hi all, i too have had problem running the engines in.
and also to go well.
ive had loads of rossi engines and they all seem to go great, with out much messing about with them.
i understand they take a long time to run in, but ive already got sick of it .
they just dond seemed to have the pulling power or pace of the nova
maybe its just gearing ive got a serpent 710.
we run 16% fuel in the uk so ive also taken a head shim out and tryed all sorts of plugs long and short .
any idears deno?