smoke/hot pipes/leaky exhaust joint

[noobie mcnooberson]

Hi there, so I tipped over my bike (1982 Honda CB 750k) trying to fix it, left it lying there for about a half hour while I hopped around on one leg trying to find ice for my shin etc. Well, I gave it a day to let everything drain out that might have flooded in, and when I started it today, it started smoking almost immediately. The smoke I traced to the joint between the exhaust and the four pipes, which is bubbling out a black oily tar substance all over my driveway (anyone have any suggestions on how to get oil stains off pavement? besides just doing the repairs on public property?). How should I go about fixing that? And the other problem was that just after a minute or so of idling, the pipes were blazing, seriously hot. I felt the heat and touched one briefly and now have a blister on my thumb. I checked the oil on the level bike after the engine had cooled a bit and while it is on the lower side it is still a fair bit above the bottom line, so I don't think that's it. Is the smoke and the hot pipes connected do you think? What else should I check? Thanks much! On a lighter note, I'm kind of happy it happened, as I got the bike so I could learn about how it worked mechanically, and this is just another chance for a lesson![/list]

[mojocrankspleen]

when you tipped the bike over oil leaked threw the cylinder wall into the combustion chamber and now you are burning it off. if there is oil leaking out of the exhaust pipe you probably had a leak to begin with. there is a copper or lead gasket between the cylinder head and the exhaust pipe that you should replace, (if that’s where the oil is leaking from).