Ultra-high rpm, 149 cc engine is one of the most advanced in the sport, its unique 4-valve, Unicam design gives it very compact dimensions and excellent mass centralization for effortless direction changes on the ground or altitude changes in the air. Rail it or whip it with confidence.
Power when you want it
Short-skirted piston and light flywheel mean the CRF’s willing engine builds revs very quickly – no waiting for the power to “hit”.
Consistent engine operating temperature
Liquid cooling and a Nikasil cylinder liner help to extend engine life. The cooling system’s lightweight aluminum radiator helps to reduce weight and ensure consistent engine operating temperature no matter how hard you push.
More immediate throttle
Flat-slide, FCR 32 mm carburetor is fitted with an accelerator pump for more immediate throttle response. Go ahead, use the 4-stroke advantage to grab the holeshot.
Less shifting more enjoyment
Broad 4-stroke power characteristics allow the CRF150RB to use a five-speed gearbox for less shifting so you can concentrate on your riding.
Easy start from hot or cold
Although the 4-stroke engine is hard to stall, it’s nice to know that an automatic decompression system makes starting easy, hot or cold.
Maximum power output
Maintenance-free digital CD ignition system includes a throttle angle sensor so it can tailor the ignition curve to provide maximum power output whenever you grab that throttle.
Increased durability & maximum control
Heavy-duty clutch is fitted with tough friction plates for increased durability but retains a light pull at the lever giving you maximum control.
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Engine & Drivetrain
Liquid-cooled single-cylinder 4-stroke
Bore & stroke
66 mm x 43.7 mm
Unicam, 4 valves
Keihin 32 mm flat-slide carb with throttle position sensor
#420 O-ring-sealed chain, 15T/56T
Chassis & Suspension
37 mm fully adjustable inverted Showa cartridge fork; 275 mm (10.8 in.) travel
Pro-Link fully adjustable Showa single shock; 242 mm (10.7 in.) travel
Dimensions & Additional Information
Front: 70/100 - 17; Rear: 90/100 - 14
Front: 220 mm disc with dual-piston caliper; Rear 190 mm disc
302 mm (11.9 in.)
833 mm (32.8 in.)
1,260 mm (49.6 in.)
84 kg (185 lbs.) including required fluids and full tank of gas - ready to ride