i have 05 900 just got the engine done piston slap was the prob it ran good. then i cut the head down .010, then stacked the cyls the sqash be for the rebuild was .090 never checked it yet running race fuel, it also has slp pipe/can and code now the engine light is flashing at 7900 rpm. would i have to get my ecu reprogamed for the work that was done. thanxs for the help and sorry for the life long story :crazy:

i have 05 900 just got the engine done piston slap was the prob it ran good. then i cut the head down .010, then stacked the cyls the sqash be for the rebuild was .090 never checked it yet running race fuel, it also has slp pipe/can and code now the engine light is flashing at 7900 rpm. would i have to get my ecu reprogamed for the work that was done. thanxs for the help and sorry for the life long story :crazy:[/b]

The engine light you see flashing, Is it the D.E.T. light telling you that the motor is detonating and retarding the spark?