The 50cc 4-stroke auto-clutch Honda-clone gas ATV and dirt bike engine uses a unique semi-automatic clutch mechanism. Known as an auto-clutch, there is no clutch lever to deploy; the rider simply lets off of the throttle and shifts manually.
This Honda-clone engine may be used in a wide variety of applications, including terrain vehicles (ATVs), dirt bikes, pit bikes, go karts, and dune buggies.
There are many different versions of 50cc GY6 style 4-stroke engines used in the Chinese scooter, all-terrain vehicle, dirt bike, and go kart market. Please be sure to check the detailed specifications and dimensions on our specifications page (tab titled "Specs") prior to ordering.
Please use these dimensions to verify that this engine will fit your ATV or bike prior to ordering!
Note: These specifications are applicable to the dimensionally identical automatic version of this engine. Minor details may vary.
Engine Type: Single Cylinder 4-Stroke
Cooling: Air Cooled
Bore and stroke (mm): 38.8/41.4
Compression Ratio: 7.2:1
Max Power (kw/RPM): 2.0/7500
Max Torque (N.m/RPM): 3.0/7500
Nominal Power/Speed (kw/RPM): 2/7000 ±500
No Load Speed (RPM): 1500 ±100
Spark Plug: A7TC
Spark Plug Gap (mm): 0.6-0.7
Lower Engine Mounts: 11cm
Lower Mounting Bracket Through Hole Diameter: .04"
Center to Center Exhaust Mounting Bolts: 50mm
Lower Secondary Mounting Bracket: 108mm
Lower Secondary Mounting Bracket Through Hole Diameter: .337"
Upper Engine Mount Through Hole Diameter: .315"
Overall Length: 25"
Width: 13.5" (Not including kick starter)
Height From Bottom Mounting Bracket to Top Air Intake: 11.25"
Treaded Drive Shaft: 3cm
Honda CRF50 50cc Dirt Bike Parts
2.5-10 Rear Tire & Tube Set for the Baja Dirt Runner 49, Honda CRF50, Motovox MVX70, & Razor MX500/MX650
| 2.50-10 Dirt Bike Tire for the Baja Dirt Runner 49, Honda CRF50, & Motovox MVX70
| 2.75/3.00-10 (90/65-10) Inner Tube for the Baja Dirt Runner 49, Honda CRF50, Motovox MVX70, & Razor MX500/MX650
| 2.50-10 K760 Trakmaster II Dirt Bike Tire (Kenda)
| 10" Front Rim for the 50cc Baja Dirt Runner 49 (DR49) Dirt Bike
| 50cc 4-Stroke Auto-Clutch Honda-Clone ATV & Dirt Bike Engine
| 50cc, 70cc, 90cc, 110cc, 125cc "Honda Style" Carburetor with 19 mm Intake and Left Side Manual Choke
| 35mm Air Filter for 49cc, 50cc, 70cc, 90cc, 110cc, & 125cc/150cc Dirt Bikes
| Front Brake Shoes for Baja Dirt Runner 49 (DR49)
| Rear Brake Shoes for Baja Dirt Runner 49 (DR49)
| View More ...