HUSQVARNA SM 450R Supermoto





To celebrate 100 years of success, Husqvarna brought a new sense of style to track bikes unveiling a masterpiece, the TE 510 Centennial. The new SM 450-510 R are direct descendants of the Centennial and have that same unmistakeable style but now emphasised by new bodywork and colour-coded fittings.

The fuel tank, saddle, side panels, number holders, headlamp grille and mudguards are the same style as the TE 510 and give these new 4-stroke DOHC bikes an exciting new appeal. There are three colour schemes: The classic Husqvarna yellow/blue race colours, red/white like the Centennial model and black.

The work by the Husqvarna team however was not just a re-styling makeover. The SM version 4- stroke engines were significantly modified to increase both power output and reliability. The new engines have larger stem titanium valves to increase durability even under the hardest use.

The leading edge technology used to make these valves came from a supplier that is one of the leaders in the world of car racing.

The new profile SM 450/510 inlet camshaft optimises performance working in conjunction with new valve seating arrangements.

A new multi layered steel (MLS) head gasket minimises deformation caused by tightening and provides even heat distribution throughout the engine.

The latest generation 41 mm Keihin MX carburettors have been fitted to all 4-stroke models.

These new carburettors have been specially calibrated for Husqvarna to provide improved fuel flow under all types of use. Cold starting and hot engine re-starting problems are now a thing of the past thanks to the double action COLD/HOT starter button.

The engines all have electric starters. The electrics system is fitted with a safety device to prevent accidental starting whether the bike is in neutral or in gear.

Primary transmission on the 450 engine is now the same as on the 510 with a very strong aluminium (Ergal) machined clutch basket with hard anodic oxidation coating to improve clutch plate slide and reduce wear on the contact surfaces.

New features are a new crankshaft on the 450 with con-rod pin diameter increased from 30 to 34 mm, a new roller bearing with increased load capacity and silvered bearing shells, a redesigned con rod and different crankshaft balancing to reduce vibration.

Significant reworking to the electrical system was also carried out.

The digital CPU is programmable and recognizes both throttle position (TPS) and individual gear selection (GPS).

Ignition timing was modified to make starting easier and a new alternator has an improved battery re-charging that allows improved charging even from low revs.

The high-resistance rivet less flywheel on the TC 450/510 models is perfectly suited to the very abrupt torque changes required by motocross use.

Further work was carried out with the intention of reducing overall weight and improving manoeuvrability, as these elements are especially important on a motocross machine. Particular attention was paid to the suspension and brakes and many new improvements were incorporated. It was for this reason that all the new models were fitted with Sachs shock absorbers with a topout spring that improves suspension function mainly during rebound, and especially whilst under hard braking by minimising the bouncing often found in deceleration.

The shock absorber seals and chamber were also re-designed to improve cooling.

The lower shock absorber hinge featuring a roller bearing is also new.

All the rear suspension link needle bearings are now longer to reduce friction and improve durability.

Suspension settings have been modified as a result of tests by Husqvarna motocross team riders.

The new Brembo brake system features a floating 4-caliper 320 mm front disc.



Modifications to the new Husqvarna '05 Supermoto models SM 450/510 Models

Engine

· Increased valve stems
· Metallic head gasket
· Modified starter
· Aluminium clutch basket on 450
· New conrod with pivot increased from 30 to 34 on 450 engine crankshaft
· Keihin carburettor with redesigned ducts
· New inlet camshaft on SM450/510 (more low end torque)

Frame

· Suspension calibration re-set
· New seals on shock absorbers to improve efficiency, lighter chambers
· Lower shock absorber joint on rollers bearings
· Shock absorbers with top-out spring, new seals and new chamber (as for the TC MY '04)
· Radiator expansion tank.
· New Brembo front calipers

Electrics

· Improved alternator
· Timing advanced at 0 rpm to facilitate starting
· Modified flywheel
· New CPU with gear selection recognition and anti-kick back software
· Switch on clutch to prevent accidental engine starting

Bodywork

· New fuel tank, side panels and mudguards from the TE 510 Centennial
· New headlight grille
· Reinforced front mudguard


