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General Specifications
EngineEngine Type 2-stroke, 1-cylinder, Piston reed valve,
Liquid cooled, KIPSDisplacement 249 ccBore X Stroke 66.4 x 72.0 mmCompression Ratio 9.0:1 (High speed) 10.8:1 (Low speed)Carburetor Keihin PWK38 w/power jetLubrication System Premix gasoline & oilIgnition System Magneto CDIIgnition Advance DigitalCylinder Material Aluminum alloy with Electrofusion boreFuel Required Min 95 Research/90 Avg. Octane, Mixed 32:1 Gas:OilOil 2-stroke racing oilCoolant 50% soft water /50% ethylene glycol base antifreeze
—Capacity 1.18 liter—Level Level with radiator filler neck
TransmissionClutch Type Wet, Multi-disc, ManualTransmission 5-speed, Constant mesh, Return shiftShift Pattern (Bottom up) 1-N-2-3-4-5Gear Ratios —1st 2.133 (32/15)
—2nd 1.625 (26/16)—3rd 1.333 (24/18)—4th 1.136 (25/22)—5th 1.000 (24/24)
Primary Ratio 2.750 (55/20)Final Ratio 3.692 (48/13)Overall Ratio (Top Gear) 10.365
ChassisWheelbase 1,480 mmSeat Height 950 mmGround Clearance 380 mmDry Weight 213.8 lb.Fuel Tank Capacity 2.2 gal.Tire Size —Front 80/100-21
—Rear 100/90-19Brake Type —Front Single Hydraulic disc
—Rear Single Hydraulic discBrake Size —Front 220 mm Effective Diameter
—Rear 190 mm Effective DiameterWheel Travel —Front 310 mm
—Rear 330 mm
Model IdentificationYear & Model ‘98 KX250-K5Color Lime Green (7F)VIN Range JKAKXMKC ✓ WA027001 —?Engine No. Range KX250KE000001— ?Engine No. Location RH side crankcase, beside carburetor
Tuning Specifications
Engine
Spark Plug NGK BR8EVX—Gap 0.5-0.6 mm
Ignition Timing 11° at 7,000 rpmTransmission Oil SE Class SAE 10W30 or 10W40
—Capacity 0.85 liter—Level M/C vertical, wait 5 min., between lines in window
ChassisFork Oil Kayaba 01
—Capacity 615-623 cc—Level N/A
MF\KX2K1SPC