I'm hoping I might be able to get some help from you guys.
I have a 1950 Comet with a Bob Dunn big bore/stroked engine.
Due to illness, it has taken me a long time to build the bike. It runs well for 50 miles or so, but then starts to smoke a lot - still runs well & smoothly.
I presume that the valve area is under pressure. I've put on a vented valve cover - but before I try it, I'd like some opinions re cause and effects please.
Many thanks - Richard
I have a 1950 Comet with a Bob Dunn big bore/stroked engine.
Due to illness, it has taken me a long time to build the bike. It runs well for 50 miles or so, but then starts to smoke a lot - still runs well & smoothly.
I presume that the valve area is under pressure. I've put on a vented valve cover - but before I try it, I'd like some opinions re cause and effects please.
Many thanks - Richard