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Similar Forum Topics
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By logray
Hi all,
I am wondering if any of you have a Clutch Starter gear from a 1988 era quadrunner 250 sitting around that you could get me a precise measurement of the outer diameter of the race the sprag engages onto, for me? I need to machine a damaged race down and install a hardened sleeve and need that measurement (it's on a different gear than the OEM one, so I can't buy and use a OEM gear).
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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 harryjr
hello everybody my name is Harry jr and i recently picked up a 90's Yamaha moto4 225 i beleive and neede a starter was all he said ( i know right ) thats what they all say
anyway i picked up a starter and installed it and when it is crankling it sounds as if it is not turning over freely as i9f there was a one way bearing not worrking correctly so pulled with recoil and it pulled back so hard i ripped out of my hand so hard it actually hurt now i have pulled and kicked a lot of bikes and such but never felt anything quite like this you can hear it try and fire and kick back but still acts as though somthing holding it back does that make any sense to anybody is it flywheel key , or valves wauyout any help would be great i picked tow of these up for $100 and tring to fix so we can ride as a family thank you in advance.
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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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