Tech Specs

Dimensions

Wheelbase ..................................... mm/in. 1495 / 58.86
Overall lenght ................................. mm/in. 2190 / 86.22
Overall width ................................... mm/in. 845 / 33.27
Overall height .................................. mm/in. 1250 / 49.21
Saddle height ........................... ........mm/in. 910 / 35.83
Min. ground clearance ........................mm/in. 270 / 10.63
Trail ............................................... mm/in. 97 / 3.82
Kerb weight, without fuel ....................Kg/lb. 240
Fuel tank capacity ........................... l 9,2
Transmission oil ...............................l 1,4
U.S. Quarts ....................................1.48

Engine

Type..........................Single cylinder, four stroke
Bore ............................................mm/in. 97 / 3.81
Stroke .........................................mm/in. 60,76 / 2.39
Displacement ...............................cm3/cu.in. 449 / 27.39
Compression ratio........................ 12:1
Starting ......................Electric (with automatic decompressor)
Cooling ....................... liquid
Water radiator .............. N°/No 2
Timing system............."DOHC", 4 valve
Lubrication.........Dry sump with two oil pump rotor and cartridge filter
Ignition..............C.D.I. electronic, with adjustable advance (digital control)
Spark plug type ........................... "NGK" CR 8EB
Spark plug gap ..............................mm/in 0,7 / 0.0275
Fuelsystem..................................."KEIHIN" MX 41
Diameter ..................................... mm/in. 41 / 1.6

Clutch

Type....................Wet, multiplate type; hydraulic control
Driving disc no .......................................8
Driven disc no ........................................7

Primary drive

Engine sprocket ........... Z/Teeth 21
Clutch gear ................. .Z/Teeth 66
Transmission ratio ..........3.143

Transmission

Type..................................Constant mesh gear type
Speed gears no ...................6
Internal ratios
........................................................1ª/1st 2,000 (28/14)
........................................................2ª/2nd 1,611 (29/18)
........................................................3ª/3rd 1,333 (24/18)
........................................................4ª/4th 1,086 (25/23)
........................................................5ª/5th 0,920 (23/25)
........................................................6ª/6th 0,814 (22/27)

Secondary drive

Transmission sprocket ...................Z/Teeth 15
Rear wheel sprocket ......................Z/Teeth 42
Transmission ratio .........................2,800
Driving chain.................................."D.I.D." 520 V6/ "REGINA" 135 ORN (5/8"x1/4")
Overall ratios
.......................................................1ª/1st 17,600
.......................................................2ª/2nd 14,178
.......................................................3ª/3rd 11,733
.......................................................4ª/4th 9,565
.......................................................5ª/5th 8,096
.......................................................6ª/6th 7,170


Frame

Type....................Steel single tube cradle (round tubes); rear frame in light alloy

Front Suspension

Type................."Upside-Down" telescopic hydraulic fork with advanced axle; compression and rebound stroke adjustment
Fork legs dia. .......................................... mm/in. 45 /1.77
Travel on legs axis ...................................mm/in. 250 / 9.84
Front fork manufacturer .............................. "MARZOCCHI"

Rear suspension

Type.................Progressive "Soft Damp" type with single hydraulic shock absorber; spring preload adjustment, compression and rebound adjustment (compression stroke: double adjustment)
Wheel travel ..................................................... mm/in. 290 / 11.42
Shock absorber manufacturer ................................ "SACHS"

Front brake

Type........................................disc type with fixed caliper
Disc dia. ............................................... mm/in 320 / 12.6

Rear brake

Type.......................................fixed disc type with floating caliper
Disc dia. ................................................ mm/in 220 / 8.66

Front rim

Material............................... Light alloy
Size .................................... 3,50"x17"

Rear rim

Material............................... Light alloy
Size .................................... 4,25"x17"

Front Tire

Type ............................................ "PIRELLI" MTR 21 Dragon-EVO
Size .............................................................120/70-17"

Rear tire

Type ............................................ "PIRELLI" MTR 22 Dragon-EVO
Size ............................................................150/60-17"

Electrical equipment

Voltage ........................................................12 V
Battery ....................................................... 12 V-6Ah

Lamps wattage

Head light ....................................................35 / 35 W
Pilot light .....................................................3 W
Tail light ......................................................5 W
Stop light ....................................................21 W
Turn signals ................................................10 W
Instruments light ......................................... 2 W
Warning lights ............................................ 1,2 W

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