85 Avenger > stock Cast Head & 3pt spark plug

GruBee Inc


Stock 85A head with Z4JC 3pt. spark plug.

Expert engine builders have determined that the stock cast head is OK, but a more robust material and size is more desirable for higher compression and better cooling. ie: CNC Billet HP Head.   

However, this stock head comes with the engine, so we have decided to sell it separately to please those who do not want it.  See the pics.   

A 3-point side electrode spark plug is more desirable for 2 stroke engines than is a single center electrode that runs hotter and creates higher resistance with less exposure to the compressed air fuel mix.