I have just purchased a vintage speedster with a 1600 twin carb engine, it would appear that there is an additional pipe running from the oil filler pipe back into one of the air filters on the carb. I have noticed that there is now a build up of oil on that air filter where oil appears to be coming from the pipe. Is this normal ?
Also what should a 1600vw engine rev up to ? This engine is not happy beyond 4000rpm?
Excuse my ignorance re these engines.