I'm assuming you mean the main gears that transmit power from the crankshaft to the clutch. The clutch basket with the large gear can be easily replaced but I'm not sure what he intends to do about the crank gear. I haven't seen that particular crankshaft but they are usually part of the crankshaft, shrunk fit on at the foundry. Ask him how he can repair that. The motor needs to be torn down, you definitely don't want pieces floating around in there. At the very least the cases will need to be separated to clean out any remaining metal shavings\pieces. The main-shaft and crankshaft bearings need to be checked to make sure that wasn't the cause and make sure they weren't damaged during the lockup (the connecting rod\pistons should be checked as well). A seizure under power like that is very hard on engine components.
In short the motor can be rebuilt but it will need a lot of work and in your case that means money. Until I understand how he is going to repair the gear on the crank I can't say yea or nay on the first mechanic. Keep in mind he would likely split the cases and remove the crankshaft to preform whatever repair he does and would clean out any debris and could be asked to check the bearings. The second mechanic's option would work but is expensive like you know. There is a third option and the one I would likely use in this case. Look around, see if you can find a running engine or parts bike with a good motor to swap in. As long as the guts of the donor motor are good you can just swap missing components like the carbs, starter, or even the entire head over from your current damaged motor. You could even bring your mechanic a damaged engine and as long as the crank is still good he can just swap that. Your dad is right and wrong, any remaining teeth\metal pieces need to be cleaned out from the motor but that's not worth junking it over. Even as is the motor is still worth quite a bit to someone else as I just explained. I hope that helps, ask if you have any more questions, Matt -- You received this message because you are subscribed to the Google Groups "Nighthawk Motorcycle Lovers!" group. To post to this group, send email to nighthawk_lov...@googlegroups.com. To unsubscribe from this group, send email to nighthawk_lovers+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/nighthawk_lovers?hl=en.
