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Author Topic: Crankshaft oil seal  (Read 588 times)

Offline v8ivor

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Crankshaft oil seal
« on: 22.11. 2015 12:08 »
Does anyone recognise this main bearing set up for a 52 A10 ? Only I cannot see an oil seal !
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Online muskrat

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Re: Crankshaft oil seal
« Reply #1 on: 22.11. 2015 19:04 »
G'day Ivor.
No seal in the primary side crankcase on plungers up to 1954. I'm not sure but they may have with the later 54-57 plunger models.
Cheers
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'51 A7 plunger, '57 A7SS racer now a A10CR, '78 XT500, '83 CB1100F, 88 HD FXST, 2000 CBR929RR ex Honda Australia Superbike .
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Online Greybeard

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Re: Crankshaft oil seal
« Reply #2 on: 22.11. 2015 19:41 »
Yes, I thought my '55 has a seal; didn't realise earlier models did not.
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Offline trevinoz

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Re: Crankshaft oil seal
« Reply #3 on: 22.11. 2015 21:24 »
The seal came in with the BA7/10 engines.
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Offline KeithA

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Re: Crankshaft oil seal
« Reply #4 on: 24.11. 2015 09:08 »
Interesting post.
How does the pre 54 engines breath from the crankcase with the piston down stroke.
Is the primary case pressurized a little as a result ??
Thanks Keith
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Re: Crankshaft oil seal
« Reply #5 on: 24.11. 2015 19:13 »
G'day Keith.
The breather system is the same and yes it does get pressurized a little. The only problem I've found is that when she wet sumps a fair amount of oil drains into the primary.
Cheers
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'51 A7 plunger, '57 A7SS racer now a A10CR, '78 XT500, '83 CB1100F, 88 HD FXST, 2000 CBR929RR ex Honda Australia Superbike .
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