Sophisticated and expensive stroker in full blown race replica mode. Rather silly in 12hp form with a chassis that makes little sense below 70mph, but examples have been tuned to around 30 horses without exploding. Usual learner abuse and exuberance, crash-repaired examples out there that could turn out both expensive and deadly. Signs of an engine on the way out are rattles, knocks, excess of smoke and a stuttering flow of power.