KTM 450 SX-F vs Beta 450 RX

Side-by-side comparison of the KTM 450 SX-F and Beta 450 RX — weight, seat height, power, fuel capacity, suspension, and price for riders making a real buying decision.

Choose the KTM 450 SX-F if you want KTM's feel and the 450cc 4-stroke engine character. Choose the Beta 450 RX if you prefer Beta's package and the 449cc 4-stroke platform. Specs are close in many areas — what matters most is terrain, ergonomics, and dealer support.

Who wins for which rider

Rider-need verdicts. The right pick depends on what you actually ride and how you ride it.

Lighter weight for technical terrain

KTM 450 SX-F

About 1.3 kg lighter on the spec sheet, which matters in tight, technical riding.

Seat height confidence

Beta 450 RX

Lower listed seat height (945 mm) helps shorter riders flat-foot at stops.

Longer rides without refuelling

KTM 450 SX-F

7.2 L tank gives more range between fuel stops.

Better value on price

Beta 450 RX

Lower listed price at €10,999.

Side-by-side specs

Spec	KTM 450 SX-F	Beta 450 RX
Brand	KTM	Beta
Displacement (cc)	449.9	449.3
Engine stroke	4	4
Power (HP)	—	—
Torque (Nm)	—	—
Weight (kg)	102.6	103.9
Seat height (mm)	958	945
Fuel capacity (L)	7.2	6.8
Gears	5	5
Start type	Electric	Electric
Front suspension	WP XACT-USD, Ø 48 mm	48 mm KYB AOS closed cartridge fork
Rear suspension	WP XACT Monoshock with linkage	KYB 50mm body with adjustable rebound and high/low speed compression
Frame	Central double-cradle-type 25CrMo4 steel	Molybdenum steel / Double Cradle
Front brake	260 mm disc brake	260 mm floating rotor
Rear brake	220 mm disc brake	240 mm rotor
Clutch	Wet multi-disc DDS clutch, Brembo hydraulics	Hydraulic, adjustable diaphragm multi-plate clutch
Price (EUR)	11399	10999

What each bike is really like

KTM 450 SX-F

Full specs →

The KTM 450 SX-F is a championship-winning motocross machine, delivering immense power and precise handling for those who demand the pinnacle of performance.

Beta 450 RX

Full specs →

Beta's first full-size motocross bike, the 450 RX, is engineered for performance with a focus on rideability, making it a strong contender in the MXGP class.

Common questions

Is the KTM 450 SX-F better than the Beta 450 RX?

Neither is strictly better. The KTM 450 SX-F is a 450cc 4-stroke KTM, while the Beta 450 RX is a 449cc 4-stroke Beta. The right choice depends on terrain, ergonomics, and dealer support more than headline specs.

Which is lighter, the KTM 450 SX-F or the Beta 450 RX?

Listed weights are 102.6 kg for the KTM 450 SX-F and 103.9 kg for the Beta 450 RX. Always verify with the manufacturer for your model year.