in order for people to decide where to best spend their money to get the end result they are looking for.... it would be great if people who have actually dyno'd their machines would show what they got .... and tell what it took to get to that level.... Money Spent / Power Returned...

I"m considering purchasing the badboy JSR cylinder for many reasons, but I am not sure where to purchase one. Do any site vendors carry them or would I have to go direct through JSR? Any help is much appreciated. Thoughts on Pros & cons on 98 vs 100mm

symptoms of a bad stator? and a clutch question so I've got my winter rebuild done, and ive been on 3 rides since then on a brand new battery, and its already half dead. it cranks over fine (maybe a little bit slow) but it starts up and everything, but after a day of riding, it starts to want...

This is a pretty basic outline for jetting on the YFZ450. These settings are for sea level if you are anywhere from 1500ft to sea level these settings should be very close to right on. Anything above 1500ft should lean the settings accordingly. Also, as a good adjustment you should raise the...

This is a simple write up for any year yamaha yfz450 quad to convert to yz450f cam timing.... also known as the "cam mod". No this will not hurt nor damage the motor in any way IF done correctly. I know some people have heard that there could be some issues with doing the cam mod on an '06/'07...