KTM SX85 2019

Engine

Design

 

1-cylinder 2-stroke engine, water-cooled, with reed intake and exhaust control

Displacement

64.85 cm³ (3.9574 cu in)

Stroke

40.8 mm (1.606 in)

Bore

45 mm (1.77 in)

Idle speed

1,400 … 1,500 rpm

Control

Exhaust control PCEV (Pneumatic Controlled Exhaust Valve)

Crankshaft bearing

2 grooved ball bearings

Conrod bearing

Needle bearing

Piston pin bearing

Needle bearing

Pistons

Aluminum cast

Piston rings

1 rectangular ring

Engine lubrication

Mixture oil lubrication

Primary transmission

23:75 straight cut spur gear

Clutch

Multidisc clutch in oil bath/hydraulically activated

Gearbox

6-gear, claw shifted

Transmission ratio

1st gear

13:37

2nd gear

16:34

3rd gear

18:31

4th gear

21:30

5th gear

23:28

6th gear

24:26

Ignition

Non-contact controlled fully electronic ignition system with digital ignition adjustment

Spark plug

NGK LR 8 B

Spark plug electrode gap

0.60 mm (0.0236 in)

Cooling

Water-cooled

Starting aid

Kickstarter

Carburator

Carburetor type

 

MIKUNI TM 24

Needle position

2nd position from top

Idle air adjusting screw

 

Open

3.5 turns

Main jet

210

Jet needle

5IPL43

Idling jet

20

Needle jet

Q-O (454)

Throttle slide

2.5

Gear oil

0.50 l (0.53 qt.) – 15W50

Coolant

0.55 l (0.58 qt.)

Fuel tank capacity, approx.

3.5 l (3.7 qt.)

Frame

Frame

 

Central tube frame of chrome molybdenum steel tubing, powder-coated

Fork

WP Performance Systems Upside down AER 35

Shock absorber

WP Performance Systems 3614 BAVP

Suspension travel

 

front

215 mm (8.46 in)

rear

270 mm (10.63 in)

Fork offset

22 mm (0.87 in)

Brake system

 

front

Disc brake with four-pot brake caliper

rear

Disc brake with four-pot brake caliper

Brake disc diameters

 

front

198 mm (7.8 in)

rear

160 mm (6.3 in)

Brake discs - wear limits

 

front

2.5 mm (0.098 in)

rear

2.5 mm (0.098 in)

Tire air pressure off road

 

front

1.0 bar (15 psi)

rear

1.0 bar (15 psi)

Secondary drive ratio

14:48

Chain

1/2 x 1/4” O-ring

Rear sprockets available

46, 48, 50

Steering head angle

64.5°

Wheelbase

1,137 mm (44.76 in)

Seat height unloaded

750 mm (29.53 in)

Ground clearance unloaded

280 mm (11.02 in)

Weight without fuel, approx.

53 kg (117 lb.)