If its the same cylinder and piston coming back together but new piston rings.. do they need break in .. or more or less ready to race ! :-D ..
I would of corse start it .. let it idle for 10min.. take it for a spin.. nice and easy and then throttle it.. or is there a need for much more break in..
I would of corse start it .. let it idle for 10min.. take it for a spin.. nice and easy and then throttle it.. or is there a need for much more break in..