AJS EOS 125 Mk2 (2012-14) vs Aprilia RS4 125 (2019-20) vs Yamaha SR 250 (1980-82) vs Yamaha WR 250F (2017)

Comparison technical specifications

Add bike	Remove bike	Remove bike	Remove bike	Remove bike
Make:	AJS	Aprilia	Yamaha	Yamaha
Model:	EOS 125 Mk2	RS4 125	SR 250	WR 250F
Years:	2012-14	2019-20	1980-82	2017
Engine:	Twin cylinder, 4-stroke	Four stroke, single cylinder, DOHC, 4 valves	Four stroke, single cylinder, SOHC, 2 valve	Four stroke, single cylinder, DOHC, 4 valve Titanium
Capacity:	124 cc / 7.6 cub in	124.8 cc / 7.6 cu in	239 cc / 15.2 cu-in	249 cc / 15.2 cu-in
Bore x Stroke:	44 x 40 mm	58 X 47 mm	73.5 x 56.5 mm	77 x 53.6 mm
Cooling System:	Liquid cooled	Liquid cooled	Air cooled	Liquid cooled
Ignition:	Coil, CDI	Electronic with CDI capacity discharge	Electronically	TCI: Transistor Controlled Ignition
Starting:	Electric	Electric	Electric	Electric / Kick
Transmission:	5-Speed	6 Speed	5 Speed	6 Speed Wide ratio
Final Drive:	Chain	Chain: 60/13 (4.61)	Chain	#520 Chain
Front Suspension:	Telescopic forks, USD	Ø41 mm Upside down fork	32mm Telescopic forks	48 mm inverted fork, Adjustable
Rear Suspension:	Twin shock	Asymmetric swingarm with monoshock	Dual shock 5-way preload adjustment.	KYB Fully adjustable single shock
Front Brakes:	Twin disc	Single 300 mm disc, 4 piston caliper	Drum	Single 270mm floating wave disc 2 piston caliper
Rear Brakes:	Single disc	Single 218 mm disc, 1 piston caliper	Drum	Single 245mm disc 1 piston caliper
Front Tyre:	80/90-21	110/80 17	3.00-18	80/100-21
Rear Tyre:	160/80-16	130/70 17	120/90-16	100/100-18
Wheelbase:	1860 mm / 73 in.	1353 mm / 53.2 in	1340 mm / 52.75 in	1465 mm / 57.7 in
Seat Height:	640 mm / 25 in	820 mm / 32.3 in	740 mm / 29.0 in	965 mm / 38.0 in
Fuel Capacity:	14 L / 3.7 US gal	14.5 Litres / 3.8 US gal	10.8 Litres / 2.7 US gal	7.5 Litres / 2.0 gal