- Joined
- Oct 10, 2018
- Messages
- 153
Guys.My 1970 750 Commando was finished few months ago.Engine was rebuilt by one of UKs most prominent builders.For first few hundred miles, bike ran perfectly.Started without fail, pulled like a train.
The engine has the CNW/Comstock breather mod fitted to lower case,returning back to top hat on oil tank.
There is a magnatek(?) oil filter fitted on return pipe.
An anti wet sump valve from Holland Norton works is fitted at oil feed.The breather from front of oil tank(circled in red) vents to a catch tank as shown.
Initially there was virtually no oil mist accumulated in the catch tank.
However it recently began to smoke from both barrels when hot.Not excessively but its there.Also, the catch tank fills with oil pretty rapidly.However, strangely oil doesnt vent from catch tank to atmosphere.
My engine guy and myself are pretty puzzled as to what maybe happening.
Hopefully you guys can offer some input.Thanks.
The engine has the CNW/Comstock breather mod fitted to lower case,returning back to top hat on oil tank.
There is a magnatek(?) oil filter fitted on return pipe.
An anti wet sump valve from Holland Norton works is fitted at oil feed.The breather from front of oil tank(circled in red) vents to a catch tank as shown.
Initially there was virtually no oil mist accumulated in the catch tank.
However it recently began to smoke from both barrels when hot.Not excessively but its there.Also, the catch tank fills with oil pretty rapidly.However, strangely oil doesnt vent from catch tank to atmosphere.
My engine guy and myself are pretty puzzled as to what maybe happening.
Hopefully you guys can offer some input.Thanks.