Engine SpecificationsBore Stroke: 48.0 mm (1.890 in.) x 46.8 mm (1.843 in.)
Compression Ratio: 9.5/10.9 : 1
Engine: 84.7 cc (5.2 cu.in.), 2-stroke, liquid-cooled
Fuel System: KEIHIN PE28, single
Ignition: Electronic ignition (CDI)
Lubrication: Fuel/oil premixture of 30 : 1
Starter: Primary kick
Engine FeaturesHigh-revving 84.7cc, liquid-cooled, case-reed engine produces strong peak power and torque - includes aluminum exhaust valves for more stable exhaust flow and exhaust valve governor and linkage for precise valve movement and strong throttle re
Keihin™ PE28 carburetor provides smooth throttle response and is designed for simplified maintenance
Knurl-finished gear shift lever tip for improved appearance and feel
Large-capacity radiator for efficient engine cooling
SCEM-plated cylinder - lighter than a steel-sleeved cylinder with superior heat transfer capability
Smooth shifting 6-speed transmission - shift drum detent plate and detent spring designed for positive shift feel, plus needle bearing mounted on the left side of the shift drum to reduce friction
Chassis FeaturesAluminum swingarm with chain adjustment system similar to RM250
Brake and shift pedals designed with thick cross-section for durability
Chrome-moly footpegs for increased durability and improved rider feel
Easy to use clutch lever with long lever stroke for precise clutch operation and feel
Frame designed for increased rigidity, durability and straight line performance; features large diameter tubing in key areas and large front reinforcement plate
Fuel tank, radiator shroud, seat and number plates with race inspired design and graphics
Lightweight rear brake system with large 200mm diameter rear brake rotor for positive brake feel
Showa 37mm inverted fork featuring cartridge damping system with fully-adjustable rebound damping and 20-way adjustable compression damping - Includes fork guards to protect inner fork tubes
Showa rear shock absorber with large diameter shock body and valving designed to produce a plush feel and increase bottoming resistance
Twin piston front brake caliper and large 220mm diameter front brake rotor, plus large capacity front master cylinder
Wheel sizes to meet AMA 85cc class regulations F: 70/100-17, R: 90/100-14
Magneto cover with styling similar to RM250
Chassis SpecificationsBrakes Front: Disc brake
Brakes Rear: Disc brake
Color: Champion Yellow No. 2
Curb Weight: 73 kg (161 lbs.)
Final Drive: D.I.D 428DS, 118 links
Fuel Tank Capacity: 5.0 L (1.3/1.1 US/Imp gal.)
Ground Clearance: 325 mm (12.8 in.)
Overall Length: 1805 mm: (71.1 in.)
Overall Width: 735 mm (28.9 in.)
Seat Height: 850 mm (33.5 in.)
Suspension Front: Telescopic, pneumatic/coil spring, oil damped
Suspension Rear: Link type, coil spring, oil damped
Tires Front: 70/100-17 40M
Tires Rear: 90/100-14 49M
Transmission: 6-speed constant mesh
Wheelbase: 1240 mm (48.8 in.)