mikeyc

Thank you very much Mike

Can somebody give me the torque specs for cylinder and head on a 74 TY250 motor? Thank you Mike

Thank you very much for the info,The bottom end checks out OK.I have rebuilt a few motors when I was younger but I seem to be getting really paranoid about things as I get older.I am gonna just bore it,new rings,bearing,pin and run it.

What about side to side slop with the rod? Is that not important? Thanks Mike

No,the cylinder is in good shape but I figured being that old I would bring it back to spec.It's only 30.00 for boring and I have a nice round cylinder.I am not sure how to check the crank,There dosnt seem to be any up/down play.Is it ok to replace the rod bearings and not the rod? I really want tthis motor to be right so I dont have to tare it down for another 10 years.I have never had this bike running so I dont know the history of the motor,I would guess it was sitting for a good 6 years.

I have a 1974 TY250 that I recently bought and before I started the bike I pulled the cylinder off.I found the piston which is standard bore was cracked.I bought a new piston 1st oversize and was going to replace the bearings on the crank.Is it a good idea to use the stock rod and replace the rod bearings or should I buy a new rod? Is there a way to tell if the low end is good or bad besides the obvious? Thanks for any help Mike