ok, it is a long story, ok at about 3000 miles my sled blewup and took the whole motor out i bought new case halfs, pistons, rods, heads were fine, ah a used but good cylinder and the other was fine, and had to put a new pto end on crank i had cranky joe out of spokane washington do the crank work and we did the wide bearing kit he pressed them on and put newer pto end on, at this time i also got rid of oil injection and cranky joe drilled out the case for oil to get to the bearings, and i put it all back together and i rode it for about a half a season and parked it for the summer and summerized it, i go it out the next winter and took it up for a short little test ride and went about 10 miles and blew up again took it home took it apart and it was the two bearings on the pto side on the crank, i took it to cranky joe again and he said i dont know and so he put two new bearings on and the cases did get a little scarred from that but he said it was ok so i put it together and went up and rode it for about 8 miles and it went again, took it apart and it was the bearings i took it back again and he said i dont know he said well we could try different cases and he put new bearings on and i switched cases, put it back together and rode it for most of this last season and it was running good, and close to the end of the season i was riding back to the truck and it was making a real loud vibrating noice and took it apart and wat do u no it was the bearings again, so now it is sitting in my garage in pieces. after the second time i took the cases and got the oil port porteed out some more thinking maybe it wasnt getting enough oil and then when i switched cases the ones i switched to was drilled a little different to just see if that changed anything, and the only other thing i can think of is the clutch, the three years i have had the sled i have done nothing to the clutch, which is probably a stupid move and is probably what my problem is, what does anybody else think of this. whoever reads this is probably thinking im a retard, but i dont know what to do. so any help or comments or anything would help, thanks.