KTM 450 EXC Specs & Review Enduro Off-Road Dirt Bike 2022

KTM 450 EXC: Sand, gravel, dirt, or mud – all of these kinds of terrain are equally suitable to this KTM 450 EXC. 

This meticulously-engineered dirt motorcycle has been proven to be able to take on any terrain. 

KTM 450 EXC Specs

The racing community regards it to be one of the most refined motorcycles ever created It would be fascinating to learn what inspired it to be created.

The KTM450 EXC is an Enduro-type motorcycle that is designed for the multi-faceted off-roader. 

With its sturdy engine, easy-to-use controls, and a power that is tractable this dirt bike rides effortlessly in any weather. It’s also a popular build project for many avid riders.

Its race-ready construction engine configuration, engine design, and a variety of applications demonstrate the immense technical knowledge which goes into creating this legendary motorcycle. 

Find out all the details, including tips regarding gearing modifications and much more. This article can help you decide whether you think the KTM 350 EXC could be the best motorcycle for you.


About KTM 450 EXC

It is the KTM 450 EXC is an Enduro class dirt bike that was first released to the general public in 2003. 

It was a spin-off of the previous 400 EXC model that won in 1999 the World Enduro Championship. It had a similar Racing Four-Stroke motor but with more displacement through the longer stroke. 

In the year following it, in 2004, the KTM 450 EXC came out and was launched alongside the introduction of the 990 Super Duke, 990 RC8 Venom as well as 950 Supermoto from Munich. 

The dirt bike was upgraded in handling as well as a new frame for the 2005 KTM 350 EXC and the KTM 450 EXC in 2006. KTM 350 ETC. The rear bodywork on the two models was inspired by the SX model’s style.


The year 2007 marked the first time it was the year that KTM 450 EXC street-legal was introduced in this trim. There were modifications made to:

  • Gearing
  • Exhaust
  • DOT-approved Pirelli Scorpions
  • High-/low-beam lighting
  • Turn signals
  • Switches on the handlebar
  • Clean air emission controls that conform to the EPA
  • A horn

The other characteristics that came with the dirtbike were identical to the off-road-only bike. 

On the other hand, it was the XC (Close-ratio transmission) and the XC-W (wide-ratio transmission) models that were replaced by the version that was off-road only of the EXC in the U.S. This 2007 model of the KTM450 EXC was the last bike with the RFS motor.

It is a powerful motor well-known for its reliability and can last for over 45,000 miles on fully-stock motors – when the power plant was upgraded to XC4 in 2008.

KTM 450 EXC Specs & Review

High Praise & Further Enhancements

Despite modifications made on the KTM 450 EXC, the model from 2007 received high praise from the racers who tested it during the Little Burr National Enduro in Ohio. 

Similar to its predecessor, the 2007 EXC easily sped through the clay trails that were laden with fallen leaves, through shallow creeks, narrow wooded sections as well as on-road surfaces that were smooth and smooth. 

It glides beautifully over a variety of terrains, similar to how the dirt bike version could easily tear through single tracks. The new bike didn’t show lean spots and did not slow down at lower speeds. It didn’t need lots of clutch work or a long and tedious shift. 

Riders don’t hear that popping sound that typically is heard when you abruptly stop the throttle and slow down.

Since then, KTM has made further improvements to the dirt bike. A smaller XC4 engine that had a better balancer shaft and less vibration was a hit with riders who felt at ease in the low-speed range. 

This year’s Champions Edition featured a front Brembo brake caliper, a PDS needle design, a reinforced gearbox that had idler gears, and a better tensioning of the timing chain. 

The models from 2011 featured pumps for oil, shafts, and a brand new O-ring. The 2013 models had Electronic Fuel Injection (EFI) and a diaphragm spring-chain and a lighter battery and a plug that was placed on the right side of the engine which can be used to add the kick-start lever.

KTM 450 EXC Specs & Features Engine

The main differences between the three-year-old and the 2007 KTM EXC 450s are their engine, valve clearances, and the recommended motor oil and the KTM EXC 450 prices variation that is $400 (based on information taken from Motorcycle.com). 

The transition from a full off-road dirt bike to street-legal in 2007 led to dirt penalties, removing three horses, while an additional 12 pounds of dry weight.

