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  1. YFZ 450
    so i just picked up a 50th anniversary yfz450 and i when i turn it on it cranks and runs but when i rev it, it backfires and sputs and when I'm driving it it revs and drives but then on low rpm it tends to bog out and almost stall. only idles with choke on but obviously revs really high idles...
  2. Raptor 660 Maintenance
    the bike starts up and idles perfect but as soon as you touch the throttle it dies. i don’t know what’s wrong with it. i bought it like this. it could be because i have the boots that go to the air box missing but i don’t think so. if anyone has any way they can help me i would really...
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