Honda CG125 MPH to RPM
Front Disc Brake Model (2004 on)
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Gear 1 2 3 4 5 mph rpm 5 2129 1324 978 801 680 10 4257 2648 1957 1601 1360 15 6386 3972 2935 2402 2040 20 8515 5296 3913 3203 2720 25 10644 6619 4892 4004 3400 30 7943 5870 4804 4080 35 9267 6849 5605 4760 40 10591 7827 6406 5440 45 8805 7207 6120 50 9784 8007 6800 55 10762 8808 7480 60 9609 8160 65 10410 8840 70 9520 75 10200 80 10880
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Gear (% = Gear Gap) 1 2 3 4 5 rpm 37.8% 26.1% 18.2% 15.1% mph 7000 16.4 26.4 35.8 43.7 51.5 8000 18.8 30.2 40.9 50.0 58.8 9000 21.1 34.0 46.0 56.2 66.2
3500 8.2 13.2 17.9 21.9 25.7 4000 9.4 15.1 20.4 25.0 29.4 4500 10.6 17.0 23.0 28.1 33.1 5000 11.7 18.9 25.6 31.2 36.8 5500 12.9 20.8 28.1 34.3 40.4 6000 14.1 22.7 30.7 37.5 44.1 6500 15.3 24.5 33.2 40.6 47.8 7000 16.4 26.4 35.8 43.7 51.5 7500 17.6 28.3 38.3 46.8 55.1 8000 18.8 30.2 40.9 50.0 58.8 8500 20.0 32.1 43.4 53.1 62.5 9000 21.1 34.0 46.0 56.2 66.2 9500 22.3 35.9 48.6 59.3 69.9 10000 23.5 37.8 51.1 62.4 73.5 10500 24.7 39.7 53.7 65.6 77.2 11000 25.8 41.5 56.2 68.7 80.9 |
5500 rpm is my advised warming up speed. It's also the maximum speed I would run a new engine in.
It probably takes 3.5 to 5 miles to warm up, dependant on outside temperature.
I would not go past peak power, the engines power will dramatically drop off above this and increase engine wear.
If you use the bike above 7000rpm (51mph 5th Gear), see the Important Spark Plug Information (extended high speed riding part) and Which Oil quality to use in the Servicing page. |
Peak Torque = 7000 rpm, Peak Power = 9000 rpm, Generator Full Power = 5000 rpm
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Front Disc Brake model (2005) Test Ride, flat out
3rd = 55mph 4th = 60 / 62mph (downhill, headwind) 5th = 60mph (same headwind)
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Pre 2004 CG 125 version with max speed indicators on speedometer for every gear
5th = 70mph 4th = 58mph 3rd = 45mph
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Pre 2004 kilometres version with max speed indicators on speedometer for every gear Gear km/h mph 1 30 18.6 2 50 31.1 3 70 43.5 4 90 55.9 5 110 68.3 Peak Torque 7000 rpm, Peak Power 8500 rpm |