this is my 140cc chinese pit bike engine, has a problem with slipping into neutral. i believe this is my issue it looks like it's meant to live in a groove underneath,
2nd gear pops into neutral between 6000-8000 RPM, CBR600F4 - CBR Forum - Enthusiast forums for Honda CBR Owners
Kawasaki Ninja 400 / Z400 Clutch Slipping, Poor Shifting, False Neutrals, and Dropping Gears - Explained and Fixed!