Anybody who’s looking for an extremely light and agile two-stroke cross bike that’s got so much power it makes even four-strokes eat its dust… can stop looking! And the 125 SX shows its MX2 competitors the ropes on more than the racecourse. An optimised chassis, fierce from the first second all the way to the finish line – the ultimate small two-stroke that can totally take on the big guys.

Technical Data

Engine Engine type Single cylinder, 2-stroke Displacement 124.8 cc Bore x stroke 54 x 54.5 mm (2.13 x 2.15") Starter Kickstarter Transmission 6 gears Carburetor Keihin PWK 39 Control TVC power valve Lubrication Mixture oil lubrication 1:40 Transmission lubrication 15W50 Primary drive 23:73 Final drive 13:50 Cooling Liquid cooled Clutch Wet multi-disc clutch, operated hydraulically Ignition Kokusan digital magneto CDI

Chassis Frame Central double-cradle-type 25CrMo4 Subframe Aluminium 7020 Handlebar Renthal Aluminium Ø 28/22 mm (1.10/0.87") Front suspension WP USD Ø 43 mm (1.69") Rear suspension WP monoshock PDS Suspension travel front / rear 300 / 335 mm (11.81 / 13.19") Brakes, front / rear Disc brakes 260 / 220 mm (10.24 / 8.66") Rims, front / rear 1.60 x 21"; 2.15 x 19" Tires, front / rear 80/100-21"; 100/90-19" Chain 5/8 x 1/4" Main silencer Aluminium Steering head angle 63° Wheel base 1471±10 mm (57.91±0.39") Ground clearance (unloaded) 390 mm (15.35") Seat height 925 mm (36.42") Fuel capacity approx. 7.5 liters (2 gal) Weight (no fuel) approx. 90.8 kg (200.2 lbs)