POST 7: Blue bike; Rebuilding the motor and transmission
I hadn't planned on doing this rebuild although the possibility must be always on the cards when you buy a bike of unknown history like this. Gasket sets were easy enough to locate on ebay, although bearings and oil seals are not available as sets. I needed: For the cover: Kickstart oil seal 16x28x7 For the transmission case: Final drive bearing 6203uu double shielded bearing Final drive oil seal 24x4x7 Crankshaft oil seal 15x25.5x7 Crank bearing 6004 unshielded 20x42x12 Oil pump O ring 18.5x2.2 I also bought new 12x17 shim washers in 1mm and 0.5mm thicknesses, and new 12x22 stainless steel wave washers but these will need machining to 17mm OD. For the crankcase: Crankshaft oil seal 15x25.5x7 Crank bearing 6004 unshielded 20x42x12 I also bought a new small end bearing I started with the small final drive in the transmission case and levered out the oil seal towards the inside of the case. This exosed the final drive bearing. I pressed the bearing out, also towards the ...