Applications :
Honda : CR80R/125R/250R/450R/480R/500R, XL80/100/100S/170, XR100/100R, XR50/CRF50 00-04, FL250, ATC70/110 (CDI ONLY), ATC185/ 250R, TRX250R 86-89, TRX90 93-00, TRX70/125 & EARLY 50cc. 
Kawasaki : KD/KX/KDX80, KM100, KS100, KS125 & most two-stroke external flywheel models and earlier point-type ignitions.
Suzuki : Quad Racers, 125/160EK/250R, DR100/125/200, DS80, ALT185, 50-125cc Trail & Street models & most late model RMs.
Yamaha : Most single cylinder off-road, enduro, MX, YZ & Quads with external flywheels 1968 & later, BW80, RIVA50, PW50, RZ350, TT500, XT500, YFM80/100/200/225, YFS200, YFZ350, YSR50, YT125/175 & YZ400F, YZ450F.
KTM : 65SX 99-04, 85SX 04, 105SX 04, 200 EXC/MXC 98-05, 125/250 SX/EXC/MXC 98-05 & 250/300/380 SX/EXC/MXC 97-05.