SOHC.co.uk Forums > CB750
Engine smoking
yozzer74:
Do we think putting different oil in will help
tom400f:
20 miles today or 20 miles since rebuilding it?
What is the colour of the plugs? Consistent across all cyls?
What oil are you using? Doubt it will make any difference. Just to say I am using the Europarts semi-synth diesel stuff discussed on here without any apparent problems.
Edit: Watched the rebuild video - must say, lovely work.
Bryanj:
what oil is in it?
Johnwebley:
after an engine rebuild,you should use the most basic mineral oil,
it helps the motor bed in,also a bit of firm acceleration and then shutting the throttle helps the ring to seal,
the smoke looks either the pump is not scavenging ,or the rings are not bedded in,or the valve stem seals are leaking
check the plugs,see if they all show oily tips,
yozzer74:
The plugs are black .this is the oil [ Guests cannot view attachments ]
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