KTM 690 LC4 - Technical Specifications - Engine

TECHNICAL SPECIFICATIONS – ENGINE »
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ENGINE 690 SUPERMOTO / 690 SUPERMOTO PRESTIGE 2007
Design Single-cylinder, 4-stroke Otto engine with balancer shaft
Displacement 654 cc
Bore / Stroke 102 / 80 mm (4.02 / 3.15 in)
Compression ratio 11.8 : 1
Fuel unleaded fuel with at least RON 95 (USA: Premium PON 91)
Valve timing 4 valves OHC, roller rocker arms
Valve diameter Intake: 40 mm (1.57 in) Exhaust: 34 mm (1.34 in)
Valve clearance, cold 0.07 - 0.13 mm (0.00276 - 0.00512 in)
Crankcase bearing Two-cylinder roller bearing
Conrod bearing Needle bearing
Piston pin bearing Bronze bushing
Piston Light alloy – forged
Piston rings 1 L-ring, 1 tapered compression piston ring, 1 oil scraper ring
Engine lubrication Semi-dry sump with 2 Eaton pumps
Engine oil Fully-synthetic 10W/60 engine oil according to the JASO T903 MA specification (Motorex Cross Power 4T 10W/60)
Quantity of engine oil approx. 2 liters (0.53 USgal)
Primary drive Straight-toothed spur wheels 36 : 79
Clutch APTC multi-disc wet clutch, hydraulically operated
Transmission 6-speed claw shifted
Gear ratio 1
st
gear 14 : 35
2
nd
gear 16 : 28
3
rd
gear 21 : 28
4
th
gear 21 : 23
5
th
gear 23 : 22
6
th
gear 23 : 20