English, Technical specifications - chassis – KTM 50 SX User Manual
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TECHNICAL SPECIFICATIONS - CHASSIS
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CHASSIS
50 SX JUNIOR
50 SX
Frame
single downtube, split-cradle
Fork
Marzocchi Ø = 32 mm
Wheel travel front/rear
140/205 mm (5.5/8 in)
185/185 mm (7.3/7.3 in)
Rear suspension
Central shock absorber WP
Front brake
Disk brake Ø 160 mm (6.4 in)
Rear brake
Drum brake Ø 90 mm (3.5 in)
Disk brake Ø 140 mm (5.5 in)
Tires front
Pirelli 2.50-10 33J MT32A
Pirelli 60/100-12 36M MT32A
Tires rear
Pirelli 2.75-10 37J MT320
Pirelli 2.75-10 37J MT320
Tire pressure
front/rear: 1.0 bar
Fuel tank capacity
1.8 Liters
Final drive ratio
11 : 48
10 : 44
Chain
1/2x3/16“ 96 rolls
1/2x3/16“ 102 rolls
Steering angle
66°
Wheel base
910 mm (35.8 in)
1030 mm (40 in)
Seat height, unloaded
585 mm/610 mm (23/24 in)
650/675 mm (25.6/26.6 in)
Ground clearance
220 mm (8.6 in)
255 mm (10 in)
Rider’s body height
max. 130 cm (51 in)
Rider’s body weight
max. 35 kg (78 lbs)
Recommended age of rider
4-7 years
6-10 years
Engine
50 LC
TIGHTENING TORQUES
Hexagon nuts front/rear axle
M12x1
40 Nm
Hexagon nut swing arm bolt
M12
45 Nm
Clamping screw upper fork bridge
M8
25 Nm
Clamping screw lower fork bridge
M6
10 Nm
Screws handlebar clamp
M8
20 Nm
Shock absorber top/bottom
M10
45 Nm
Allan screw – Handlebar support
M10
Loctite 243 + 40 Nm
Front brake caliper
M8
Loctite 243 + 20 Nm
Front/rear brake disk
M6
Loctite 243 + 15 Nm
Spoke nipple
M4
2.5 - 3 Nm
Other chassis screws
M5
6 Nm
M6
10 Nm
M8
25 Nm
M10
45 Nm
STANDARD-ADJUSTMENT – FORK
Spring
2,0 N/mm
Preload
10 mm (0.4 in)
Fork oil
SAE 7,5
Air chamber length
110 mm (4.3 in)
STANDARD ADJUSTMENT - SHOCK ABSORBER
50 SX Junior
WP 03189C01
50 SX
WP 03189C02
Rebound adjuster
12
10
Spring
75 N/mm
35 N/mm
Spring preload
5 mm (0.2 in)
3 mm (0.12 in)