Engineered by Lem for the minibike, cross motorcycle segment, the 2007 Lem RX3 utilizes a 49.9 cc (3 cu in) liquid-cooled single cylinder, two-stroke layout. In factory specification, peak output is rated at 12.8 HP (9.3 kW) at 13,500 rpm. Internal engine geometry specifies a bore and stroke of 39.0 x 41.8 mm (1.5 x 1.6 inches) with a 15.5:1 compression ratio.
On the scales, the RX3 measures 42 kg (93 lbs) dry, translating to a power-to-weight ratio of 0.3 HP/kg (3.28 kg per horsepower). Rider ergonomics and chassis geometry center around a 675 mm (26.6 in) seat height — giving shorter riders and urban commuters confident flat-foot reach at traffic stops.
Power-to-Weight
0.3 HP/kg (3.28 kg/HP)
Standover Height
675 mm (26.6 in)
Engine
Displacement49.9 ccm (3.04 cubic inches)
Engine TypeSingle cylinder, two-stroke
Engine DetailsSingle cylinder, two-stroke
Power12.8 HP (9.3 kW)) @ 13500 RPM
Compression15.5:1
Bore x Stroke39.0 x 41.8 mm (1.5 x 1.6 inches)
Fuel SystemCarburettor. Dell´Orto PHBG 19 BS
IgnitionElectronic with microchip
CoolingLiquid
Transmission
ClutchAutomatic centrifugal clutch in oil bath
Chassis
Frame TypeSeel tubes with alluminium swing-arm brake pedaland Rear Body
Wheels & Brakes
Front Tyre2.5-12
Rear Tyre2.75-10
Dimensions & Weight
Dry Weight42.0 kg (92.6 pounds)
Power/Weight0.3048 HP/kg
Seat Height675 mm (26.6 inches) If adjustable, lowest setting.
Use this page to compare this motorcycle by its real specifications, not only by model name. Focus on the details that affect fit, comfort, handling, range and ownership.
Power
Compare engine output with similar motorcycles if acceleration, highway use or two-up riding matters.
Seat Height
Check the seat height against your inseam and riding posture before choosing a motorcycle.
Weight
Compare weight carefully because it affects low-speed handling, parking and confidence.
