New Zongshen RX3 (ZS250GY-3) Dual Sport

[katflap]

Originally Posted by SpudRider

Kat,

Please excuse me, but I've got to ask. What method are you using to check the oil level?

I have been using the "CSC" method since it was posted on their blog.

During these warmer months my oil level has been close to stable. I have only once had to drain off some oil to maintain the correct level.

During this warmer period I have had a good build up of water/fuel in the separator tube where as the winter/spring months, when i got my bike, there was next to nothing.

My probably dodgey theory is that if its not in the tube then it must still be in the crankcase.

Admittedly when i got my bike the "CSC" method of oil checking wasn't known. So maybe all will be ok this winter.

[SpudRider]

Originally Posted by katflap

I have been using the "CSC" method since it was posted on their blog.

During these warmer months my oil level has been close to stable. I have only once had to drain off some oil to maintain the correct level.

During this warmer period I have had a good build up of water/fuel in the separator tube where as the winter/spring months, when i got my bike, there was next to nothing.

My probably dodgey theory is that if its not in the tube then it must still be in the crankcase.

Admittedly when i got my bike the "CSC" method of oil checking wasn't known. So maybe all will be ok this winter.

If I understand the engineer's explanation, a cold engine will allow more fuel to seep past the piston rings. The only other way to get fuel into the crankcase is by piston blow-by.

Indeed, it will be interesting to see what happens this winter. Elevation, humidty, temperature, engine rpms, et cetera, are other factors which can affect piston blow-by and fuel seeping past the piston rings.

[mouradjan]

Hi everyone ,i need help .I changed my RX3's rear rim to 17 inch.Because there is no dual purpose tire for 15 inch rim.And i dont wanna buy a cst brand tire .Now i am using a Kenda 761 130/80-17 but my rear monoshock doesn't give any comfort anymore.Bike is not an enduro anymore it is like a street oriented bike.Becase with this tyre bike became more then 3, 5 cm taller at the rear .Now i need your advice , what should i do?

[SpudRider]

Originally Posted by mouradjan

Hi everyone ,i need help .I changed my RX3's rear rim to 17 inch.Because there is no dual purpose tire for 15 inch rim.And i dont wanna buy a cst brand tire .Now i am using a Kenda 761 130/80-17 but my rear monoshock doesn't give any comfort anymore.Bike is not an enduro anymore it is like a street oriented bike.Becase with this tyre bike became more then 3, 5 cm taller at the rear .Now i need your advice , what should i do?

What is the width of the 17-inch rim you installed? Have you adjusted the shock preload?

[mouradjan]

Originally Posted by SpudRider

What is the width of the 17-inch rim you installed? Have you adjusted the shock preload?

U mean the spring adjust?

[SpudRider]

Originally Posted by mouradjan

U mean the spring adjust?

Yes. Have you adjusted the spring preload of the shock absorber, as described in the following thread?

http://www.chinariders.net/showthread.php?t=14677

[Jay In Milpitas]

Originally Posted by mouradjan

Hi everyone ,i need help .I changed my RX3's rear rim to 17 inch.Because there is no dual purpose tire for 15 inch rim.And i dont wanna buy a cst brand tire .Now i am using a Kenda 761 130/80-17 but my rear monoshock doesn't give any comfort anymore.Bike is not an enduro anymore it is like a street oriented bike.Becase with this tyre bike became more then 3, 5 cm taller at the rear .Now i need your advice , what should i do?

Hello Mouradjan.
I am not understanding. Changing the tire should not have done anything to the monoshock. Is this a separate problem?

If you want the rear lower, can you adjust the spring on the rear shock?

I wish to help if you can explain in a different way.

[mouradjan]

Originally Posted by Jay In Milpitas

Hello Mouradjan.
I am not understanding. Changing the tire should not have done anything to the monoshock. Is this a separate problem?

If you want the rear lower, can you adjust the spring on the rear shock?

