Specifications:
100% brand new and high-quality ignition coil + CDI box + spark plug.
For XR50 XR70 XR80 XR100 / CRF50 CRF70 CRF80 CRF100.
Fits GY6 50cc-90cc, 110cc, 125cc, 150cc 4-stroke engines.
For most motorcycle, atv, quad, scooter, go kart, moped, pit bike, dirt bike, racing bike and other bikes.
Fits most Chinese import Pit / Dirt bikes, almost all of the bike brands from China, such as TaoTao, Buyang, Coolsport, Jonway, Znen, NST, BMX, Kazuma, Sunl, Roketa, AIM-EX etc.
Package includes: 1 x ignition coil. 1 x CDI box. 1 x spark plug.
Ignition coil feature:
Wire Length: 16inch / 40cm.
Overall Length: 19inch / 50cm.
Fits models: GY6 QMJ/QMI157, QMJ/QMI152 4-stroke engines.
This coil can improve combustion efficiency, strengthen electrical performance.
CDI box feature:
Material: aluminum.
Connector: AC, 6 Pin male plug.
Wire + plug length: 160mm.
CDI dimension: 70 x 38 x 30mm(L x W x H).
For GY6 139QMB, 152QMI and 157QMJ engines.
Spark plug feature:
Models: A7TC.
Hex size: 5/8 inch.
Over length: about 69mm.
Thread diameter: 10mm.
Thread length: about 12.5mm.
Fits models: GY6 50cc-150cc engines, 50cc-125cc horizontal engines.
Mechanics note on distinguishing AC fired or DC fired CDI box:
1. In the GY6 6-plug set-up, you have AC if you have 3-wires going into the 4-plug side and you have 2-wires going into the 2-plug side. On the other hand, you have DC if you have the larger CDI box, 3 or 4 wires going into the 4-plug side and only 1 wire going into the 2-plug side.
2. In general, the DC CDI's tend to be larger in size than the AC ones. For example, the common AC fired CDI box is length 65 x width 36 x height 22 mm or length 58 x width 33 x height 22 mm, but common DC fired CDI box is larger than AC fired cdi box in size, suze as length 75 x width 42 x height 24 mm or length 96 x width 55 x height 24 mm. (don't include the racing cdi box size)
3. If the headlights turn on without the engine running(with just the key on), it is a DC system. In the AC system the headlight requires the engine to be running, another indication is, if the engine will only run with a battery it is DC. If it will run without a battery, it is a AC system.