First...   Choose the Baja Motorsports Bike Model that you have.

Baja Parts Diagrams
Baja Motorsports
(Hensim) Doodle Bug 96cc (VIN LUAH) Mini Bike | (Qunshe) Doodle bug 2.5hp (VIN PREFIX L4GS) Mini Bike | (Hensim) Mini Baja MB165, HT65 (VIN PREFIX LUAH) Mini Bike | (Wenling) Mini Baja MB165,MB165C,HT65(ALL OTHER VIN PREFIXES) Mini Bike | DR49 (Hensim) Dirt Runner 49cc (VIN PREFIX LUAH) Dirt Bike | DR50 (Hensim) Dirt Runner 49cc (VIN PREFIX LLCH or L) Dirt Bike | DR70 (Hensim) Dirt Runner 70cc (VIN PREFIX LUAH) Dirt Bike | DR90 (Hensim) Dirt Runner 90cc (VIN PREFIX LLCH or L) Dirt Bike | DR125 and DR150 (Hensim) Dirt Runner 125cc and 150cc Dirt Bike | DX70 KC Dirt Extreme 70cc Dirt Bike | DX110 KC Dirt Extreme 110cc Dirt Bike | SSR200 Zongshen 200cc (VIN PREVIX LZSJ) Dirt Bike | X250 Xmoto Extreme 250cc Dirt Bike | RT50 (HSun) Retro 50cc (VIN PREFIX LWGT) Scooter | SC50 (HSun) Sun City 50cc (VIN PREFIX LWGT) Scooter | SC50 (Qj) Sun City 50cc (VIN PREFIX LAWT and LXKS) Scooter | SC125 (Zongshen) Sun City 125cc Scooter (VIN PREFIX LZST) Scooter | SC150 (HSun) 150cc Street Scooter | RT150 (Zongneng) Retro 150CC Scooter | BE500 (Qunsheng) Baja Electric 500watt Scooter | MC125 Hi Bird 125cc (VIN PREFIX LSRN) Street Bike | BV250 Tank 250cc Street Bike | PX250 (Fym) Phoenix 250cc (VIN PREFIX LE8P) Street Bike