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backfiring

  1. Yamaha Raptor 660R 2003 Running Very Badly

    Raptor 660 General
    Hey Guys, What's up? I'm having a bit of a problem here with my 03 Raptor 660R. Firstly it had a lot of issues startin, so i dug up the internet and found that the sparkplug "sensor" had some rust. I've cleared it out and it simply fixed the problem of not easily starting. The problem that...
  2. 2001 660r hesitant at start backfire on hard down shift

    Raptor 660 General
    i have a slight hesitation on take off then it opens right up and runs like a champ... then going from full throttle in 5th gear ill down shift fast and hard for a corner and once in awhile it will backfire then run great again as soon as i put the hammer back down.. and ideas? as far as i know...
  3. Popping/backfiring while downshifting...

    Raptor 660 Mods
    Hey guys, New Guy here... I've been reading the forums for a while now and thought I should join in! I have an 03' Raptor 660 that has been worked a little before I bought it. It has a set of hot cams in it, a slip on fmf muffler and no air box lid. When I bought it the starter solenoid was bad...
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