I know there's many posts out there on jetting, and I've read many of them. But now as I'm talking to a parts girl on the phone (literally as I'm typing this), I'm confused because she's telling me the computer says the stock main jet on my 01 KDX 220 is a 142. Is this right? I thought from everything I've been reading that I want to drop DOWN to a 155 main. From what she's telling me, that would be going up to a 155. Am I bass-ackwards here, or is she smoking the good stuff on the job?
I am new to the game. Just turned 140 miles on my new KDX. Pure stock minus the air box lid and Renthal bars.
Thanks:think
I am new to the game. Just turned 140 miles on my new KDX. Pure stock minus the air box lid and Renthal bars.
Thanks:think