Well i bought i slip on exhaust system, twin air filter and moose box . could any give me an idea what jets to use. Dynojets instructions are good but they dont say to change anything with air filter swap. I running 5000 foot and above. thanks everyone

 

They say that you dont need to rejet for the pipe and Twin air if dyno jet already installed. My Dyno Jet was already installed and I still needed to rejet. Here is a links to the posts when I was doing all of those mods. I did switch from my original dyno jet recommendation of 144 in the front and 150 in the rear to 155 front to 165 in the rear and those jets were sent by HMF for me to replace.

http://atv.dnsalias.com/forum.cgi?vi...wasaki_Brute_F orce&viewtopic=752