Vintage and Classic Hondas

84 CB750

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Mauserman

84 CB750

Hello all,

Firstly, I want to say nice forum. Interesting reading about technical stuff from various sources.

I have recently bought a '84 CB750 FD, with really low mileage of 16000 for it's age. I believe it is genuine as the bike is really in good condition and paperwork is sound. Runs really well, its just that when starting, it appears to struggle sparking on 1 cylinder until warmed up then is really smooth. Smells slightly rich with small amounts of blueish smoke, particularly from the right exhaust, but once warmed up it is barely noticeable. I have changed the plugs and the old ones did have a oily residue. I am thinking valve stem seals need replacing, even though mileage is low, due to the seal compound hardening after so many years.

Do valve seals require replacing due to age?

Thanks and cheers,

TOOLS1

Re: 84 CB750

Administrator

"Do valve seals require replacing due to age?"
Often yes.
TOOLS

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1976 CB 750-A X 2
1977 CB 750-A X 4
1977 CB 750-K
1976 CB 750 F
1981 CB 750
1966 Kawasaki SG 250
1981 KZ 750 LTD
1973 CB 350
1979 CM 185 Twinstar
1982 Honda XL 80
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seestheday

Re: 84 CB750

In reply to this post by Mauserman

Do yourself a favor and get the Viton ones from jebby on this forum. He gives a good deal and they're much better than stock.

1981 CB750K with 900 cams
90K KM's, rebuilt head, rebuilt carbs, upgraded valve stem seals

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