SOHC.co.uk Forums > CB750

Tacho Drive Oil Seal

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Martin6:
Thanks everyone. The old seal is definitely out and the area clean. The tacho cable and seal are new parts from David Silver. The cylinder head cover is from ebay. My old one was missing a chunk of gasket surface! I will compare/measure everything with what I took off the bike. Maybe something's incompatible.

Spitfire:
Had the same problem on my 750F1, this is what I wrote at the time on the US SOHC site.

Well still having a few teething problems with the 76 CB750F1, but everytime I have a problem I either do a search on this forum or post my problem, don't think I could have got this far without the advice and encouragement I have recieved.
The latest problem was the tacho drive oil leak, it got worse, so I did a search and found the answer on the famous JohnK6 "How to rescue a CB750 from the garbage dump" thread, boy that should be saved somewhere.
Used a wood screw as advised and out popped the oil seal, 10mm 1/4 drive socket and in went the new one, as stated 5 minute job.

Cheers

Dennis

clinto:
Had the same prob yesterday.New 750 seal and tacho cable.
Remedy was to really force cable  in.   .Perhaps seating/settling seal?

Skoti:
Was it a pattern tacho cable?
If so does does the alloy cable end that fits into the cam cover measure the same as the genuine Honda cable end?

Martin6:
Yep, not Honda on the bag. But it goes into the old cover fine. I can see some machining rings in the hole the seal goes into. They may be stopping the seal seating fully. I've been reluctant to force it in. I'll either do a light bit of sanding or use a little force with a suitable socket on the seal. I think a bit of force first.

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