Pit Bikes Lifan & Zongshen Petrol (1990-2016) Haynes Online Manual

What's covered:
Pit bikes with 4-stroke air-cooled horizontal (lay-down) engines
Applicable brands:
Stomp, WPB, Demon-X, LMX, M2R, Slam, Thumpstar, SSR, Orion, YCF, PitsterPro, Piranha, G2 Moto, Coolster, Motovert
Engine types covered in detail:
Lifan 110cc 1P52FMH with semi-automatic gearbox
Lifan 120cc 1P52FMI
Lifan YX140 140cc 1P56FMJ
Zongshen ZS155 1P60YMJ