R series two-stroke engine

CHUNG YANG R series engines include models 23/26/27/29/42/46, which are designed with one or two-hole screw-fixed cylinders. CHUNG YANG F series engines include models 23/26/27/29. CHUNG YANG YANG F water-cooled series engines include models 263/273, and are equipped with Japanese Walbro carburetors and CHUNG YANG specially designed clutches. It can be directly installed on the standard 1/5 remote control car, and after modification it can be suitable for extreme sports powered skateboards and powered scooters.

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Specifications
model CY225 R230 R260 R263W R270 R290 L290 R420 R460
Cooling method Air Cooling Air Cooling Air Cooling Water Cooling Air Cooling        
Displacement (cc) 22.5 22.5 25.4 26.9 26.9 28.5 28.5 41.5 45.7
Diameter(mm) 32 32 34 35 35 36 36 40 42
Stroke(mm) 28 28 28 28 28 28 28 33 33
Maximum output (PS/rpm) 0.9/7500 2.2/11500 2.6/11500 2.6/11000 2.7/11000 2.9/11000 2.3/10000 4.0/11000 4.3/11000
Maximum torque (kg-m/rpm) 0.095/5500 0.145/9500 0.151/9500 0.157/9250 0.157/9250 0.163/9250 0.175/7500 0.33/8000 0.322/9000
Minimum fuel consumption (g/PS.H) 580 550 480 400 470 470 420 360 350
Maximum load speed (rpm) 11000 19500 19000 18000 18000 18000 16000 18000 18000
Compression ratio 6.0 9.2 9.5 9.5 9.5 9.5 9.5 8.8 9.2
Recommended fuel (octane number) 92~95
Recommended two-stroke oil FC grade two-stroke engine oil
Mixture ratio (gasoline: two-stroke oil) (Premixed gasoline: two-stroke engine oil) 25:1
Ignition method TDI
Carburetor Wlq WT HAD
spark plug NGK:BPM6A NGK:CMR7H
Startup method Hand pull start
Overall size (L*W*H) mm 159×232×218 168×150×197 168×150×197 175×155×203 168×150×197 168×150×197 168×150×197 277×244.5×228 186×277×228
Weight KG 2.5 2.56 2.56 1.7 2.56 2.56 2.56 3.76 3.76