If anyone has an engine apart I'm after some information to set the primary gar backlash. On the primary drive (crank) gear and the driven (clutch) gear there are hand engraved numbers, (front of drive gear, back of driven) what I need to know is what are the numbers marked on your gears to find the figure Yamaha is using at the factory to set up gear backlash. thanks (this should help explain it)