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Author Topic: CB750 crankshaft oil seal - no lip on seal aftermarket  (Read 627 times)

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Offline Ace

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CB750 crankshaft oil seal - no lip on seal aftermarket
« on: May 24, 2020, 03:43:13 AM »
Hi all, purchased an oil seal kit, about to Honda bond it all up and noticed that the crankshaft oil seal doesn't have the lip that fits in the groove to keep it in place. Part number 91201-300-003.

Should I use it or go genuine? Anyone else noticed these or used these seals and any issues leaking or coming out?
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1971 CB750 K1 - Sold
1978 CB750 F2 Supersport - Sold
1981 CB900 Bol d'or - Sold
2006 CBR1100 XX Super Blackbird - Sold

Offline PeWe

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Re: CB750 crankshaft oil seal - no lip on seal aftermarket
« Reply #1 on: May 24, 2020, 05:04:47 AM »
It should have a metal washer on inside too.
If this seal is wrong part, it can cause huge oil leak and PITA to fix.
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CB750 K6-76  970cc (Earlier 1005cc JMR Billet block on the shelf waiting for a comeback)
CB750 K2-75 Parts assembled to a stock K2

Updates of the CB750 K6 -1976
http://forums.sohc4.net/index.php/topic,180468.msg2092136.html#msg2092136
The billet block build thread
http://forums.sohc4.net/index.php/topic,49438.msg1863571.html#msg1863571
CB750 K2 -1975  build thread
http://forums.sohc4.net/index.php/topic,168243.msg1948381.html#msg1948381
K2 engine build thread. For a complete CB750 -75
http://forums.sohc4.net/index.php/topic,180088.msg2088008.html#msg2088008
Carb jetting, a long story Mikuni TMR32
http://forums.sohc4.net/index.php/topic,179479.msg2104967.html#msg2104967
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