Specifications9-19Dimensions:Overall length:1245 mm (49.0 in)Overall width:610 mm (24.0 in)Overall height:705 mm (27.8 in)Seat height:475 mm (18.7 in)Wheelbase:855 mm (33.7 in)Ground clearance:95 mm (3.74 in)Minimum turning radius:1.3 m (4.27 ft)Weight:Curb weight:41 kg (90 lb)Maximum rider weight:25.0 kg (55 lb)Technical permissible mass (Maximum load +Curb weight):66 kg (146 lb)Engine:Combustion cycle:2-strokeCooling system:Air cooledNumber of cylinders:Single cylinderDisplacement:49 cm³Bore × stroke:40.0 × 39.2 mm (1.57 × 1.54 in)Compression ratio:6.0 : 1Starting system:KickstarterLubrication system:Separate lubricationEngine oil:Engine oil:YAMALUBE 2S or 2-stroke engine oil(JASO FC grade or ISO EG-C [or EG-D]grade)Recommended brand:YAMALUBEEngine oil quantity:Engine oil tank capacity:0.30 L (0.32 US qt, 0.26 Imp.qt)Transmission oil:Type:Motor oil SAE 10W-30 type SE or higher orGear oil SAE 85W GL-3Quantity:0.30 L (0.32 US qt, 0.26 Imp.qt)Air filter:Air filter element:Wet elementFuel:Recommended fuel:Regular unleaded gasoline onlyFuel tank capacity:2.0 L (0.5 US gal, 0.4 Imp.gal)Carburetor:Type × quantity:VM12SC × 1Spark plug(s):Manufacturer/model:NGK/BP4HSManufacturer/model:DENSO/W14FP-LSpark plug gap:0.6–0.7 mm (0.024–0.028 in)Clutch:Clutch type:Wet, centrifugal, shoeDrivetrain:Primary reduction ratio:1.909 (63/33)Final drive:ShaftSecondary reduction ratio:6.218 (19/15 x 54/11)Chassis:Frame type:BackboneCaster angle:25.5 °Trail:50 mm (2.0 in)Front tire:Type:With tubeSize:2.50-10 4PRManufacturer/model:BRIDGESTONE/M29Manufacturer/model:IRC/Z MARK II