I recently installed pod air filters in place of the stock air box assembly. This required new main and slow jets as well. I'm also running the valve cover breather hose to a breather filter, instead of the airbox where it used to go.
When I first started the bike after adding the new pods and jets, I think I had the pilot air screws out too far, allowing too much gas into the mixture, and I fouled out spark plugs 2 and 3 shortly after starting it. This is when I had white smoke coming out of the tailpipe, as well as the tailpipes where they are bolted to the engine - but only pipes for cylinders 2 and 3. There was no white smoke when I ran the bike on only 2 cylinders.
Then I adjusted the pilot air screws (turned them in a bit to make the mixture less rich), and installed new spark plugs. The bike fired right up on all 4 cylinders, and sounded healthy enough - except now there is white smoke coming out the tailpipe, and it appears to come out of pipes 2 and 3 (where the fouled plugs were).
My guess is that the piston rings are worn and oil is getting into the combustion chamber, etc. But I'm really hoping this is not the case. If anyone knows of anything else I can try before going in there and making sure the oil isn't getting past the pistons, that would be great.
This bike is super hard to find parts for (the CB 650 was only made from 79-82, and this specific model was only 79 and 80, and it's almost impossible to find parts).
Any advice anyone might have is greatly appreciated.
Thanks.
Matt
PS: I took a video of the issue - you can view it on Youtube here: http://youtu.be/9dQoWo4sniQ
When I first started the bike after adding the new pods and jets, I think I had the pilot air screws out too far, allowing too much gas into the mixture, and I fouled out spark plugs 2 and 3 shortly after starting it. This is when I had white smoke coming out of the tailpipe, as well as the tailpipes where they are bolted to the engine - but only pipes for cylinders 2 and 3. There was no white smoke when I ran the bike on only 2 cylinders.
Then I adjusted the pilot air screws (turned them in a bit to make the mixture less rich), and installed new spark plugs. The bike fired right up on all 4 cylinders, and sounded healthy enough - except now there is white smoke coming out the tailpipe, and it appears to come out of pipes 2 and 3 (where the fouled plugs were).
My guess is that the piston rings are worn and oil is getting into the combustion chamber, etc. But I'm really hoping this is not the case. If anyone knows of anything else I can try before going in there and making sure the oil isn't getting past the pistons, that would be great.
This bike is super hard to find parts for (the CB 650 was only made from 79-82, and this specific model was only 79 and 80, and it's almost impossible to find parts).
Any advice anyone might have is greatly appreciated.
Thanks.
Matt
PS: I took a video of the issue - you can view it on Youtube here: http://youtu.be/9dQoWo4sniQ