KTM 85SX - Manual (Page 36)

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TECHNICAL SPECIFICATIONS - ENGINE
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ENGINE 85 SX
Design Liquid cooled single cylinder two-stroke engine with reed valve intake
Displacement 84.93 ccm
Bore/stroke 47 / 48.95 mm
Fuel unleaded fuel with at least RON 95 (USA = Premium RON 91), mixed with high grade two-stroke oil
Oil/gasoline ratio
1 : 40 - 1 : 60 when using high grade two-stroke oil (e.g. Motorex 2T Crosspower),
when in doubt, please contact your importer
Lubrication mixture lubrication
Crankshaft bearing deep-groove ball bearing, cylinder roller bearing
Connecting rod bearing needle bearing
Piston pin bearing needle bearing
Piston rings 1 compression ring
Primary drive straight cut spur gears, 19 : 66 t
Clutch multiple disc clutch in oil bath, hydraulic operated (Motorex Kupplungs-Fluid 75)
Transmission 6 speed, claw actuated
Gear ratio
1 st gear 11 : 29
2 nd gear 14 : 28
3 rd gear 16 : 26
4 th gear 19 : 26
5 th gear 21 : 25
6 th gear 20 : 21
Transmission oil 0.5 liter engine oil Motorex Topspeed 4T 15W50
Ignition system Moric Digital 2M1
Spark plug NGK BR 10 ECMVX
Electrode gap 0.60 mm
Carburetor flat-slide carburetor, carburetor see table
Coolant 1 liter, mixture 50% antifreeze, 50% distilled water, at least –25° C (-13° F)
Air filter wet foam type air filter insert
BASIC CARBURETOR SETTING
Carburetor
Keihin PWK 28
Main jet 118
Needle jet 2.6
Idling jet 45
Jet needle N5HG
Needle position from top III
Throttle valve 3.5
Starting jet 62
Air adjustment screw open 1,5