KTM 540 SXC Motorcycle Specs (98)
The following technical specification applies for KTM 540 SXC 1998 models. Find detail information about engine (displacement, bore and stroke, compression ratio, camshaft, etc), chassis and basic carburetor setting specification in the following table.
Find also the KTM 540 SXC 1998 Service Manual.
ENGINE & TRANSMISSION
| Engine | 540 LC4 |
| Design | Liquid-cooled single cylinder 4-stroke engine with and without balancer shaft |
| Displacement | 538,5 cm³ |
| Bore / Stroke | 95 / 76 mm |
| Ratio | 11,1 : 1 |
| Fuel | unleaded premium gasoline with a least RON 95 |
| Valve timing | 4 valves over rocker arm and 1 overhead camshaft, camshaft drive through single chain |
| Camshaft | 249° (249/1) |
| Valve timing by 1 mm | IO 13° BTDC EO 53° BBDC |
| Valve clearance | IC 51° ABDC EC 11° ATDC |
| Valve diameter | Intake: 36 mm, Exhaust: 30 mm |
| Valve clearance cold | Intake: 0,15 mm, Exhaust: 0,15 mm |
| Crank shaft bearing | 2 cylinder roller bearing |
| Connecting rod bearing | needle bearing |
| Top end bearing | bronze bushing |
| Piston | forged/cast aluminum alloy |
| Piston rings | 1 compression ring, 1 taper face ring, 1 oil scraper ring |
| Engine lubrication | forced-feed lubrication through two Eaton-Oil pumps with oil sump |
| Engine oil quantity | 1,40 liters |
| Primary ratio | straight geared spur wheels 30 : 81 teeth |
| Clutch | multi disc clutch in oil bath |
| Transmission | 5-speed claw shifted |
| Gear ratio:
1st |
14:35 |
| Ignition system | contactless thyristor ignition with electronic advanced system type SEM |
| Ignition timing | adjustment to max. 38 ° BTDC at 6000 rpm |
| Generator | 12V 130W |
| Spark plug | NGK D8EA |
| Spark plug gap | 0,6 mm |
| Cooling system | liquid cooled, permanent rotation of cooling liquid through mechanic driven water pump |
| Cooling liquid | 1 liter, 40% antifreeze, 60% water, at least –25 °C (–13 °F) |
| Starting equipment | decompressor automatic and hand actuated, cold and hot start knob on carburetor |
CHASSIS, BRAKE, TIRE
| Frame | Central chrome-moly-steel frame |
| Fork | WP Extreme |
| Wheel travel front/rear | 285/320 mm (11,2/12,6 in) |
| Rear suspension | Central shock absorber (WP) with PRO-LEVER linkage to rear-swingarm with needle bearing |
| Front brake | Disc brake with carbon-steel brake disc , brake caliper floated brake disc Ø = 260 mm (10,2 in) |
| Rear brake | Disc brake with carbon-steel brake disc Ø 220 mm (8,7 in), brake caliper floated |
| Tyres front | 90/90 – 21 |
| Air pressure offroad | 1,0 bar (14 psi) |
| Air press. road, driver only | 1,5 bar (21 psi) |
| Tyres rear | 140/80 – 18 |
| Air pressure offroad | 1,2 bar (17 psi) |
| Air press. road, driver only | 2,0 bar (28 psi) |
| Fuel tank capacity | 9 liter (3 US gallons) of that 1,5 liter (0,4 US gallons) reserve |
| Final drive ratio | 15:50 |
| Chain | 5/8 x 1/4″ O-Ring |
| Steering angle | 62,5° |
| Wheel base | 1510 ± 10 mm (59,4 ± 0,4 in) |
| Seat high | 940 mm (37 in) |
| Ground clearance | 350 mm (13,8 in) |
| Dead weight without fuel | 122 kg (269 lbs) |
CARBURETOR and BASIC CARBURETOR SETTING
| Carburetor | VHSB 38 QS |
| Carburetor setting number | 081297 |
| Main jet | 185 |
| Needle jet | FN 260 |
| Idling jet | 33 |
| Jet needle | K 32 |
| Needle position from top | II |
| Mixture.adju. screw open | 1,5 turn |
| Throttle valve | 50 |
| Starting jet | 40 |
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