Hmmmm, this is dissapointing. I am curious on the condition of both bikes. For instance if the 350x was in the same running condition as the 400.

Oh well, even if it was a fair comparison, my 350 motor should meet and exceed the HP ratings shown on this chart for the 400.

Lets see if I add this piston along with this ........ whoops thinking out loud. hehe

 

I have contacted Lazarus Sommers at http://www.geocities.com/Baja/Ravine/4093/350x.jpg

Gabe
'86ATC250R
'86ATC350X
'00TRX400EX

[This message has been edited by 86atc250r (edited 09-03-1999).]