I recently scored a nice, original '72 Yamaha RT2 enduro. It just needs a rebore and piston, but I can't find the piston clearance spec anywhere online. I'll buy a shop manual for the bike soon, but until then I'd really like to be able to tell my machinist what clearance it needs. Does anyone here have a manual for an RT2 or RT3 that could look it up? I could use head bolt torques, too. Thanks a lot. If anyone has a scanned copy of a manual available, that would be even better.