High Comp Piston Jetting


2 replies to this topic
  • almostinvincible119

Posted August 11, 2008 - 07:23 PM

#1

I have a 06 450 with brand new valves, a new wiseco HC piston, polished exhaust ports, and a Carbon Pro exhaust. I ride at sea level, and I was wondering with these new mods (the piston, valves-still TI, and the polished ports) would i need to richen up my main jet? or do anything else specifically?

thanks everyone in advance

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  • grayracer513

Posted August 11, 2008 - 07:50 PM

#2

I was wondering with these new mods (the piston, valves-still TI, and the polished ports) would i need to richen up my main jet?

Maybe. Maybe not. Maybe you'll need to go leaner.

http://www.thumperta...699#post2881699

  • desert-rat660

Posted August 11, 2008 - 08:45 PM

#3

i added a hc piston from je, changed the valves. it was running rich after the mods. i went up one clip position on the needle. the bike runs great now and starts easier.
So im with gray, u should have to go leaner





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