ff%3D136&title=Zongshen%20RX3%20(ZS250GY-3)%20Modifications%20%26%20Maintenance%20-%20ChinaRiders%20Forums&txt=CalSci%20Recommended%20Motorcycle%20Oils

[NoVa Rider]

I just completed 1,000 miles on my RX3 and switched to Mobile 1 motorcycle 10W-40. I use synthetic in all my bikes, not so much for longevity, but because the machines run noticeably smoother, and the increase in gas mileage more than offsets the cost of the oil. Now that I am running syn in the RX3, it's much much easier to find neutral. The bike runs quieter. I'm packing this morning for my first multi-day camping trip out to West Virginia and we'll see how the mileage turns out.

[NoVa Rider]

Get a mechanic's inspection mirror -- one of the little round ones on a telescoping wand. I carry mine in the right saddlebag. Easy to check oil level while sitting on the bike.

[SpudRider]

I just completed 1,000 miles on my RX3 and switched to Mobile 1 motorcycle 10W-40. I use synthetic in all my bikes, not so much for longevity, but because the machines run noticeably smoother, and the increase in gas mileage more than offsets the cost of the oil. Now that I am running syn in the RX3, it's much much easier to find neutral. The bike runs quieter. I'm packing this morning for my first multi-day camping trip out to West Virginia and we'll see how the mileage turns out.

When you get back, please do post a thread in our Ride Reports Forum, and let us know your gas mileage. :)

[detours]

Get a mechanic's inspection mirror -- one of the little round ones on a telescoping wand. I carry mine in the right saddlebag. Easy to check oil level while sitting on the bike.

I do the same ... easy peasy!

[MattyBoy1976]

Sorry to resurrect an old thread, and I think I saw this discussed somewhere else and can't find it, but what is the actual oil capacity of the RX3?

The CSC manual that came with the bike states alternately that the oil capacity is 1.7 quarts or 1.7 liters (apparently a proofreading problem), but then parenthetically states that both are 55.4 ounces. However, 1.7 US quarts is 54.4 fluid ounces, and 1.7 liters is 57.5 fluid ounces. Anybody know for sure which is correct? While I know that 2-3 ounces is not a huge deal in the grand scheme of things, I want to make sure I get it right!

[SpudRider]

The correct oil capacity is 1.7 quarts, or 54.4 fluid ounces. ;)

I fill the crankcase with one quart of motor oil; then I add another 22 ounces. Every time I check the oil level in the sight glass, it is correct. However, you need to use the correct method for checking the oil level in a dry sump engine. ;)

[MattyBoy1976]

The correct oil capacity is 1.7 quarts, or 54.4 fluid ounces. ;)

I fill the crankcase with one quart of motor oil; then I add another 22 ounces. Every time I check the oil level in the sight glass, it is correct. However, you need to use the correct method for checking the oil level in a dry sump engine. ;)

Thank you!

[Co2]

:tup::tup::tup:Every time I check the oil level in the sight glass,:tup::tup::tup: it is correct. However, you need to use the correct method for checking the oil level in a dry sump engine. ;)


Oil pump and autopsie Nc250 / ZS177MM , (tomorow probably.. , mounted new bearings, and gear system 6.gear. ended im rported here new topic.)
















Maybe to give an idea:tup:

[Jay In Milpitas]

Thank You Co2 for sharing those. It helps to visualize the system.
I'm also impressed with the quality of the casting and machine work by Zongshen. One more *Chinese* myth set to rest.

[SpudRider]

Indeed, thanks for sharing the excellent photographs. :tup: If you have more photos, please do post them. :)

I'm not surprised by the quality of manufacture. The engine in my Zongshen ZS200GY-2 is built to similarly high standards. :tup:

[SpudRider]

Looking at the photos, It appears the NC177MM engine has two oil pumps. It seems an oil pump is located on both the left, and right halves of the crankcase. Is this correct? If so, what mechanism drives the oil pump under the stator cover on the left side of the engine?

