A question for those who have removed the catch-can and extended the cranckcase breather so that it discharges somewhere at the back of the bike or on the chain.This modification removes a component which is designed to cycle the oil back into the engine and replaces it with a sort of constant loss system. Is there a steady, noticeable oil-loss which one has to keep an eye on?Tom
Thanks, Matt - that's an excellent page you referred me to, by the way.I've had problems now and then with oil blow-back into the right hand toolbox and have been thinking about modifying the system. I have heard that oil loss through the modified system is small. But an observation the other day has made me wonder. After cleaning out the pipes (from the crankcase to the can and from the can to the timing-chest) I went for a ride of about 5 miles. I happened to check the oil first.When I got back I found that there was oil over my left boot and all over the flat part of the engine behind the cylinder. The pipe had come adrift from the rear of the timing-chest. (I probably pulled it off accidentally when fitting the other end back onto the catch-can.)There was enough oil to drip off and cause a puddle when I put the bike onto the side-stand. I checked the oil again (bike upright, of course) and the level was noticeably lower than before. It seems that there was - or there should have been - oil or oil-vapour passing through that return pipe just about all the time. I'm still puzzling over this one - if I had had a one-way system in which the oil was only allowed out of the engine without being circulated back in, I think I would have been losing oil all the time.Tom
When was the catch can to timing chest connection added to the Bullet?My 2002ES does not have this connection. The oil blow-by pipe goes to the catch-can and from there to the air cleaner box. My previous comment will not make sense if your catch-can has a return to the timing chest. Sorry!
Tom, it sounds like your engine might have wet sumped.
New owner of a year 2003, 500ES Army Bullet here.I see mention of the small plastic pipe that goes from the inlet manifold to somewhere. Mine is attached OK to the manifold (via a small bore metal pipe) and at the other end of the plastic it has an expanded section like it went onto a nipple or something but where is this something please?