Technical Data SM 450RR 2008

Engine
Type Single cylinder, 4-stroke, DOHC, 4 valve
Bore 97 mm
Stroke 60.76 mm
Displacement 449 cc
Compression ratio 12.9 : 1
Starting Kick (with automatic decompressor)
Electric start kit available, not fitted as stan
Exhaust system Full titanium system (silencer and pipes)
Cooling Liquid-cooled
Radiator 2
Lubrication Dry sump with 2 oil pump rotors and cartridge filter
Ignition Digital C.D.I., with variable advance
Spark plug type NGK CR 8EB
Spark plug gap 0.7 mm
Carburetor Keihin FCR-MX 41
Clutch Wet, multi-plate, mechanic control
Driving disc number 8
Driven disc number 7

Chassis
Type Steel single tube cradle with steel round tubes
Rear frame in light alloy
Front suspension MARZOCCHI USD telescopic hydraulic fork with advanced axle compression and rebound stroke adjustment
Fork leg diameter 50 mm
Fork travel 250 mm
Rear suspension SACHS Progressive Soft Damp type with single hydraulic shock absorber, spring pre-load adjustment. Compression and rebound adjustment (compression stroke - double adjustment)
Rear wheel travel 290 mm
Front brake 320 mm BREMBO floating disc type with hydraulic control and radial caliper;
Brembo brake pump Racing Type
Rear brake 240 mm BREMBO floating disc type with hydraulic control and floating caliper
Wheels with aluminium spokes and "Tubeless Alpina" STS system
Rim front 3.50" x 16.5", Excel light alloy
Rim rear 5.5" x 16.5", Excel light alloy
Tyre front 125/80-16.5" Dunlop KR 106-slick tubeless
Tyre rear 170/55-16.5" Dunlop KR 108-slick tubeless
SM 450RR

Transmission
Primary drive Secondary drive
Engine sprocket 23 Z/teeth Trans sprocket 13 Z/teeth
Clutch gear 63 Z/teeth Rear wheel sprocket 42 Z/teeth
Transmission ratio 2.739 Transmission ratio 3.230
Type Constant mesh gear type Chain D.I.D 520 V6
Speed 6
Internal ratios 2.000 (28/14) Overall ratios 17.699
2nd   1.611 (29/18) 2nd   14.257
3rd   1.333 (24/18) 3rd   11.799
4th   1.086 (25/23) 4th   9.619
5th   0.920 (23/25) 5th   8.141
6th   0.814 (22/27) 6th   7.211
Electrical Equipment
Voltage 12 V
Battery 12 V - 6 Ah


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