Spark Plug for Hammerhead Off-Road GY6 Go-Kart Engines

Description:

This spark plug for Hammerhead Off-Road GY6 go-kart engines is the NGK C7HSA, and it is a non-resistor type. It may be used on many full size scooter engines as well as many classic Honda scooters, motorcycles, and motorbikes. It may also be found providing the spark to a number of off-road go-karts that use the ubiquitous GY6 engine.

This is a direct replacement part for NGK's A7RTC spark plug. Sold without a terminal nut.

Do I need a NGK C7HSA or CR7HSA?
Although there is no dimensional or spark output difference between the NGK C7HSA and the NGK CR7HSA plug, the CR7HSA uses an internal resistor. Radio frequency interference (RFI) caused by the spark "jumping the gap" can negatively effect the systems on some modern scooters and motorcycles that have computer controlled ignition or fuel injection systems.

Some aftermarket ignition modules are especially sensitive to RFI; the most affected are the modules produced by DynaTech. Using resistor type spark plugs such as the NGK CR7HSA will eliminate any RFI troubles. If your go-kart doesn't have a computerized module, then either the resistor type or the non-resistor type will work equally well.