I wish to help if you can explain in a different way.

Its my bad.i changed the rim and tire .But i didn't adjust the shock preload.☺ This is my first motorbike so i am learning .Hehe Now it is much better when driving.I figured that spokes are not tighten well.i am learning ,i am learning. 😆 I will read everything about my Zong.

[Jay In Milpitas]

Originally Posted by mouradjan

This is my first motorbike so i am learning. i am learning ,i am learning. �� I will read everything about my Zong.

Very good! Reading is very important, so is understanding. I hope you have friends that ride that you can ask questions. Even different bikes share many parts and things to work on. A piston doesn't know what brand of engine it is in, same with a spoke.

Learn, enjoy, share information, ask questions.

[mouradjan]

When we adjust the preload we lowered the rear of the bike,didn't we . So when we stiffed the spring at least 6 turnes .what cm or inches we lowered the bike .Did anyone measure it?

[mouradjan]

it is 3×17 ,it is original Rx3 rim.i bought it from the dealer of Rx3.i changed the shock absorber to smoother.But i couldn't get a good result.at 60 miles bike is starting shacking its head up and down.And starting a little vibration .
Spudrider do i have to change my front rim to 19? i feel like my bike's front is lower then it should be.

[SpudRider]

Originally Posted by mouradjan

it is 3×17 ,it is original Rx3 rim.i bought it from the dealer of Rx3.i changed the shock absorber to smoother.But i couldn't get a good result.at 60 miles bike is starting shacking its head up and down.And starting a little vibration .
Spudrider do i have to change my front rim to 19? i feel like my bike's front is lower then it should be.

No, you don't need to change the front rim. Our RX3 motorcycles in the United States have a 3.00-17 rear rim, along with an 18-inch front tire, and we aren't having any such problems.

If the front wheel is bouncing up and down, I suggest you verify whether or not the rim is 'true.' The rim must be symmetrical both radially, and laterally, in both the X-axis and Y-axis. If the wheel is not 'true' (symmetric) in both axes, the wheel will bounce.

I also suggest you check the front tire for unusual wear patterns.

If the front wheel only bounces while braking, I suggest you install another front brake rotor.

[SpudRider]

Originally Posted by mouradjan

it is 3×17 ,it is original Rx3 rim.i bought it from the dealer of Rx3.i changed the shock absorber to smoother.But i couldn't get a good result.at 60 miles bike is starting shacking its head up and down.And starting a little vibration .
Spudrider do i have to change my front rim to 19? i feel like my bike's front is lower then it should be.

I also suggest you check the 17-inch rear wheel for 'trueness.' If the wheel was not built 'true' (symmetrical on 2 axes), it will hop. Also, the wheel will hop if the spokes loosen. It is important to check the spokes for tightness after building a new wheel.

Indeed, it is important to periodically check the spokes on both wheels, to insure they are tight.

[LordRad]

I guess I'll have to stop being lazy, I really like how those Tourfellas look and the pricing seemed reasonable but it ain't that way.
I'll check locally for aluminum sheets and will make the design for the racks myself, the mounting knobs look real nice and having those shipped to colombia is not expensive at all (anything past 10lbs is), gonna have to find the time to actually do that tho. will do post the renders when I get down to it.

thank you all for the replies

[mouradjan]

Originally Posted by SpudRider

I also suggest you check the 17-inch rear wheel for 'trueness.' If the wheel was not built 'true' (symmetrical on 2 axes), it will hop. Also, the wheel will hop if the spokes loosen. It is important to check the spokes for tightness after building a new wheel.

Indeed, it is important to periodically check the spokes on both wheels, to insure they are tight.

U are great☺, i checked everything u said .The front rim spokes tightness has problems.i have to check them. And rear rim's 4 spokes are not tighten well too.I adjusted the spring preload of the shock absorber as u describe☺.I guess 7 turns will be good. I will try my bike tomorrow.may be i change it to a different stiffnes .Thank u for all the info .