[SpudRider]

Looking at the photograph below, it is obvious the oil pump on the right half of the crankcase is driven by two plastic gears which mesh with the gear on the rear of the clutch basket.

http://www.mychinamoto.com/forums/attachment.php?attachmentid=16649&d=1417862107

Does the oil pump shaft, part #9, inside a right oil pump, transmit power to another oil pump on the left crankcase cover?

http://i442.photobucket.com/albums/qq146/spudrider/Zongshen%20RX3/RX3%20Oil%20Pump%20Parts%20Diagram_zpsvxou0lzq.jpg (http://s442.photobucket.com/user/spudrider/media/Zongshen%20RX3/RX3%20Oil%20Pump%20Parts%20Diagram_zpsvxou0lzq.jpg .html)

[Co2]

Np , :)

Crossfire and my bike same, nice shoot spudrider.

Yes 1 shaft, double pump unite , (or i think that :) )

Left side is just closed a plate , bottom of alternator/stator/volant.

power source is clutch basket , bottom second gear, and double plastic gear (or i think that :) )

[Co2]

No : 9 shaft , 3x pin, 3x pin bed 1x left 1x right , 1x powersorce of plastic gear.

[katflap]

Great photos Co2, :tup:

Has got me thinking about the possibility of fitting a kick start :)

[Co2]

Great photos Co2, :tup:

Has got me thinking about the possibility of fitting a kick start :)

Photo is my electric+kickstarter version model zs177mm 5.gears, same to crossfire xz250rr dirt/sm version , but offcourse why not, just need dimensions...of Rx3 case. , im buy Rx3 gear system all, and parts 100% compatible:tup:

[SpudRider]

Np , :)

Crossfire and my bike same, nice shoot spudrider.

Yes 1 shaft, double pump unite , (or i think that :) )

Left side is just closed a plate , bottom of alternator/stator/volant.

power source is clutch basket , bottom second gear, and double plastic gear (or i think that :) )



Thank you for confirming my assessment, and thanks for posting more of the excellent engine photographs. :) Please do post more photos, we are learning a lot from them. :tup:

[SpudRider]

Great photos Co2, :tup:

Has got me thinking about the possibility of fitting a kick start :)

Yes, you certainly can install a kick starter. You merely need to obtain the kick starter parts, and a new right crankcase cover. The parts will easily install. The only question is whether the RX3 frame, engine placement, foot peg position, et cetera, will allow enough space for someone to operate the kick starter. ;)

[SpudRider]

There must be a very large bearing supporting the counter shaft as it exits the left half of the crankcase. :tup: The hole is located at the bottom left of the following photograph, which is inverted.

http://i.hizliresim.com/1k90Z1.jpg

[SpudRider]

CO2,

If you have time, please post a photograph of the inside of the stator cover. The crankcase vent exits the front of the stator cover, near the engine counter balancer, and we are interested in examining this area. :)

[Co2]

CO2,

If you have time, please post a photograph of the inside of the stator cover. The crankcase vent exits the front of the stator cover, near the engine counter balancer, and we are interested in examining this area. :)


Ofcourse , just in 10 min.

Crank and other all ZS177MM / NC250 Beraings

6207 LU ( 1 side sealant.) x1

6207 c3px1 (naked non seal) x1

6304 x1

63 / 22 (or 6322 idk writed on bearing that code.) x1

6203 / p63 x2

6004 x2

61805 x2

61902 x2

total 12 bearing , İ changed all new , before i research all bearings NSK/FAG/SKF japan qualited but my little village/town.....>:( , and founded original xmotos parts again my s.. distrubutor....:doh:


Crank bearings is just 1 piece 1 side is selant , and other total all naked bearings, but why jus 1 bearing have sealant , other same size 6207 is naked?? that is engineering think/trick or cheap type idk any idea?

photos comin 10-min...

