Take out the pinch bolt and tap a screw driver into the split line to spread it and it will slide off easily. Use a piece of flat wood to tap the end of the axle even if using a mallet, very easy to bend the end of an axle. The axle needs to be free of any high metal a small fine file followed by fine sand paper works then clean it good. Don’t hone a hole with a keyway.
FAA certified jet engine and aircraft technician,
Nicholson Speedway class champion 2001,
Yamaha KT100 Service Center,
41 years karting experience