Configuration 2003 KM 450 EX 2007 KM 450 EX
Base MSRP $7,198.00 $7,598.00
Engine Cooling Liquid (permanent rotation via mechanically driven water pump)
Engine Fuel Unleaded premium gasoline with at least RON 95 Unleaded premium gasoline with at least RON 95
(Premium PON 91 for the USA)
Engine Brand Name Keihin FCR-MX 39
Engine Type 4-Stroke (RFS) w/ balancer shaft 4-Stroke (XC4) w/ balancer shaft
Cylinder Arrangement Single cylinder
Carburetion System Carburetor, 1 x 39-mm
Valve Timing 4 valves over rocker arm SOHC; Single-chain camshaft drive
Camshaft 590/5521
Valve Diameter Intake 35 mm
Valve Diameter Exhaust 30 mm
Valve Clearance Cold Intake 0.12 mm (0.0047 in) 0.10-0.15 mm (0.004-0.006 in)
Valve Clearance Cold Exhaust 0.12 mm (0.0047 in) 0.10-0.15 mm (0.004-0.006 in)
Crankshaft bearing 2-cylinder roller bearing
Connecting rod bearing Needle bearing
Top-end bearing Bronze bushing
Piston Aluminum alloy cast
Piston Rings 1 compression ring, 1 oil scraper ring
Horsepower 52 hp (38.8 kW)
Maximum Torque 48 Nm (35 ft-lb)
Bore x Stroke Ratio 89 mm x 72 mm 89 mm x 72 mm
Compression Ratio 11.0:1
Displacement 448 c³ / 27.3 in³
Top Speed 148.1 – 151.3 km/h (92 – 94 mph)
0-60 mph / 0-100 kmh 4.5 seconds (fully stock)
Lubrication Pressure circulation lubrication w/ two Eaton pumps
Engine Oil & Quantity Full synthetic oil (Shell Advance Ultra 4 SAE 10W-40) w/ API grade of SG/SH or higher / 1.25 L Full synthetic Motorex Power 4T SAE 10W-50 or 5W-40 w/ API grade of SL or higher / 1.25 L

Long-time KTM riders advocate that you use Rotella T 15W/40 (petroleum-based) or Rotella Shell T6 Full Synthetic Heavy Duty engine oil 5W/40 (view on Amazon) both and both are JASO T903 MA-approved. 

The T6 synthetic specifically can help decrease the sensation of the clutch in the event that the motor isn’t at full temperature. Motorcycle magazines are on the other hand suggest Bel-Ray Synthetic Super Bike Castrol 10W50 Motor Oil as well as Motorex Cross Power – all are viscose-free and have a viscosity of SAE 10W-50. 

The oil you choose to use will depend on whether or not you are a brand new KTM bicycle owner race more or you ride mostly to have fun.


A manual six-speed transmission provides the power that comes with the reverse gear and an X Ring final drive chain.

Driveline 2003 KM 450 EX 2007 KM 450 EX
Clutch Multi-disc clutch in oil bath
Transmission Type 6-speed manual, hydraulically operated wet-clutch
Final Drive Chain, X-Ring 5/8 x 1/4 “
Primary Ratio Straight geared spur wheels 33:76 Z
Final Drive Ratio 15:45 T


The KTM 450 EXC has an electronic Capacitor Discharge Ignition (CDI) with an electric/kick-starter system. 

It requires a battery of 12V that has an assembly size of 4.5 inches by 2.81 inches and 3.38 inches (L L x W x H, not including wire harnesses as well as mounting components).

The temperature of storage must not exceed the range of 0 to 35 degrees Celsius (30 to 95degF).

Electrical 2003 KM 450 EX 2007 KM 450 EX
Ignition Contactless DC-CDI w/ digital advanced system by KOKUSAI 4K-3B
Starting System Kick–electric starter
Spark Plug NGK DCPR 8 E / 0.6 mm (0.02367 in)
Generator 12V-150W
Battery Maintenance-free 12V 8Ah Maintenance-free 12V 4Ah

Tires & Brakes

The stock tires remained the same for 2003-2007 EXC models along with disc brakes.

Tires & Brakes 2003 KM 450 EX 2007 KM 450 EX
Wheels Composition Steel
Front Tire, off-road/road air pressure Pirelli 90/90 – 21“, 14.5/21.8 psi
Rear Tire, off-road/road air pressure Pirelli 140/80 – 18“, 14.5/29 psi
Front Brake Type Brembo Disc brake w/ 260-mm (10.2 in) carbon-steel brake disc, brake caliper floated
Rear Brake Type Brembo Disc brake w/ 220-mm (8.7 in) carbon-steel brake disc, brake caliper floated


The front suspension was upgraded by converting from an adjustable WP USD 48 into an inverted MXMA fork, in 2007. 