[SpudRider]

...Crank bearings is just 1 piece 1 side is selant , and other total all naked bearings, but why jus 1 bearing have sealant , other same size 6207 is naked?? that is engineering think/trick or cheap type idk any idea?

photos comin 10-min...

[/B]

Thank you. :)

I'm sure one side of the bearing is sealed to retain oil and/or prevent oil from passing through to an unwanted area. This is not unusual. ;)

[Co2]

Balancer and crank




statör cup











BLUE NYLON , MARKED HOLE'S , İ HOPE HELP U BOSS.

Balance and ststor side.



Balancer side in, bottom of cylinder/piston side, a same to carburator JET , i ask that part my moto master friend sad, sprayed bottom for piston oil idk ,

[SpudRider]

CO2,

While you have the engine apart, I suggest you examine the large spring in the gear shifter. I have read one report of it failing. ;)

http://www.mychinamoto.com/forums/attachment.php?attachmentid=16648&d=1417862084&thumb=1

[SpudRider]

That is a nice, large bearing which supports the counter shaft. :tup: The bearing is located at the upper right of the photograph. ;)

http://i.hizliresim.com/XonOQ3.jpg

[Co2]

CO2,

While you have the engine apart, I suggest you examine the large spring in the gear shifter. I have read one report of it failing. ;)

http://www.mychinamoto.com/forums/attachment.php?attachmentid=16648&d=1417862084&thumb=1


Please tell that is joke, but im buy all parts Rx3 ,

gear shifter

gear chains

gear rod's

gear ball/cylinder (Turkish terminology of moto world sad gear ball , a cylinder gear changer idk)

All parts , i cant without chance all gear systems buy RX3.

Please a joke, coming infactrus my heart attack:cry::cry:

[SpudRider]

I assume the small pin of the engine counter balancer inserts into the hole on the stator cover which leads to the crankcase vent. Am I correct?

http://i.hizliresim.com/oZLBMm.jpg

http://i.hizliresim.com/zVWdNY.jpg

[SpudRider]

Please tell that is joke, but im buy all parts Rx3 ,

gear shifter

gear chains

gear rod's

gear ball/cylinder (Turkish terminology of moto world sad gear ball , a cylinder gear changer idk)

All parts , i cant without chance all gear systems buy RX3.

Please a joke, coming infactrus my heart attack:cry::cry:

No, it's not a joke. Please read post #102 at the following thread.

http://www.mychinamoto.com/forums/showthread.php?6634-Zongshen-RX3-report/page11

However, I think this was an isolated, rare part failure. This large spring is located under the gearshift lever which is installed on the outside of the right crankcase. If you pull the gearshift lever from the crankcase, you can inspect this large spring. If the spring looks defective, replace it now, rather than later. ;)

[SpudRider]

This return spring for the gearshift lever is part #3 in the following diagram. ;)

http://i442.photobucket.com/albums/qq146/spudrider/Zongshen%20RX3/rx3%20gearshift%20parts_zps6jkjxjvy.jpg (http://s442.photobucket.com/user/spudrider/media/Zongshen%20RX3/rx3%20gearshift%20parts_zps6jkjxjvy.jpg.html)

[Co2]

Please help , that parts all is 1vs1 changed RX3 , new parts , if see any spring, and other failure/high risk parts, please warning me

Right wet oiled parts all new 6.gear system , left old 5.gear system parts.

[SpudRider]

Check the parts diagram in post #50, right above your last post. ;)

Part #3 installs around the gearshift lever. Even if you don't have a new spring, merely inspect the old spring. If the old spring looks good, install it. :) Even if it breaks in the future, you don't need to split the crankcase to replace it. ;)

[Co2]

No, it's not a joke. Please read post #102 at the following thread.

http://www.mychinamoto.com/forums/showthread.php?6634-Zongshen-RX3-report/page11

However, I think this was an isolated, rare part failure. This large spring is located under the gearshift lever which is installed on the outside of the right crankcase. If you pull the gearshift lever from the crankcase, you can inspect this large spring. If the spring looks defective, replace it now, rather than later. ;)


Really heart attack missed me :lmao:, ouuuv piuuv , all garphic parts have now im relax, thank you very much for warn.

