Leaderboard

The gear marked #3 in the diagram should turn freely in one direction, but not in the other direction. If it won't turn in either direction, you've found the problem. There's a one way clutch or bearing that will allow the gear #3 to spin freely in one direction, but the opposite direction is what starts the engine. The starter gear stays meshed with gear #3. Does the starter spin at all? It may be spinning in the wrong direction. Ask me how I know 😡. If you can get something into the hole that houses the gear #3 besides your finger, such as a screwdriver, try to spin that gear using that. If you still can't get the gear to spin in either direction, you'll most likely have to replace the one way bearing.

you'll have to get the axle nut off first. 1 1/16" If i remember right. the trick to getting the stuck drums off on these 550's is pb blaster,a hammer, and patience. also wouldn't hurt to open the bleeder on the back of the wheel cylinder to relieve any pressure.. spray the PBlaster between the drum and backing plate, let it sit and soak, and moderately tap around the drum, mainly focusing on the area around the cylinder... patience is KEY.