2004 Raptor 660 New Clutch Adjustments
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By quadnut20
Just picked up a 2025 Yamaha Kodiak 700 fixing to do a EPI Clutch mod to it since I dropped bigger tires on it !! Air box , exhaust , and programmer next !
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By Gtc4d
I recently purchased a raptor 80 for my grandson for christmas. I am trying to make sure it is running properly. i have rebuilt the carb and adjusted the carb idle then the mixture to middle of where it runs rough and it runs great for about a min or 2. then it stalls out. I can usually choke it and it will start so i feel it is lacking fuel. the fuel shutoff valve has been changed and i checked it for good fuel flow. any ideas of what to check next. I am planning to vfy fuel float height tomorrow. I visually checked it by turning carb upside down when i had it apart and it looked level. any ideas are appreciated.
Thanks.
Todd
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By HHurks
Hi to all
Newbie here. Not new to ATVs. Look forward to learning a few new things and hope to maybe help some too.
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By jordan_ATV
I got a 2005 350 Raptor Special Edition and I'm dealing with a no start issue; the weirdest thing is when I'm cranking it fires and slows down showing signs of pre firing, smoke shoots out the carburetor every time it sparks. every electrical part (CDI, Rectifier, Stator, Coil) has been swapped out from previous owner, the top end of the engines all new and I cleaned the carb out, anyone got any ideas or similar problems, also is it possible to have a bad spark timing
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By sunn
The clutch engagement on my 2021 cforce 400s was approx 2700 RPM, very abrupt/not smooth. I obtained a "kit" from RNG consisting of a blue painted spring (spring force unknown) with 12 gram weights, as measured on my postal scale. Installation was easy; 18 mm and 30 mm (not 32 mm as seen on other writings) impact sockets for clutch housing removal. The resultant clutch engagement was still up to approx 2500 and very abupt/not smooth.
The original spring was labeled p/n 0951-1021 (specs for spring force 300/1600) with 18 gram weights.
I called RNG who told me the kit should work fine for my ATV, but that wasn't the case as I found.
The RNG spring was slightly longer than the stock spring, but felt slightly easier at initial downward force but had more resistance than stock as I continued to push down. RNG would not tell me what the spring force was.
I then tested the clutch with the RNG spring and the OEM 18 gram weights with the resultant engagement RPM of about 2050 RPM, a little smoother engagement but still not good.
I am really struggling to get any answers on the best combination of spring / weights to achieve a smooth engagement of maybe 1800 RPM. Note; idle RPM is approx. 1600.
I have searched all the forums and cannot find good information, and RNG appears to be not willing to share information. What gives here? Anyone with experience to share?
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