KTM 50 SX JUNIOR - Manual (Page 37)

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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 Scorpion Pirelli 60/100-12 36NHS Scorpion
Tires rear Pirelli 2.75-10 37J Scorpion Pirelli 2.75-10 37J Scorpion
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 M10 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 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 03189D01 50 SX
WP 03189D02
Rebound adjuster 12 10
Spring 75 N/mm 35 N/mm
Spring preload 5 mm (0.2 in) 3 mm (0.12 in)