Out for a scratch yesterday,all was going so well until the motor stops while
flat out in fifth gear. I coasted to a stop and tried the kickstart,yes it was locked solid I pulled the lower plug,and it was very "white looking"!Got the bike home and removed the top end,expecting damage,but it all looks fine.The upper plug was in the same condition as the top one.I cannot rotate the crank ! There was nothing suspect came out when I flushed the case.Doesn't look good does it Would a weak mixture break the crankshaft? And not cause cylinder damage?