Need to raise the rpm on my 400ex

[gel1197]

I do about 50/50 trail and dune riding in Florida. The 400 hates to ride the trails slow. I either have to ride 1st gear with way to high rpm's or ride 2nd with way to low rpm's. My question is what sprocket (sprockets) and chain could I install the would increase the rpm's while riding in 2nd gear? I understand it may effect the top end but I really don't race or need to go that fast. Any ideas? I would like to swap just one sprocket if possible. The bike is stock except for the K+N (airbox still on) and jets.

[shadowwalker]

Try dropping the front sprocket a tooth.

[gel1197]

What size is the stock tooth? Do I need to change the rear sprocket or chain also? Thanks

[08400EX]

Originally posted by gel1197
What size is the stock tooth? Do I need to change the rear sprocket or chain also? Thanks

Search for "Sprocket" or use this link, it will answer all your questions.

http://www.exriders.com/vbb/search.php?s=&action=showresults&searchid=1852124&sortby=&sortorder=

[Brauap]

The stock is 15t front, 38t rear. If you want a slightly greater gain drop 1+2 teeth in the front. If you want a slight change, change the back, go up 4 or so teeth. But remember, every three teeth you go up or down you need to either add or take away a tooth. And the rear are more expensive than the front. If you want fronts, look on eBay. Theres a guy who sells them on there, very nice guy and there cheep too!

[08400EX]

Originally posted by Brauap
The stock is 15t front, 38t rear.

Not so for all years.. 2005-2008 has 14 front 39 rear.

[maclavin]

quote:
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Originally posted by Brauap
The stock is 15t front, 38t rear.
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Not so for all years.. 2005-2008 has 14 front 39 rear




And the splines on the output shaft are also diff.after 04