The diagram all parts i have , now i really relax thanks again, parts photos on #51

[SpudRider]

Really heart attack missed me :lmao:, ouuuv piuuv , all garphic parts have now im relax, thank you very much for warn.

I'm sorry; I wasn't trying to cause a heart attack. :hehe:

[SpudRider]

If you have time, please reply to my question in post #48. ;)

[Co2]

If you have time, please reply to my question in post #48. ;)


Yep u right , balancer rod get stator cover, and ventilation crankcase master the balancer.

Puff out , i blow that balancer:lmao:(for check, for humanism " im hetero..":p) , balancer have ventilation holes.

[SpudRider]

Thank you, sir. :)

Here is my theory. ;) Combustion blow-by gases, and gases evaporating from oil in the crankcase sump exit the crankcase through the hole in the engine balancer shaft. The gases pass through the shaft of the engine balancer, which mates with the crankcase vent which is cast into the stator cover. The engine balancer is supported by bearings in the crankcase. The stator cover is only connected to the engine counter balancer so it can vent crankcase gases through the hollow shaft of the engine counter balancer. ;)

[Jay In Milpitas]

Really heart attack missed me :lmao:, ouuuv piuuv , all garphic parts have now im relax, thank you very much for warn.

The diagram all parts i have , now i really relax thanks again, parts photos on #51

Yes Co2, relax and breathe. So far only one of those springs has been reported broken. I guess Zongshen has made at least 50 or 60 of these engines so 1 spring breaking is not bad.

Blow the balancer? No one here is judging you. ;)
Not knowing the orientation of the passages in the balance weight in relation to the crank pin, I guess the breathing is timed, just like in the old Indian and H-D motors. Also, the holes spinning will expel liquid while letting vapors pass. VERY well thought out system. Wow!

Really enjoying what you are sharing, Co2!:clap:

[SpudRider]

...the holes spinning will expel liquid while letting vapors pass. VERY well thought out system. Wow!

Really enjoying what you are sharing, Co2!:clap:

Indeed, no liquid is going to enter the crankase vent; only hot vapors are allowed to exit the crankase. The ZS177MM engine is elegantly designed, and superbly manufactured. :tup:

[SpudRider]

Examining the excellent photographs provided by CO2, I think we can start to understand better the lubrication system of the ZS177MM engine. Once again, thanks for posting the excellent photos, CO2. :tup:

Clean engine oil is drawn from the oil filter by the left oil pump. Engine oil is also scavanged from the crankcase sump by this oil pump, after the oil is sucked through the oil screen located in front of the oil filter. The crankcase sump is drained by the oil screen plug located in front of the oil filter.

http://i.hizliresim.com/ZVrRz0.jpg

The left oil pump sends some of this oil to the gearbox side of the engine, as shown in the following diagram. Oil journals in the left crankcase lubricate the transmission, and the oil later drips into the gearbox sump.

http://californiascooterco.com/blog/wp-content/uploads/2015/07/LubeSystem.jpg

It appears some of this oil is also sent via an oil journal in the left crankcase to the jet which sprays the piston. This oil journal then seems to continue through the cylinder to the cylinder head, where it lubricates the top end of the engine.

CO2,

Can you post more photographs of the top of the left side of the crankcase, near the oil jet? Also, can you see if an oil journal is located in the cylinder wall at this area? Thank you. :)

[SpudRider]

The gearbox contains the main oil reservoir, and the oil sight glass. The gearbox is drained by the magnetic drain plug located underneath the engine.

