does any ones sdo this?

[nicktrx400ex]

my 400ex when it was stock would pull wheelies up and down allday easily now on my modded 400ex it barely pulls up but i know its got power becouse it spins out in 2nd gear on concrete
if anyone else hasc this problem lket me know and how you fixed it i have new holleshots on itxcrs

[JJ69]

14t front sprocket*************<------ need a 12 or 13. its geared for more speed and less power now silly.
also, it might just be spinning instead of pulling up like it used to.. try a higher gear maybe?

[nicktrx400ex]

actuallly it doesnt have the 14th sprokett in it right now but i can try it

[F-16Guy]

Originally posted by JJ69
14t front sprocket*************<------ need a 12 or 13. its geared for more speed and less power now silly.
also, it might just be spinning instead of pulling up like it used to.. try a higher gear maybe?
I don't think so. The LOWEST I would go is a 14 on front. With a 426, you should be able to pull 15/38 easily. You probably have it jetted wrong; most people jet way too rich thinking it's going to give them more power. There are several threads about jetting a 450R carb for the 400ex. I suggest you read through a few of them and see what other people with similar mods are running and how it compares to yours. With a properly built and jetted 426, you should be pulling the front end up with no problem.

[nicktrx400ex]

well i have a i think 165 or 170 main and stock 48 pilot jet i need to get a 46 or 47 pilot jet.

[xxnightraven73x]

with all thats done to mine it still comes up in every gear im still running the stock gearing so thats probably why but there arent many places where i ride to give it a taller gear so its fine by me but i also start my wheelies in first and shift all the way through but it does snap up in all the gears :devil:

[CannondaleRider]

Originally posted by JJ69
14t front sprocket*************<------ need a 12 or 13. its geared for more speed and less power now silly.
also,

Displacement has no effect on gearing, in any way.;)

The idea of it spinning is possible though, try a gear higher for traction, or just adjust your body positioning.

Lastly, did you modify suspension at all? ZPS front, or anything?

[JOEX]

Post ALL your current specs then maybe someone will be able to give you some direction...