Originally Posted by
Riketsu
I would always recommend to pre-heat an engine before starting it up. Be it CRF, Picco or Novarossi. It helps the rod maintain its life since your reducing the stresses created on it.
Is it normal if when i carefully slowly turn the cranksharft it gets hard when the piston is at the top of the exhaust port.? But i didn't turn it any further to evoid damage.