I recently acquired an early model U speeditwin 20hp. It appears to be heavily tampered with as the connecting rod end cap bolts were lose and missing their safety wire. The roller bearings appear intact and undamaged but seem very loose on the crank journal even when tightened properly. The pistons, while the correct bore size appear to be incorrect for the engine, as the piston head is not positioned properly in relation to the intake port (90 degrees off). With that said, can anybody help provide any information on finding correct parts, diagrams, or anything that can help me in getting this machine in working order. Thank you.