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The 2-Stroke Garage => Turning Wrenches => Topic started by: RDDave on June 18, 2024, 09:13:06 PM

Title: Which rear wheel bearings?
Post by: RDDave on June 18, 2024, 09:13:06 PM
RD350B There are so many places that list the bearings and the prices are all over the place. Recommendations please.

Thank you
Title: Re: Which rear wheel bearings?
Post by: m in sc on June 19, 2024, 09:56:50 AM
id just order them from john @ economy. or a local bearing supply house, they have numbers on them, just get a good quality bearing of going outside the MC suppliers. theres nothing really special about them.
Title: Re: Which rear wheel bearings?
Post by: SoCal250 on June 19, 2024, 01:15:49 PM
For both wheels:
6303-2RS C3 - 4 pcs
6205-2RS C3 - 1 pc

For just the rear wheel:
6303-2RS C3 - 2 pcs
6205-2RS C3 - 1 pc

Details for the Yamaha parts for RD250 & RD350:
RD250B Front
RD350 /A/B Front

Brake side (right)  93306-30317-00 (6303-Z; 17mm x 47mm x 14mm)
Speedo drive side (left) 93306-30302-00 (6303; 17mm x 47mm x 14mm)
    **[Note: Same bearing can be used on both sides like '76-78 RD400]

RD250  /A/B Rear
RD350  /A/B Rear

Brake side (right) 93306-30317-00 BEARING (6303-Z; 17mm x 47mm x 14mm)
Sprocket side, inner (left) 93306-30317-00 BEARING (6303-Z; 17mm x 47mm x 14mm)
Sprocket side, outer (left) 93306-20503-00 (6205-Z/C3; 25mm x 52mm x 15mm)
Title: Re: Which rear wheel bearings?
Post by: bitzz on June 19, 2024, 05:19:58 PM
Your local bearing house will have several bearings at several price points, all well below any "dealer" price. Seals too. Being a motorcycle wheel bearing isn't terribly taxing... the cheapest bearing you can find will be fine (as long as you buy it it at a bearing house. DO NOT buy bearings off Amazon or Aliexpress).

Mr. SoCal: why do you want C3 bearings in a wheel?
Title: Re: Which rear wheel bearings?
Post by: SoCal250 on June 19, 2024, 06:25:10 PM
Quote from: bitzz on June 19, 2024, 05:19:58 PMwhy do you want C3 bearings in a wheel?
C3 clearance is common and used often in motorcycle wheels. Some of the Yamaha OE parts specifically call out C3 in the parts manual.

RD350B_rear wheel bearings.jpg
Title: Re: Which rear wheel bearings?
Post by: RDDave on June 19, 2024, 08:11:19 PM
Just the information I was looking for. I was hoping to get the bearings BEFORE I tore it down and wanted to get them at a local bearing supply. You guys ROCK!

Thank you!