Cogs didnt suffer , the clutch we beefed up with extra plates , billett basket and haevier springs . the real problem was the kickstarter . we broke about six of them , till we changed to 180 degrees . From then on it was different motorcycle . But it was not so easy with a1 3 spline crank . Today I would try for 270 degrees, but in those days there where no 270 degree ignations .