wat else can i do with this thing? wanna make it climb faces at coos bay and keep up with 440ex any help guys>

 

GO TO THE YOMOMMA SITE

 

Well by the looks of your sig you are pretty much maxed out. It doesn't say a high compression piston so you could try that. A 400 should be makin pretty good power, have you ever had it dynoed??

 

You probably would have gotten more responses in the Yamaha thread site. Maybe you should try there? I did see an article in the July 2002 issue of ATV Action about the ALBA Warrior 400. The ALBA 400cc stroker kit (for 1350.) is supposed to boost the HP from around 18hp up to 29/30hp.