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Preferred source for crank seals?

Started by RDDave, February 16, 2026, 09:42:58 AM

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RDDave


I want to change the outer crank seals on my '74 RD350. What source for the seals do you recommend?

Thank you.

.

m in sc

economy cycle. if you have an order over 250 there's a discount code for 2sw.

RDDave


RDnuTZ

he has the best Flat Rate shipping price around too. Everything except big stuff like tires, exhausts, etc.
1987 TZR250R Restricted Japan Domestic market bike (Project)
1977 RD400 (Project)
1974 RD350 (2) (Projects)
1973 RD250 (Project)
2022 Beta 300 X-Trainer, Yamaha Vintage MX, YZ (18)

Yamanatic

I usually hit the local Bearing and Seal Supply store and buy OTC. They typically have what's needed on the shelf, and most seals can be had under $10 for top name brands such as TIMKEN, Fel-Pro, SKF etc. If in doubt, bring the old seal(s) with and have them match them up.

WW 
Of Course It's Gonna Make Some Noise - There's GAS Exploding In There!

m in sc

cranks seals are pretty specific on these. otc isn't going to work well IN THIS CASE. but the rest of the seals, I agree. ive had to get some weird ones before,  in particular a nagging leaking one for a t500 oil pump.  or the sky ones I had to get for the fork seals on the tzr

Yamanatic

Yamaha did have some rather unique seals and bearings, like the TZ water pump, TZ750 lower steering head bearing, and the skinny outboard crank seals on TZ750 cranks, but renewing TD and TZ twin crank seals, I've used OTC after running out of OEM years ago.

I don't have any of the empty boxes from the OTC ones, but it seems they were 'SKF'(Asian) and usually had to be ordered; the RD and TZ seals are different part numbers, so that is probably the RD difference that makes them unique.

ww
Of Course It's Gonna Make Some Noise - There's GAS Exploding In There!

m in sc

mmm no the left handers are fairly unique and the rh ones w the castellations and center ribs are unique. there no reason to go another way a these are all so readily available from many sources.

have i used over the counter 'incorrect' seals years ago when they weren't as available? absolutely, but i wouldn't recommend it.  just my opinion.  :twocents: