Originally Posted by Shaco
Why is this happening, what could be wrong with the engine?
Update (26.09.2012 22:08)..
We have not yet opened the cover, but we just read the manual, which says: "Degrease the thread of the crankshaft and coat it with Loctite 243. Mount the collar nut and tighten to 150Nm."
Friend did not use Loctite and says he tighted it to about 80Nm (as he did not have the manual at the first time). So tommorrow we will probably see if this is the problem again.
He says that I should be happy because the engine instantly stucked/wedged and so no sprockets were damaged.
Check the shift drum locking lever and also drop your oil and pull the screens to see if there are any bits of metal in them.