The rear suspension was the same, there were slight adjustments to the standard measurement. 

The swingarm was made of aluminum which allowed 13.2 inches of movement and made it ideal for difficult terrain. These changes have not negatively affected the soft suspension KTM bikes are known for.

Suspension 2003 KTM 450 EX 2007 KTM 450 EXC
Front Suspension Type, Travel WP USD 48 mm (fully adjustable), 300 mm / 11.8 in WP Suspension 4860 MXMA (or + PA) inverted fork, 300 mm / 11.8 in
Front Adjustable Fork Pre-load Yes (5 mm standard, adjustable up to 20 mm) No
Rear Suspension Type, Travel WP Progressive Damping System shock absorber, aluminum swingarm, 335 mm / 13.2 in
Rear Adjustable Shock/Spring Pre-load Yes (8 mm standard, adjustable up to 10 mm) Yes (5 mm standard, adjustable up to 10 mm)
Adjustment Type Standard Adjustment, WP 5018 PDS MCC 1218X761


The the2007 KTM 500 EXC gained a few pounds due to two reasons: due to the fact that it was equipped with more components that allowed it to be street legal and in part because of the change on the engine, from the RFS model to XC4. 

In addition, the engine was not changed in any other way. There were also a few differences in the dimensions between models made available within the U.S. and those released in Australia and other countries.

Dimension 2003 KTM 450 EXC 2007 KTM 450 EXC
Length 2500 mm / 98.4 in
Width 815 mm / 32.1 in
Height 1200 mm / 4.2 in
Seat Height 925 mm / 36.5 in
Ground Clearance 380 mm / 14.96 in
Wheelbase 1,481 mm / 58.3 in
Dry Weight 111-118.2 Kg / 244.7-260.6 lbs 113 Kg / 249.1 lbs
Curb Weight 130 Kg / 286.6 lbs


KTM dirt bikes from KTM.dirt bikes are comprised of a double-cradle chrome-moly frame and a plastic body material that has its distinctive matte black and orange finish that gives it a sophisticated look and is sturdy. 

Instead of gauges temperature, fuel, as well as other indicators, are included in the bike’s electronic instrumentation. 

The trip odometer is an alternative. Models that are released in Australia are only available equipped with an emergency off button.

In addition, there are rear fenders that are made by aftermarket manufacturers. They will not be a perfect match for your dirt bike since the OEM one comes with two screws pointing towards the rear of the fender’s underside, which connects the tray of taillights to it. 

It is possible to contact racing outfitters like Baja Designs or Sicass Racing for an individualized fender that has the screw posts.

Exterior 2003 KM 450 EXC 2007 KM 450 EXC
Frame Central double-cradle type Chromium Molybdenum (25CrMo4) steel frame
Body Material Plastic
Front Fender Flares Standard
Rear Fender Flares Standard
Chain Guards Yes
Fork Guards Yes
Heel Guards Yes


Multi-lingual Digital Instrumentation Standard
Electronic Speedometer Standard
Indicator Lamps Standard
Trip Odometer Standard (switch optional)
Lap Timer Standard
Clock Standard
Emergency Off Switch Standard in Australia


The lights that were DOT-approved were approved by the Department of Transportation.

They were fitted to the model of 2007 that conformed to street-legal requirements within the U.S. The voltage and socket dimensions are the same.

LIGHTING 2003 KM 450 EX 2007 KM 450 EX
Headlight HS1 12V 35/35W 12V 35/35W (Socket BA20D)
Parking Light 12V 5W (Socket W2, 1×9,5d)
Brake – Rear Light 12V 21/5W (Socket BaY15d)
Flasher Light 12V 10W (Socket Ba15s)
License Plate Illumination 12V 1,2W (Socket 1×4,6d) N/A


The information regarding the KTM 450 EXC is not included in the manual for owners, however, it is based on the 2004 KTM EXC 450 that was sourced via Fuelly.com. 

The amount you see will differ based on the manner in which you utilize your two-wheeler.

