Vintage Dirt Bike Q & A

Transmission needle bearings
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Author:  diesel digger [ Fri Dec 01, 2017 8:00 am ]
Post subject:  Transmission needle bearings

Does anyone have a source for the RH main shaft needle bearing 91020430008? 78-80 CR250. 81-84 ATC 250r. CR480.
I see Boss Bearing has one that they call "aftermarket". Would like to find a quality bearing if possible. Koyo, NTN.
Thanks, Brad

Author:  m@tt [ Fri Dec 01, 2017 4:07 pm ]
Post subject:  Re: Transmission needle bearings

Pretty sure the same bearing is used in some Yamaha’s part# 93311-42045

Author:  diesel digger [ Sun Dec 03, 2017 9:07 am ]
Post subject:  Re: Transmission needle bearings

Thanks for the tip! I looked that part# up and it is indeed a 20x33x15 koyo needle bearing. Gonna order a few. Thanks, Brad

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