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  1. YFZ450 & YFZ450R General Talk
    i have a 14 yfz450r fuel injected. ever since i installed my new exhaust and intake, it sounds like an ak-47 once i let off the throttle 🤣🤣. the back firing is crucial. not wanting to spend 800$ on a vortex. could a power commander fix the back firing?
  2. Maintenance
    I have an 2004 Yfz and it backfires, won’t idle for more than 10 sec and is hard to start. I am looking for answers
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