RFN Warrior SX-E700 Kids Electric MX Motocross Bike 14" Wheel - Blue/Red Crankshafts it is the connection between

it is the connection between the engine and the rear wheel

The Euro light switch type will need the light switch modifying ( see PDF diagram above )

The POLINI Airbox improves the performance

Liberty 125/150

RFN Warrior SX-E700 Kids Electric MX Motocross Bike 14" Wheel - Blue/Red Crankshafts it is the connection betweenRFN Warrior SX E700 Kids Electric MX Motocross Bike 14" Wheel Blue Red More Power, More Speed, More Range, Improved Handling, the new SX E700 series brings significant upgrades over the standard SX E series! A powerful 36V electric bike with 14 MX tyres for kids aged 4 8. Built for off road adventures, it delivers 15. 5 miles or 1 hour of riding in Eco Mode, with more power unlocked as confidence grows. Designed to tackle grass, mud, and dirt, it