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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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