looking to power up my kfx 400,what are some mods will help power ,speed etc.what mods have you done and whats your favorite?

 

I started by removing the airbox lid and puting a 155 mainjet in it.
Their was more throttle response, and more top end power.
Then I got a CT pipe and a dynojet kit.
It revs a lot easier now and pulls through the gears alot better.
I ordered a K@N filter kit, still waiting for UPS man.