hi all, i need some help, i rode my 2001 gp1200r over the weekend and it suddenly cut out on me, it started again but would not rev over 4000rpm, and sounded like it had a misfire. i took it to the yamaha dealer who did a compression test and said the 1st cylinder was only showing 40psi, the other 2 were at 110psi. he recommended a complete engine rebuild, both top end and bottom end, ie new pistons and a new cranckshaft. does this sound like the correct advice and would i need to do both? the mechanic said i could just to the pistons but more than likely in a month or two the crankshaft would break as well, if i dont replace the crankshaft at the same time? any advice would be greatly apreciated, thanks