Open question to all memebers-Thinking about changing the air filter and exhaust tip on my 07 450 Grizzly to the K&N Air Fliter and the billet 2"exhaust tip. I realize this is a basic upgrade but was wondering about rejetting. I did this to my Rincon with no problems. Any input from other members would be appreciated. I will monitor plug color to get a good picture of whats happening but still wondering about Jet sizes?