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drtracer27
07-15-2010, 01:23 PM
Can anybody tell me how many teeth are on the front and rear of a stock 90? Thanks

musky
07-20-2010, 06:10 AM
I'm pretty sure 40

mbarryracing
07-22-2010, 07:11 PM
2 stroke or 4 stroke?

Stock front sprocket on the 2-stroke is 19T

weldr383
07-22-2010, 08:43 PM
19 frt,35 rear

drtracer27
07-23-2010, 08:05 AM
Thanks for the reply's guys. Are those numbers for a 4-stroke? That is what I am looking for. I am trying to get my boys 08 DS70 a little quicker. Already did the exhaust, carb, clutch, CDI and now I want do the sprockets. I don't want to spend too much money on it since it will never run with the 2-strokes. But he does run competitively with the series he has been running in he just doesn't have enough to pass. Thanks.

mbarryracing
07-23-2010, 01:03 PM
Where are you trying to pass? In the corners or in the straight-aways via a drag race? That will dictate how you tartet your gearing on that 70.

drtracer27
07-23-2010, 03:01 PM
The best chance he would have is through the corners. I don't think he would have much chance on long straights against the 2 stroke's. He is pretty aggressive and runs with them and looks to pass through the corners. I am pretty sure it has a 42 on the rear of it.

drtracer27
07-26-2010, 07:08 PM
I found a very good website with the info:
DS 70 15-42
DS90, DS90X 16-40

CYCLERC
02-14-2011, 06:06 AM
Originally posted by drtracer27
Thanks for the reply's guys. Are those numbers for a 4-stroke? That is what I am looking for. I am trying to get my boys 08 DS70 a little quicker. Already did the exhaust, carb, clutch, CDI and now I want do the sprockets. I don't want to spend too much money on it since it will never run with the 2-strokes. But he does run competitively with the series he has been running in he just doesn't have enough to pass. Thanks.
With this mods the ds90 take live?
I own one stock its the slower atv in the market. I dont now if waste money in this engine or install other engine. With the mods its faster than stock trx 90? Any restriction in variator? Thanks