F series two-stroke engine

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Specifications
model F230 F260 F270 F290 R420 R460 F263 F273
Cooling method Air Cooling Air Cooling Air Cooling Air Cooling Air Cooling Air Cooling Water-cooled Water-cooled
Displacement (cc) 22.5 25.4 27.2 28.5 41.5 45.7 25.4 27.2
Diameter(mm) 32 34 34 36 40 42 34 34
Stroke(mm) 28 28 30 28 33 33 28 30
Maximum output (PS/rpm) 2.5/13500 2.6/13500 2.8/13500 2.9/13000 4.0/11000 4.3/11000 3.75/13500 3.7/114000
Maximum torque (kg-m/rpm) 0.154/10000 0.155/11000 0.17/11000 0.188/9500 0.33/8000 0.322/9000 0.2/12000 0.2/12500
Minimum fuel consumption (g/PS.H) 　 　 　 　 360 350 500 500
Maximum load speed (rpm) 　 　 20000 20000 18000 18000 20000 20000
Compression ratio 9.5 9.5 9.5 10.5 8.8 9.2 9.5 9.5
Recommended fuel (octane number) 92～95 92～95 92～95 95 and above 92～95 92～95 92～95 92～95
Recommended two-stroke oil FC level FC level FC level FC level 　 　 FC level FC level
Mixture ratio (gasoline: two-stroke oil) 25:1 25:1 25:1 25:1 25:1 25:1 25:1 25:1
Ignition method TDI TDI TDI TDI TDI TDI TDI TDI
Carburetor WT-668 WT-668 WT-668 WT-668 HAD WT-771 WT-771
spark plug NGK:CMR7H NGK:CMR7H NGK:CMR7H NGK:CMR7H NGK:CMR7H NGK:CMR7H NGK:CMR7H/CR8HVX(for competition) NGK:CMR7H/CR8HVX(for competition)
Startup method Hand pull start Hand pull start Hand pull start Hand pull start Recoil Recoil Hand pull start Hand pull start
Overall size (L*W*H) mm 158×240×199 158×240×199 158×240×199 158×240×199 277×244.5×228 186×277×228 175×182×203 175×182×203
Weight KG 2.24 2.24 2.24 2.24 3.76 3.76 1.7 1.7
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