a few questions

smithyUK · 07-08-2009, 03:20 PM

1 do race cdi boxes work
2 do cone air filters work and do they as i have heard draw in loads of water
and 3 what is the best sprocket set up for off roading
Thanks again folks

AZ200cc · 07-08-2009, 03:56 PM

Not sure on Cdi's, I have read mixed results. Cone filters work but can let water into the carb if You cross streams and such., And the stock large sprocket should be good for trail riding....What is it a 52 or something like that? Can't recall right now.

Reveeen · 07-08-2009, 10:41 PM

do race cdi boxes work

Yes, but you are not going to buy a "race CDI" for less than $100. Typically these little engines run fixed timing with their CDI. A coil picks up current from a passing magnet, switching on a current (thyristor) firing a coil. The nature of the thing is, fully advanced at idle, retarding somewhat as the rpm increases (coil voltage increasing), and with some luck the timing is correct in the midrange (rpm) somewhere. It takes a fairly sophisticated "box" to advance the timing as needed, something that you will not find in less than $100 CDI.

do cone air filters work and do they as i have heard draw in loads of water

Two questions:
Do cone air filters work? Like ANY air filter, be it "cone", or conventional: you gets what you pays for.
Do they draw in lots of water? ANY air filter put in a situation where there is water "to be had" will draw in water/moisture. An air filter that flows air will flow water.

LOOK at what major motorcycle manufacturers put on their bikes, they are usually a large well drained plastic box containing a maze to minimize the water intake, do you not think if they felt they could get away with using a $5 cone filter they would do so?
(or why do you think every other ad for a used Chinese dirt bike with a cone filter says: engine smokes a bit?)

what is the best sprocket set up for off roading

There is not an "absolute" here. It depends on the rider and the terrain.

katoranger · 07-08-2009, 11:04 PM

If you think you will be riding in water or mud I would stay away from cone filters. Espicially a K&N type that has the mesh over a cotton gauze type material. These don't filter dust that well either. The foam UNI type filters are better for dust, but still not effective for water.

If you water to ride in areas with mud and water I would stick with stock airbox.

I prefer the UNI filters, but I also stay out of the water too.

Allen

Reveeen · 07-09-2009, 04:23 AM

Not just riding........storing, if left outside, in the rain, ANY motorcycle with a cone type air filter, uncovered, will get a dose of water.

My Yamaha could benefit, (performance wise) from a cone type filter, but I am really reluctant to make the switch.

katoranger · 07-09-2009, 09:45 AM

I haven't had any issues with the UNI riding in the rain or leaving it outside. It is well protected under the seat. I am sure that it can suck in a little moisture though. Now the pitbike style engine the filter is more exposed and lower to the ground. It is definately more susceptible to weather.

Will it stop me from using one? No.

Allen

Weldangrind · 07-09-2009, 10:20 AM

1. I don't have any experience with aftermarket CDI boxes.

2. I've fabricated splash shields that attach to the hose clamp of a cone filter. They can work rather well.

3. To put a finer point on the gear ratio issue, check out JT Sprockets gear chart: http://www.jtsprockets.com/fileadmin...tgearratio.pdf

zebadoba · 07-09-2009, 06:11 PM

My Roketa came factory with a 15/56 set up for a ratio of 3.75

I tried 14/35 for more speed, ratio 2.50, but she would lug the engine when starting in first gear and did not have the power to maintain 50 mph up a hill, however I could hit 74 mph with a slight down hill!

So I have an in between of 15/45 for a ratio of 3.0 I can change my front sprocket to a 14 and get 3.21 for more off road or go t a 16 for 2.81 for a little more top end.

http://cid-63bbfa3f2598bda7.skydrive...ublic/gear.png
This URL is a quick image of what I think are the gear options for the 200 cc China Bikes.

I think 45 for the rear is good middle ground for mostly street and a little dirt. The good think is they are not to expensive and easy to change around!

I got one gear set from Amazon.com and one set from BikeBandit.

Andy-

smithyUK · 07-14-2009, 03:36 PM

thanks for all the responces
in answer to the filter question i will not be crossing streams or riding in muddy fields (to meny little nooks and cranies for the gy to gather up mud and the standard tyres dont like mud ether lol

) but the feilds are dusty in responce to the sprocket question im around 165 pounds and riding on mostly solid ground

07-08-2009, 03:20 PM	#1
smithyUK Join Date: Dec 2008 Posts: 77	a few questions 1 do race cdi boxes work 2 do cone air filters work and do they as i have heard draw in loads of water and 3 what is the best sprocket set up for off roading Thanks again folks __________________ 'man who be riding bike made in china be walking home' <br />bts 125xtx :mods: dirt tyres,zong hand guards more to come
	0

07-08-2009, 03:56 PM	#2
AZ200cc Join Date: Apr 2007 Location: Show Low Arizona Posts: 2,889	Not sure on Cdi's, I have read mixed results. Cone filters work but can let water into the carb if You cross streams and such., And the stock large sprocket should be good for trail riding....What is it a 52 or something like that? Can't recall right now. __________________ <br />2001 Suzuki DR200SE<br />1997 Suzuki RM250 YIKES<br />1995 Yamaha Breeze 125 daughters<br />1991 Honda XR80r Restored<br />maybe a 2003 Yamaha TTR90
	0

07-08-2009, 11:04 PM	#4
katoranger Join Date: May 2007 Location: Altamont, Kansas Posts: 15,103	If you think you will be riding in water or mud I would stay away from cone filters. Espicially a K&N type that has the mesh over a cotton gauze type material. These don't filter dust that well either. The foam UNI type filters are better for dust, but still not effective for water. If you water to ride in areas with mud and water I would stick with stock airbox. I prefer the UNI filters, but I also stay out of the water too. Allen __________________ You meet the nicest people on a Honda Clone.
	0

07-09-2009, 09:45 AM	#6
katoranger Join Date: May 2007 Location: Altamont, Kansas Posts: 15,103	I haven't had any issues with the UNI riding in the rain or leaving it outside. It is well protected under the seat. I am sure that it can suck in a little moisture though. Now the pitbike style engine the filter is more exposed and lower to the ground. It is definately more susceptible to weather. Will it stop me from using one? No. Allen __________________ You meet the nicest people on a Honda Clone.
	0

07-09-2009, 10:20 AM	#7
Weldangrind Join Date: Mar 2009 Location: Sardis, BC, Canada Posts: 25,977	1. I don't have any experience with aftermarket CDI boxes. 2. I've fabricated splash shields that attach to the hose clamp of a cone filter. They can work rather well. 3. To put a finer point on the gear ratio issue, check out JT Sprockets gear chart: http://www.jtsprockets.com/fileadmin...tgearratio.pdf __________________ Weldangrind "I figure I'm well-prepared for coping with a bike that comes from the factory with unresolved issues and that rewards the self-reliant owner." - Buccaneer
	0

07-08-2009, 10:41 PM	#3
Reveeen Join Date: Jun 2009 Location: orbital platform Posts: 741	do race cdi boxes work Yes, but you are not going to buy a "race CDI" for less than $100. Typically these little engines run fixed timing with their CDI. A coil picks up current from a passing magnet, switching on a current (thyristor) firing a coil. The nature of the thing is, fully advanced at idle, retarding somewhat as the rpm increases (coil voltage increasing), and with some luck the timing is correct in the midrange (rpm) somewhere. It takes a fairly sophisticated "box" to advance the timing as needed, something that you will not find in less than $100 CDI. do cone air filters work and do they as i have heard draw in loads of water Two questions: Do cone air filters work? Like ANY air filter, be it "cone", or conventional: you gets what you pays for. Do they draw in lots of water? ANY air filter put in a situation where there is water "to be had" will draw in water/moisture. An air filter that flows air will flow water. LOOK at what major motorcycle manufacturers put on their bikes, they are usually a large well drained plastic box containing a maze to minimize the water intake, do you not think if they felt they could get away with using a $5 cone filter they would do so? (or why do you think every other ad for a used Chinese dirt bike with a cone filter says: engine smokes a bit?) what is the best sprocket set up for off roading There is not an "absolute" here. It depends on the rider and the terrain.
	0

07-09-2009, 04:23 AM	#5
Reveeen Join Date: Jun 2009 Location: orbital platform Posts: 741	Not just riding........storing, if left outside, in the rain, ANY motorcycle with a cone type air filter, uncovered, will get a dose of water. My Yamaha could benefit, (performance wise) from a cone type filter, but I am really reluctant to make the switch.
	0

07-09-2009, 06:11 PM	#8
zebadoba Join Date: Nov 2008 Location: Pleasant Hill, Ca Posts: 28	My Roketa came factory with a 15/56 set up for a ratio of 3.75 I tried 14/35 for more speed, ratio 2.50, but she would lug the engine when starting in first gear and did not have the power to maintain 50 mph up a hill, however I could hit 74 mph with a slight down hill! So I have an in between of 15/45 for a ratio of 3.0 I can change my front sprocket to a 14 and get 3.21 for more off road or go t a 16 for 2.81 for a little more top end. http://cid-63bbfa3f2598bda7.skydrive...ublic/gear.png This URL is a quick image of what I think are the gear options for the 200 cc China Bikes. I think 45 for the rear is good middle ground for mostly street and a little dirt. The good think is they are not to expensive and easy to change around! I got one gear set from Amazon.com and one set from BikeBandit. Andy-
	0

07-14-2009, 03:36 PM	#9
smithyUK Join Date: Dec 2008 Posts: 77	thanks for all the responces in answer to the filter question i will not be crossing streams or riding in muddy fields (to meny little nooks and cranies for the gy to gather up mud and the standard tyres dont like mud ether lol ) but the feilds are dusty in responce to the sprocket question im around 165 pounds and riding on mostly solid ground
	0