Oil is scavanged from the bottom of the gearbox by the right oil pump, after the oil is sucked through the oil screen located behind the oil filter.

http://i.hizliresim.com/lyoRNl.jpg

The right oil pump then sends oil to the oil filter. Another oil journal lubricates the right side of the transmission. I strongly suspect an additional oil journal connects from the right crankcase to the right crankcase cover. This oil journal should feed oil through the crankshaft to lubricate the lower end of the connecting rod, et cetera.

http://i.hizliresim.com/zVWdNY.jpg

http://www.mychinamoto.com/forums/attachment.php?attachmentid=16650&d=1417862130

CO2,

If you have time, please post several photographs of the inside of the right crankcase cover. Once again, thanks for posting all the great photos. :tup:

[SpudRider]

The oil filter contains a pressure valve. If the oil filter is clogged, excess oil pressure will open the valve, and allow oil to bypass the oil filter.

The right oil pump also appears to contain a pressure release valve.

http://i.hizliresim.com/2kM4o0.jpg

http://i.hizliresim.com/3aX5D9.jpg

[SpudRider]

Ofcourse , just in 10 min.

Crank and other all ZS177MM / NC250 Beraings

6207 LU ( 1 side sealant.) x1

6207 c3px1 (naked non seal) x1

6304 x1

63 / 22 (or 6322 idk writed on bearing that code.) x1

6203 / p63 x2

6004 x2

61805 x2

61902 x2

total 12 bearing , İ changed all new , before i research all bearings NSK/FAG/SKF japan qualited but my little village/town.....>:( , and founded original xmotos parts again my s.. distrubutor....:doh:


Crank bearings is just 1 piece 1 side is selant , and other total all naked bearings, but why jus 1 bearing have sealant , other same size 6207 is naked?? that is engineering think/trick or cheap type idk any idea?

photos comin 10-min...



Thanks for posting all the bearing information, CO2. :tup:

[SpudRider]

CO2,

Must you remove the flywheel before you can replace the stator? Where does the stator attach to the engine?

[Co2]

CO2,

Must you remove the flywheel before you can replace the stator? Where does the stator attach to the engine?

Stator position.



Right crankcase



Right crankcase



Steel oil filter (best, i think better than paper filter. 2 years than, 16.000 kilometer same filter.)



Sttel filter in, spring valf.



Oil pump , valf



Oiljet



Oiljet Cylinder contact channel (small)

[SpudRider]

Thanks for posting all the great photos. :) Can you please post a photograph of the inside of the right crankcase cover?

[SpudRider]

I'm very pleased to know the stator mounts inside the stator cover. :tup: I did not see the mounting holes in the previous photo. ;)

http://i.hizliresim.com/a0JqGQ.jpg

http://i.hizliresim.com/zVWdNY.jpg

[Co2]

Thanks for posting all the great photos. :) Can you please post a photograph of the inside of the right crankcase cover?
http://i.hizliresim.com/3PB8nO.jpg

[SpudRider]

Thank you. :tup: I see the oil journal which feeds oil to the end of the crankshaft. :D

[SpudRider]

I agree; I think the reusable, steel oil filters are best. I own three of them. :tup:

http://i.hizliresim.com/V65pMZ.jpg

[SpudRider]

As small as it appears, that hole must be the oil journal which lubricates the cylinder head. ;) You are very helpful, and we appreciate your excellent photos. :)

http://i.hizliresim.com/V65p9B.jpg

http://i.hizliresim.com/EpnlRZ.jpg

[Co2]

Yes Co2, relax and breathe. So far only one of those springs has been reported broken. I guess Zongshen has made at least 50 or 60 of these engines so 1 spring breaking is not bad.

Blow the balancer? No one here is judging you. ;)
Not knowing the orientation of the passages in the balance weight in relation to the crank pin, I guess the breathing is timed, just like in the old Indian and H-D motors. Also, the holes spinning will expel liquid while letting vapors pass. VERY well thought out system. Wow!

Really enjoying what you are sharing, Co2!:clap:
Your welcome Jay / SpudRider , together solving problems/troubleshooting wonder/assistance/share , forum power , tried , i need cold beer now:hi:

[SpudRider]

If I were in Turkey, I would buy you that cold beer. :tup: