Gear transmission D-N-R for chinese engine 110cc to 125cc

for  automatic motor with reverse 50 to 150 cc 31 tooth and 29 tooth

for atv taotao,apollo and other model

Shift - automatic + reverse l, electric start, 1 + 1. Commonly referred to as "gear transmission set" or "gearbox set". Most often (but not exclusively) applicable to 125cc motorcycles '1 + 1' dirt configuration, ATVs, buggies and go karts as well as other motorized sports and mobility products.