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  1. Another Carb Question...

    Yamaha YFM660R Raptor (2001-2005)
    Hi Guys, this is my first post so please go easy on me... I found plenty of Carb related posts, but nothing specific to my needs, so I could really use some help. I have a 2005 Raptor 660R that hasn't been used in years. I've pulled it out of storage, and have been working on it over the last...
  2. Yamaha Raptor 660R 2003 Running Very Badly

    Yamaha YFM660R Raptor (2001-2005)
    Hey Guys, raptor 660r, running bad, backfiring, not idling 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...
  3. 660r raptor

    Yamaha YFM660R Raptor (2001-2005)
    I have a 2003 raptor 660r. The first time i rode it it ran like a champ, after i got it home it started sputtering and backfiring. I cleaned the jets and carbs. It idles just fine, but when i give it throttle is when it backfires and sputters. Does anyone have any ideas what might be the problem?

    Yamaha YFM660R Raptor (2001-2005)
    Hi everyone i have a 2001 yamaha raptor 660 It will start right up idle fine than at med.-high throttle it bogs,spits and sputters,and backfires. Ifound two wires under the cdi box that were rubbed threw(the white-green,and the white-red cut them and sodderd them still the same e-brake blocked...

    Yamaha YFM660R Raptor (2001-2005)
    I just purchased a 2005 raptor 660r. It came with a curtis sparks x6 full exhaust and a pro flow air filter. The jets are 25 pilots and 167.5L/177.5R mains. Now the problem is that when I start it, the idle seems way too high. My headers then start to glow within seconds and I get constant...
  6. 1988 Banshee Help

    Yamaha YFZ350 Banshee (1987-Present)
    I have a 1988 Banshee and at first one side was firing more than the other and the plugs would faul out quick but the one thats not firing as much fouls first and now it pushes out lots of white smoke out the one side and it back fires every once in awhile. it starts fine cold but when it gets...
  7. NEED HELP !!! Not even rideable !!

    Yamaha YFM660R Raptor (2001-2005)
    Hello, :help: I am in desperate need of some help here !! I have an '03 Raptor 660 with the 686 Big Bore Kit, Full Yoshimura, Edelbrock Single Carb., & Stage 1 Hot Cam. This whole problem started with the stock carb and hasnt changed at all with the new carb. I also contacted Edelbrock support...
  8. yfz problems

    Yamaha YFZ450/450R (2004-Present)
    i bought a yfz that was seized then but a new crank in it. i have the third timing mark on the right lined up on the flywheel. and the two dots are lined up with the top of the head. its got spark and is getting gas. every once in a while it backfires real bad. i have no clue what else could be...