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2009 KTM 450SX & 505SX
The KTM 450 SX and 505 SX Sport ATV‘s were
built with one thing in mind: motocross.
Ready-to-Race, these motocross sport ATVs
feature the most powerful engines and
sophisticated suspension elements in the
industry.
High performance, great handling, supreme
quality and styling are what make the new KTM
450 SX and 505 SX race machines the most
desirable on the market.
Engine:
- 449cc DOHC 4-valve liquid cooled
- Bore 97mm, Stroke 60.8mm
- Compression Ratio 12.5:1
- Electric start w/ hot start
- 477cc DOHC 4-valve liquid cooled
- Bore 100mm, Stroke 60.8mm
- Compression Ratio 12.5:1
- Electric start w/ hot start
Motors are based off the 450 SX-F dirt bike
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.
Transmission
Close ratio 5-speed transmission
- Provides the right gear for all track
conditions. No reverse.
Cylinder Head
Engine design offers 4-valve and DOHC.
- Excellent power band and high performance
output.
Carburetor
Keihin FCR-MX 41mm flat slide carb with
acceleration pump and TPS.
- Ultra responsive and easy to tune.
Suspension
- Industry-exclusive fully adjustable WP
piggyback suspension elements with hi/lo
speed compression, preload, rebound and
crossover height adjustments on both front
and rear shocks. Tuned for motocross.
- Wider, adjustable chromolysteel dual
A-arms produce superior motocross handling
by achieving 50-inch gold standard width.
A-arm shock mounting location identical to
XC models.
- Adjustable rear axle width from 47
–50”depending on race conditions.
- Highly desirable, extremely durable and
light weight chromolysteel swingarmwith new
shock mounting point designed specifically
for motocross.
SX ATV 2009 READY TO RACE
COMPONENTS
Highlights
- 2.7 gallon fuel tank, ergonomically
designed for MX racing. Includes on/off
switch with no reserve equipped with ¼turn
quick release fuel cap.
- Lightweight DWT aluminumrims with rolled
edge and rear beadlock, 8-inch wheel.
- Race ready MaxxisRazrsoft comp tires
with aggressive MX tread design, 4-ply
rating. 21x6-10 front and 18x10-8 rear tire
sizes.
- Seat height trimmed 14mm for lower
centerof gravity and optimal MX race
ergonomics.
- Steering stem 10mm taller for ideal MX
ergonomics.
- Nerf bars, headlight cover come
standard.
- California Green Sticker legal.
The shootout dominating KTM 450 XC and 525 XC
models return for 2009 with several updates.
Highlights
- Thumb throttle turned forward 10°for
improved ergonomics.
- New plastic bolts in order to economize
aluminumbushings.
- Redesigned seat cover for optimal
comfort and feel.
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