2009 KTM 450SX
& 505SX Race Ready ATV - SX Engine
|
KTM Engine Specifications:
|
| 450
SX |
505SX |
- 449cc DOHC 4-Valve liquid cooled
- Bore 97 mm, Stroke 60.8 mm
- Compression Ratio 12.5:1
|
- 477cc DOHC 4-Valve liquid cooled
- Bore 100 mm, Stroke 60.8 mm
- Compression Ratio 12.5:1
|
 |
 |
KTM 450SX
and 505 SX ATV Engine
|
Engine Cases
Re-designed engine cases with modified engine
ventilation system. Accommodates a deep oil
sump allowing better engine performance and
increased oil capacity: 1.8L.
 |
KTM 450SX
and 505SX ATV Engine showing the Double
Overhead Cam Setup
|
Transmission
Close ratio 5-speed transmission, no reverse.
Provides the right gear for all track conditions.
Electric Start
Engine was reduced to electric starter only.
Quick to start in any situation resulting
in less rider fatigue.
Cylinder Head
Two overhead camshafts and DLC-coated finger
followers drive the four Titanium Valves.
High tech performance engine.
Crankshaft
Drive
With its design it maximizes the centrifugal
mass and ensures optimum power output.
 |
 |
KTM's
SX ATV Crank Shaft
|
KTM's
SX Model Clutch Basket Assembly
|
Clutch
MAGURA hydraulic clutch with stainless steel
braided clutch line and quick change clutch
cover. This maintenance-free clutch pulls
in effortlessly and has automatic adjustment.
Lubrication
Common oil lubrication for engine, clutch
and gearbox. Optimized dry sump design with
increased oil capacity for ATV use. Easy access
to the oil filter keeps maintenance simple.
 |
 |
KTM's
SX ATV Engine Lubrication
|
KTM's
SX ATV Carburator
|
Cooling System
Lightweight curved aluminium radiator is fitted
with an electric cooling fan. Thermostat helps
maintain constant engine temperature. Curved
shape helps improve air flow for better cooling.
Carburator
Keihin FCR-MX 41 mm flat slide carb with acceleration
pump and TPS. Very responsive and easy to
tune.
 |
 |
KTM's
SX ATV Model Air Box
|
KTM's
SX Aluminum Exhaust System
|
Airbox
Unique Airbox with specially designed snorkel
that allows for increased air intake due to
higher engine revs. Air intake draws from
the highest point to reduce intake of water
and mud. Quick release seat and no tools required
to service air filter allows for easy service.
Exhaust
Performance tuned header pipe and modern SX
aluminium silencer with integrated filter
that meets sound requirements. Lightweight,
high flow design.
