600 won't crank.
OK so like my intro said, I'm here to learn a few things so I can help out my father-in-law. My wife and I decided to fix his bike as a birthday/x-mas present. He has a KLR600 that I think is an '87. Kick start unit with over 45k on the clock. I don't think he has ever done any real maintance to it besides change the oil as he is not very mechanicaly inclined. So here is the problem.
Ride home from work one day, it just died. With a fairly loud thoud I think. He says it will rotate once then the second rotation it gets hung up and has to be forcefully rotated. Now I've never been great at diagnossing engine problems, but this sounds like one of a few problems to me:
1) timing is off and crashing the valve into the piston therefore not allowing it to finish its rotation.
2) piston rings have embeded themselves into the cylinder wall.
3) conrod broke and is getting hung up somewhere.
Any ideas on what the problem could be or how to fix it? The only thing is that I can not get to the engine as he lives in Tacoma, WA and I'm in Atlanta. So, is this a fixable engine or should I start looking to buy a newer one to ship to him? Also, what are the possibilities for using 650 parts with the 600 engine?