A while back I let my buddies borrow my shee because they wanted to go on a trip up north (I had to work and couldn't go on the trip) big mistake. They come back and said that after like 5 hours of non stop riding it randomly shut down and they couldn't kick start it (or push start it). After kicking some ass for a couple days and feeling sorry for myself for letting them take it I start tearing her apart.
First thing I notice is that it really wont turn over at all. Second when I took the right exhaust pipe off there was metal shavings inside it =(. I get down to the cylinders and they appear fine, on the head there are marks and on the pistons, but very minor. I thought it was maybe the rings, but no luck. My right side crank bearing let go.
What do you think, was the primary cause? Poor oil/fuel mixture? Riding 5 hours straight or the combo of both?
Now that its all apart what do I do? I know I need at least the crank, but while I have it apart does it make sense to bore it and put new pistons in? What kind of crank should I get?
Any help is much appreciated