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  1. Raptor 660 Maintenance
    Hello everyone, I have a 2005 raptor 660r HMF slip on exhaust and a k/n air intake with spacer plate and no lid. I am having a bogging/backfire issue at mid throttle and then it dies idles fine and can ride fine at WOT carb main jet sized are 175L 180R I am unsure about other jet sizes and what...
  2. General 660 Discussion
    Alright so I’m having an “issue”. I was riding the other day and out of the blue my bike started running like crap. Acting like it was running out of fuel, backfiring, sputtering and then completely died. Brought it home and tested compression (180psi), strong blue spark, plug cardboard brown...
  3. Raptor 660 Maintenance
    I bought a 2004 Raptor 660R. Ran well during test drive. First ride at home ran great for 20 minutes, then started sputtering and backfiring like crazy. Got worse during subsequent rides to the point it would barely idle. From what I can tell it has a stock exhaust (not sure if baffles were...
  4. General 660 Discussion
    We just put a new carb in and have been tuning it but every time we test drive it the needle jets keeps popping out of the diaphragm (the small spring and plastic holder). We have tried switching out the old diaphragm and jets but it keeps popping out and then it just sputters or won't start...
  5. Raptor 90, 80 and 50
    has anyone put a bigger carb on there 90, if so was there a difference.
  6. General 660 Discussion
    Hello everyone, I am new to the raptor world. I have an 03 660 and when I first got it it was leaking gas out the overflows. I took the carb apart, cleaned the float needles and jets. It now doesn’t leak but I still have no response through the mid section of acceleration.could this be a hole in...
  7. General 660 Discussion
    Recently purchased a 2005 Raptor 660. The factory exhaust was rusted and not connected, so I purchased a Lexx exhaust and K&N air filter .. installed fine, started a little rough, but sounded great.. after I let it warm up I tried to go for a quick ride and it stalled out 100 yards in, then...
  8. General 660 Discussion
    Hey guys, got the carb back on, started it with choke and was excited cause it sounded perfect! Let it run for a little then turned off choke and it starts idling super high. What can be causing this? Thanks
  9. General 660 Discussion
    I bought an 01 raptor 660, had carb issues. Previous owner attempted to work on it, set the air/fuel way to deep. I went to back it out and the needle snapped off and was stuck in the carb. I messed with it for hours till I finally got it out. Problem is the hole is noticeably bigger then the...
  10. Raptor 660 Modifications
    I'm redoing a carb on a 01 raptor 660 I bought. It has a full yoshimira exhast set up. Airbox lid is on but it has a flap cut out and k&n filter. The carb has bin torn apart alot and the jets are banged up and i just wanna replace it all. I can see that the pilot jets are #25 and I believe...
  11. General 660 Discussion
    Alright guys, this is my first time really wrenching on a bike so please answer with some detail. I bought an 01 raptor 660 a month or so ago, I saw it, loved it and needed it. But man its bin nothing but a headache ever since. The bike needed some love, the previous owner didn't take care of it...
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