...jetted to run richer? Thinking about putting a Skinz Ultra Q silencer and Boyeson Rage Cage valves on a 2002 Yamaha SX600R, triple cylinder, 2-stroke snowmobile. The only mod on it are boyeson power reeds, otherwise it's all stock. I've heard Yamaha's tend to run rich out of the factory so i was wondering if i would have to re-jet. Any other tips or warnings are appreciated