Hi
A friend of mine has a 400 ex piped jet and race air box he fitted 21" geckos and finds the gearing is to tall (think its stock at the moment)
can any of you guys help out and recommend sprocket sizes to allow the bike to rev out in top gear

I was thinking of trying one less tooth on the front but any advice would be apreciated
thanks

steve

 

Just do like you say, and try going down 1-2 teeth on the front sprocket.

 

Thanks for the reply.

i will give it a try and see how it goes. Do you know by any chance what the stock sprockets were on the 400 ex i think its a 2001

 

15 Front and 42 Rear but not for sure the backs 42.

 

NO!! The back is 38, and the front is 15. I would go with 14/38 or 13/38. Though you will lose some top end.

 

thanks guys

i will try a 14 on the front and see how it goes it has a poor top end now as it dies in 5th gear with it being so tall

 

sorry I forgot it's been a while since I last saw what it's last sprocket size. Try a 14 like me it works great.

 

I dropped my front down to a 14 when I put 22 inch knarly`s on the back....it appears to be a good combo on my 400