NGK spark plugs: high quality at a reasonable price, since NGK provides OEM items for the Japanese motorcycle industry.
You may also be interested in the following product(s)
BGSWire brush (set of 3)
Hi-Q Toolsspark plug wrench for 18/21mm, 150mm
Baas BikepartsSilicon ignition cable black (1 meter)
NGKspark plug for 14mm SB05F straight 94mm
NGKignition cable connector 8739 J1 black