engine trouble

[Mudge21]

I just bought my first bike and it is an 81 cb750k.  It only has 17,000 miles on it and is in good shape.  I have a hole in the muffler (so if anyone has one they want to sell let me know).  I am also having trouble with it running.  While trying to hold the bike at a certian speed it feels like the gas is cutting in and out.  I have been trying to find a free pdf of the service manual.  If anyone has any advice about the problem I would love to hear it or if they know where to find a service manual.  I appreciate the help.

[blackhawkrider]

You can find haynes or clymer manuals still. Also your problem could be alot of things. It could be the hole in your muffler or unbalanced carbs these are the most likely. Also could be a host of other things but start with the hole in the muffler. If its not to big and its not from rust a good welder might be able to fix that for you.