CAPACITIES 2003 KM 450 EX 2007 KM 450 EX
Fuel Capacity 8 L / 2.1 US gal (reserve – 1 L / 0.3 US gal)
Rake, Trail 26.5°, 4.3 in (110 mm)
Fuel Economy 5.53 L / 100 km (42.5 mpg)

The Dual-Sport Bike Build

This footage was produced by Rocky Mountain ATV MMC, the host explains how his friend transformed a 2004 KTM the 450 EXC, which was an uninvolved off-road vehicle into an incredible street-legal bike

Some of the advice the man gave are summarized in the following paragraphs:

  • Frame repair If you are powder-coating the frame, it’s essential to seal all holes in which bearings or components are to be placed so that when you rebuild the bicycle, each of the components will fit easily.
  • Suspension Replace all sealing and parts with brand new ones and then replace all seals and components.
  • Engine – New compression pistons and valves, springs, and gaskets will extend the life of your engine and restore it to its previous condition.
  • Carb – If the carburetor isn’t damaged, it will require a thorough cleaning, along with new sealing.
  • Exhaust – If the original header remains in one piece you can add an FMF exhaust that slips on to improve performance.
  • Seat A new foam and seat covers can help provide the additional grip you need when riding hard.
  • Footpegs and chain block A solid footpeg is a good choice for long-distance rides. Chain blocks will shield the tires from bashing during outdoor riding.

Gearing for Speed

Do your research before you alter the gear ratio of your stock car to get greater top-end speed since the higher ratios of gears could lead to RPMs which could cause loose bolts, nuts as well as tooth-fillings. 

Additionally, you could be losing more power and performing more work on the clutch in the process. Other things to be aware of include the size of your rider, the manner of riding, and speed preferences. 

Recommended gear ratios may differ for someone who wants to slam the wheel and speed up to 120 mph than someone who is looking for a good operating range, which would comprise 60 to 70 mph and more technical riding. 

The nature of the terrain is an obvious factor that should be considered a given.


The change of tires can alter the dynamics that your ratio of gears totally. A lighter tire coupled with a 14:45 ratio can increase your top speed. The 14:42 speed may not be enough for certain. 

If you buy MT43 knobbies and pair them with gearing 13:52, you can still reach 90 mph, if you want to and be able to cruise at between 55 and 65 miles per hour. 

But the tire in question is not well-known for being balanced. This is why it is important to do studying – even the rubber.


Don’t forget, too. KTM 450 EXC motors differ between 2003 and 2006 and models from 2007. 

The earlier models used RFS motors, which tend to be more raucous. If you own an engine that is similar to this engine, you may feel like it’s over-revving, even though you’re not. 

The XC4 engine that the 2007 EXC was equipped with is quieter. In the end, you should set your dirt bike to where you spend 75 percent or more of the time. 

If it’s single tracks, dirt trails, and pavement, then make sure to ride up a notch (or the reverse).

About KTM

KTM is also known as Kraftfahrzeuge Trunkenpolz Mattighofen Aktiengesellschaft is one of the leaders in the production of off-road motorcycles and is the manufacturer of the KTM 450 EXC. 

The Austrian company has been the most popular manufacturer of motorcycles in Europe since 2012. It is currently controlled by Pierer Mobility AG and Bajaj Auto Limited International Holdings B.V., KTM AG has 13 subsidiaries, many world championships, and a variety of dirt motorcycle models to its name. 

As of today, the company is still producing high-performance bikes designed for sport and leisure.

Conclusion – KTM 450 EXC Off-Road Dirt Bike

It is the KTM 450 EXC is one of the top dirt bikes manufactured by any manufacturer prior to the introduction of four-stroke engines as well as Motocross rallies. 

It has seen a number of changes over the last 17 years, all of which are focused on the rider’s satisfaction and needs for transport. 

It began as a motocross spin-off and it has gradually transformed into a dual-sport all-purpose dirt bike that is able to use on two-way lanes as well as tracks with rocks. 

If you’re in search of a bike with a sleek and innovative design and are ready for an extended day of cutting through trails and trees and tracks, look at KTM 450 EXC! KTM the 450 EXC! 

Is the KTM 450 EXC a good bike?

KTM 450 EXC, an Enduro-type motorcycle designed for off-road riding, is the KTM 450 EXC. This dirt bike is reliable, easy to use, and has a lot of power. Many enthusiasts love to build it.

Is a KTM 450 EXC street legal?

These models include the European road legal 400 EXC or 450 EXC and the US 450 (Close-ratio) XC or 450 (Wide-ratio) XC-W. European EXC models have a smaller headlight, speedometer, and tail-light, as well as a slightly softer linkless (PDS) rear suspension. The US EXC has a 50-state street legal.

How much horsepower does a 2020 KTM 450 have?

