Ducati Formula 73 (2026) vs SYM Jet4 50 (2014) vs Kawasaki GPz 1000RX (1988) vs Husqvarna SMR 125 (2012) vs Beta RE 125 AT (2008) vs Kawasaki KL X400R (2003)

Comparison technical specifications

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Make:	Ducati	SYM	Kawasaki	Husqvarna	Beta	Kawasaki
Model:	Formula 73	Jet4 50	GPz 1000RX	SMR 125	RE 125 AT	KL X400R
Years:	2026	2014	1988	2012	2008	2003
Engine:	Four stroke, 90? ?L? twin cylinder, SOHC, desmodromic 2 valves per cylinder	Single cylinder, 4-stroke, SOHC	Four stroke, transverse four cylinders, 4 valve per cylinder	Four stroke, single cylinder, SOHC, 4 valve	Air cooled, four stroke, single cylinder,	Four stroke, single cylinder, DOHC, 4 valve
Capacity:	803 cc / 49.0 cub in	49.5 cc / 3.0 cub in.	997 cc / 60.8 cu-in	124.4 cc / 7.6 cu-in	123 cc / 7.5 cu in	398 cc / 24.3 cu-in
Cooling System:	Air cooled	Air cooled	Liquid cooled	Liquid cooled	Air cooled	Liquid cooled, 50% distilled water & 50% ethylene glycol base antifreeze
Compression Ratio:	11.0:1	12.2:1	10.2:1	11.2:1	10.0:1	11.3:1
Induction:	Electronic fuel injection, 50 mm throttle body, Ride by Wire system	Electronic	4x Keihin CVK 36 carburetors	Carburettor KEIHIN 29	Mikuni 5NH1 carburetor	Keihin FCR39
Ignition:	Marelli electronic	CDI	TCI (Transistor Controlled Ignition)	CDI	Moryama 5HH	Digital CDI
Starting:	Electric	Electric & kick	Electric	Electric	Electric & kick	Electric
Clutch:	Hydraulically controlled slipper and self-servo wet multiplate clutch	Centrifugal	Wet, multiple discs, cable operated	Wet,multiplate type; hydraulic control	Wet, multiplate	Wet, multi-disc, manual
Transmission:	6 speed with Ducati Quick Shift up/down	CVT	6 Speed	6 Speed	5 Speed	6 Speed
Final Drive:	Chain, front spocket 15, rear sprocket 46	Belt	Chain	Chain	Chain	Chain, 520, O-ring, 14-tooth front, 50-tooth rear
Frame:	Tubular steel trellis frame	Pipe under bone, steel	Steel, twin spar	TypeDouble tube cradle with high resistance steel round tubes; rear frame with steel square tubes	Steel, double cradle	High tensile steel perimeter
Front Suspension:	41mm Kayaba USD forks	Telescopic fork	40mm Telescopic forks, air assistance and AVDS	Marzocchi Upside-Down telescopic hydraulic fork with advanced axle	Hydraulic forks, 41mm Ø	Telescopic, oil-damped, 11-way compression damping, adjustable spring preload
Rear Suspension:	Kayaba rear shock, pre-load adjustable	Twin sided swing arm	Uni-Trak rising-rate with adjustable rebound damping.	Progressive "Soft Damp" type with single hydraulic shock absorber; spring preload adjustment 290 mm wheel travel	Single shock adjustable spring preload	Link-type, fully adjustable spring preload, 26-way compression damping
Front Brakes:	Single 330 mm disc, 4-piston caliper	Hydraulic disc, 226 mm	2x 280mm discs 1 piston calipers	Single 260mm disc 4 piston caliper	Single 260 mm Ø disc	Single 250mm disc 2 piston caliper
Rear Brakes:	Single 245 mm disc, 1-piston floating caliper	Drum, 110 mm	Single 260mm disc 1 piston caliper	Single 220mm disc 2 piston caliper	Single 220 mm Ø disc	Single 220mm disc 1 piston caliper
Front Tyre:	120/70 R17 Pirelli Diablo Rosso IV	120/60-13 tubeless	120/80-16	110/70 -17	90/90-21	80/100-21
Rear Tyre:	180/55 R17 Pirelli Diablo Rosso IV	130/70-12 tubeless	150/80-16	150/60 -17	120/80-18	120/90-18
Seat Height:	808 mm / 31.8 inches	775 mm / 30.5 in.	790 mm / 31.1 in	900 mm / 35.4 in	890 mm / 35.0 in	945 mm / 37.2 in
Fuel Capacity:	14.4 Litres / 3.8 US gal	5.2 L / 1.4 US gal	21 Litres / 5.5 US gal	9.5 Litres / 2.5 US gal	6.7 L / 1.8 US gal	10 Litres / 2.6 US gal