Aprilia RS4 50 Replica (2012-) vs Aprilia RS4 125 (2017-18) vs Kawasaki VN 1500 Vulcan Drifter (1999-01) vs Kawasaki KDX 125R (1999-00) vs Kawasaki KDX 200R (1999-01)

Comparison technical specifications

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Make:	Aprilia	Aprilia	Kawasaki	Kawasaki	Kawasaki
Model:	RS4 50 Replica	RS4 125	VN 1500 Vulcan Drifter	KDX 125R	KDX 200R
Years:	2012-	2017-18	1999-01	1999-00	1999-01
Engine:	Two stroke, single cylinder, DOHC, 4-valve	Four stroke, single cylinder, DOHC, 4 valves	Four stroke, 50° V-Twin, SOHC, 4 valves per cylinder	Two stroke, single cylinder, with KIPS	Two stroke, single cylinder, reed valve
Capacity:	49.9 cc / 3.05 cub in.	124.8 cc / 7.6 cu in	1470 cc / 89.7 cu-in	124 cc / 7.6 cu-in	198 cc / 12.0 cu-in
Bore x Stroke:	39.9 x 39.9 mm	58 X 47 mm	102 x 90 mm	56 х 50.6 mm	66 x 58 mm
Cooling System:	Liquid cooled	Liquid cooled	Liquid cooled	Liquid cooled	Liquid cooled
Compression Ratio:	11.5:1	12.5 ± 0.5:1	9.0:1	8,0:1	9.4:1
Ignition:	CDI	Electronic with CDI capacity discharge	Digital	CDI	Electronic CDI
Starting:	Electric	Electric	Electric	Electric	Electric
Transmission:	6-Speed	6 Speed	5 Speed	6 Speed	6 Speed
Final Drive:	Chain	Chain: 60/13 (4.61)	Shaft	Chain	Chain
Front Suspension:	Upside down fork, Ø41 mm	Ø41 mm Upside down fork	41mm cartridge fork	Kayaba 48mm telescopic hydraulic fork reversed KAYABA 48mm, double adjustment + adjustable spring preload, prepared	43mm Telescopic forks 20-way compression damping
Front Wheel Travel:	110 mm / 4.3 in.	110 mm / 4.3 in	150 mm / 5.9 in	300 mm / 11.8 in	290 mm / 11.4 in
Rear Suspension:	Asymmetric swingarm, monoshock	Asymmetric swingarm with monoshock	Dual air assisted shock absorbers with 4-way rebound damping adjustment	Uni-Trak adjustable for preload	Single shock adjustable preload, 20-way compression damping and 18-way rebound damping
Rear Wheel Travel:	122 mm / 4.8 in.	130 mm / 5.1 in	100 mm / 3.9 in	320 mm / 12.5 in	300 mm / 11.8 in
Front Brakes:	Stainless steel disc, Ø 300 mm, 4-piston radial caliper	Single 300 mm disc, 4 piston caliper	2x 320mm discs 6 piston calipers	Single 260mm disc	Single 250mm disc 2 piston caliper
Rear Brakes:	Stainless steel disc, Ø 218 mm, single piston caliper	Single 218 mm disc, 1 piston caliper	Single 270mm disc 2 piston caliper	Single 220mm disc	Single 230mm disc 1 piston caliper
Front Tyre:	110/80-17	110/80 17	130/90R-16	70/100-21	80/100-21
Rear Tyre:	130/70-17	130/70 17	150/80R-16	4.10-18	100/100-18
Wheelbase:	1350 mm / 53.1 in	1353 mm / 53.2 in	1655 mm / 65.2 in	1455 mm / 57.3 in to 1480 mm / 58.2 inaccording to chain tension	1435 mm / 56.5 in
Seat Height:	820 mm / 32.3 in.	820 mm / 32.3 in	739 mm / 29.1 in	950 mm / 37.4 in	919 mm / 36.2 in
Fuel Capacity:	14.5 Litres / 3.8 US gal	14.5 Litres / 3.8 US gal	18.9 Liter / 5.0 US gal	9.0 Litres / 2.3 US gal	11 Litres / 2.9 US gal