just checked the OD of the flywheels today and the 470 has another 1.75mm on the flywheels than the 400.
so although we think that they're the same - they're NOT!
it's just a little extra metal trying to help keep it all balances that's all.
BTW, anybody made a home made flywheel...
Counter balancer slightly out? Vibrates abit at high revs not sure if it is normal or not cause i have changed gearing straight after rebuild? Went from 16/45 to 15/45.