SOHC.co.uk Forums > CB350/400
Oil leak
adriangsmith:
Quite a good seep once its revved up
Sent from my LG-H870 using Tapatalk
Nurse Julie:
I know i had real issues with those casing bolts on my engine, trying to fit the correct length bolt to each hole was difficult. I measured all my bolt holes with the vernier in the end to make sure i put the right size in the right place. really, it can only be a slight misalignment or the bolt has gone through the casing. No other way oil could come up the thread, the bolt / thread shouldn't be anywhere near oil.
Nurse Julie:
Here is a pic with the sprocket off, I can see how if an over long stud had been put in, it could easily have caused a crack. The crack may not be visible as it could be internal not external [ Guests cannot view attachments ]
Nurse Julie:
Also, if you say it weeps when you rev the bike, the oil is under pressure. The bottom of that bolt hole is very close to the oilway junction from the oil pump that feeds the gearbox. You could try removing the oil pump, put an airline up the oilway and see if anything comes up the bolt hole, if it does, there is a crack there somewhere.
adriangsmith:
Cheers Julie,
I will check tomorrow.
I'll take the sprocket off as well so i have a clear view.
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