4-Pin CDI Computer Brain Unit – For 50cc-125cc ATV, Go Kart, Baja, Yamoto

If your small engine ATV, dirt bike, or go-kart isn't sparking, the CDI box (the 'brain unit') could be fried.

This is a new, 4-pin CDI module from Fellers Small Engines.

It fits a wide range of 50cc, 70cc, 90cc, 110cc, and 125cc engines commonly found in Chinese and smaller ATVs, go-karts, and mini bikes like Bajas and Yamotos.

It's a simple plug-and-play replacement in most cases.

Just unplug the old one and pop this in.

It's a common repair part.

California has a Prop 65 warning, but that's standard for these.

Get that little engine running again.