SOHC.co.uk Forums > CB500/550
mysterious oil leak
Bryanj:
I would complain to him
McCabe-Thiele (Ted):
--- Quote from: Bryanj on August 08, 2025, 05:53:37 PM ---Wonder if the dealer you got them from just sent crap? I would be tempted to wind some gas fitters ptfe tape arround the screw thread, yes there is a different tape for gas and water
--- End quote ---
Water is usually white PTFE tape.
Gas is usually yellow PTFE tape.
JezzaPeach:
My 500/4 had the cam top breather pipe missing and I think an oil mist had circulated around causing filth to stick in lots of places. Also a drop of oil hanging off the sump fins but not really dripping turned out to be oil pump seals, but only while running, losing a lot of oil. Seals from Julie.
My fuel tap was letting by, not good. Seals from DSS and I used a little PTFE cycle grease just because it’s what I had to hand and it’s lasted well.
mickwinf:
had a further look and found the manifold rubber clamps a little loose and put the breather rubber tube on, seems to have cured that problem. also found the main crank seal behind points plate is leaking despite being new. also front forks dribbling fluid but found the drain plug bolt was loose so hope it was an easy fix.
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