I put the RD350 bottom end together (6 speeds present and everything turns freely and smoothly) and found my right side crankshaft O-ring 360-11526-00-00, the goofy one:
(https://i.ebayimg.com/images/g/uVEAAOSwmI9e81Mo/s-l300.jpg)
is crap. Economy is out of stock, CMS has a reproduction in the Netherlands and there are a few on eBay for $60-70. Couldn't find it at any retail site, HVC or FFTP. Anybody know of a better source than I've found?
Quote from: 85RZwade on November 12, 2021, 12:46:34 AM
I put the RD350 bottom end together (6 speeds present and everything turns freely and smoothly) and found my right side crankshaft O-ring 360-11526-00-00, the goofy one:
(https://i.ebayimg.com/images/g/uVEAAOSwmI9e81Mo/s-l300.jpg)
is crap. Economy is out of stock, CMS has a reproduction in the Netherlands and there are a few on eBay for $60-70. Couldn't find it at any retail site, HVC or FFTP. Anybody know of a better source than I've found?
I don't use them, just a bit of yamabond on the key
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Thank you, I thought I remembered a post to that effect but couldn't find it. DesmoDrew found them at Mike's XS as well, so I just have to decide how impatient I am. I have Yamabond 4...
Wade
Please see if this works
https://www.ebay.com/itm/Rubber-Seal-Crankshaft-Yamaha-RD250-RD350-RD400-1973-1977-Crankshaft-O-Ring-/153437427452?mkcid=16&mkevt=1&_trksid=p2349624.m46890.l49286&mkrid=707-127634-2357-0
https://www.mikesxs.net/yamaha-crankshaft-seal.html
https://www.dimecitycycles.com/yamaha-crankshaft-seal.html
ive used just an o ring and a dap of silicone in the slot. use 'the right stuff'. or nothing, early bikes didnt even have that o-ring, just a longer key. ;)
What mark said.
LC just uses a plain o-ring.
Dab a little MotoSeal on the key as needed.
what size oring to be sure?
I got one from Lyn , and if I remember right Lyn said yamabond would do.
This thread should be added to the "engine" section of the Yamaha tech posting page.
Stuff like this is golden info.
Thanks to all for the information; more pearls than I hoped for!
Quote from: Striker1423 on November 12, 2021, 01:41:09 PM
what size oring to be sure?
24mm OD, 1.7mm cross-sction
Quote from: soonerbillz on November 13, 2021, 10:43:59 AM
This thread should be added to the "engine" section of the Yamaha tech posting page.
Stuff like this is golden info.
Done! :thumbs:
I decided to go the Yamabond route. It's curing near the wood stove now.
Where is this seal located? I can not find it in my shop manual.
Thanks much
Right side of the crank, it seals the primary gear. It was a change made by Yamaha midway through the 74 model year