ZARKO 140cc 4-Stroke Racing Engine Motor with Manual Clutch Electric Start, Horizontal Pit Dirt Bike Engine for CRF50 CRF70 XR50 XR70 Z50 CT70 ATC70 Monkey SSR125 Taotao Coolster DB14 DB17

High-Performance 140cc Racing Engine: 4-stroke horizontal motor with 4-speed manual clutch and 0-neutral-1-2-3-4 configuration for aggressive acceleration and track-ready power.

Electric Start + Kick Backup: Dual starting configuration ensures dependable ignition in variable temperature and terrain environments.

Manual Clutch Control Response: Designed for riders seeking competitive throttle modulation, drift control, clutch pop starts, and precision shifting.

Direct Fit Frame Geometry: Standard 6 inch (154 mm) mounting bolt spacing fits popular pit bikes, Honda-based mini trail frames, and most Chinese clone chassis.

Complete Installation Kit Included: Engine arrives with intake manifold, gear shift lever, kick starter lever, and engine side cover—ideal for complete rebuilds and engine swaps.