The 2020 KTM450SXF offers the broadest range of power and the most horsepower in the midrange (6500 to 9300 RPM) among all 2020 450s. 58.32 horsepower at 8800 RPM. The KTM is more pro-oriented than the 2020 Husqvarna FC450. It has a stiffer suspension.

How much HP does a KTM 500 EXC have?

KTM 500 EXC’s dry weight is 105.6 kg, and its ground clearance measures 355 mm. The 510.9cc four-stroke, single-cylinder, SOHC engine is standard. It uses the Keihin engine management system. The maximum power output of the KTM 500 EXC–F is 39.4 HP, and its peak torque output at 27.7 lb/ft.

How much HP does a 2022 KTM 450 have?

The 2022 KTM450 SX-F is the purest form of modern motorcycle technology. It’s a compact package that produces an unrivaled 63 hp most efficiently.

How many hours does a KTM 450 last?

If the engine was used for casual trail riding, it’s pretty common to see a 450 4-stroke with 300-400+ hours.

How fast does a KTM 250 SX go?

The KTM 250 SX runs on a 5-speed manual transmission. It also has a high-performance 2-stroke engine that delivers incredible performance. It is the fastest bike in quarter-liter motocross, and its top speed is 85 MPH (est).

Is KTM the best dirt bike?

KTM is the brand that everyone will recommend if you are looking for a proper dirt bike. Here’s why: their dirt bikes are some of the most potent and hardworking bikes money can buy.

What is the number 1 dirt bike brand?

1. Yamaha. Yamaha is the only brand you can trust for exceptional dirt bikes. Yamaha is a respected brand with a long history in the industry.

What is the most reliable enduro bike?

Monimoto’s Top Picks for the Best Enduro Motorcycle in 2022
  1. KTM 300 EXC TPI. The KTM 300 EXC TPI is a powerful enduro dirt bike that has a great potential for speed. …
  2. Husqvarna TE 300i. Husqvarna TE 300i is a 2-stroke enduro motorcycle. …
  3. Beta RR 300. …
  4. 2022 Honda CRF450RL. …
  5. 2022 Yamaha WR450F. …
  6. 2022 KTM 350 EXC-F.

Is a 450 too big for trail riding?

The 450 4t kinds of wood bike can be used on high-speed open trails. A 450 4t MX bicycle can be pretty heavy. KTM/Husky 350 4ts planks of wood bikes make a fantastic compromise. They can haul heavy loads in the open, but they are light and can handle the tight stuff.

Which dual sport motorcycle is best?

2021’s Best Dual Sport Bikes
  • KTM 690 Enduro R. KTM is one of the industry’s leading names in adventure and dual sport bikes, and their flagship 690 Enduro R is a clear lesson in how they continue to innovate and push forward. …
  • Husqvarna FE 450. …
  • Suzuki DR650S. …
  • Suzuki VanVan. …
  • Zero FX. …
  • Honda CRF300L.

How fast does a KTM 450 go?

KTM 450 SFX’s top speed is 123mph, making it one of the fastest bikes in this segment. The 450 SX-F has a KEIHIN engine control system and a 44 mm throttle.

Why is KTM the best dirt bike?

KTM is the creator of the most advanced 300 two-strokes on the earth. KTM 300 is why KTM was saved, and they are now considered to be one of the most respected dirt bike manufacturers on the planet. KTM has integrated its 300-horsepower motor into its cross-country and enduro lineups.

KTM 450 EXC Off-Road Dirt Bike FAQ

1. Is the KTM 450 EXC a good bike?

The KTM 450 EXC is the perfect bike for riders who enjoy enduro across all levels. It’s ideal for beginners who are just beginning to learn and all the way to experienced riders wanting to push the limits of their abilities. extreme.

2. Is a 2006 KTM 450 EXC a good bike?

This KTM is the bike.  Already equipped with traction-seeking four-stroke power, electric start with a soft suspension, and effortless handling, in ’06 the orange bike received a recalibration of fork/shock adjustments, a revised angle for the head of the steering, and a new carburetor.

3. What is the best KTM EXC?

The KTM 500 EXC-F is among the most exciting dual sports in 2020. Dual-sport motorcycles have their limitations The seat height on the KTM stands at 38 inches. The knobby tires on it aren’t efficient in fuel and don’t offer enough traction to take a turn on paved roads.

4. How long will a KTM engine last?

The car is over 30000kms and 2 1/2 years old with no issues. There is friction in the gears as well as clutch cylinders and every other moving part of the engine. Therefore, you shouldn’t expect engines to be able to last for long. You could anticipate 50000km.

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