Sunbeam B1 (1957-64) vs KTM 300 EXC Enduro (2003-04) vs Kawasaki ER-6n (2016) vs ATK 125 2-Stroke (2003) vs Harley-Davidson Harley Davidson FXDWG/I Dyna Wide Glide (2001-02) vs Harris Rayner Ducati () vs Yamaha YS 125 (2017)

Comparison technical specifications

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Make:	Sunbeam	KTM	Kawasaki	ATK	Harley-Davidson	Harris	Yamaha
Model:	B1	300 EXC Enduro	ER-6n	125 2-Stroke	Harley Davidson FXDWG/I Dyna Wide Glide	Rayner Ducati	YS 125
Years:	1957-64	2003-04	2016	2003	2001-02		2017
Engine:	Parallel twin cylinder, 4 stroke	Two stroke, single cylinder	Four stroke, parallel twin, DOHC, 4 valves per cylinder.	Two stroke, single cylinder	Four stroke, 45° V-Twin, Twin Cam 88® vibration isolation-mounted Valves Pushrod-operated overhead valves; w/ hydraulic self-adjusting lifters; two valves per cylinder	Four stroke, 90°“L”twin cylinder, SOHC, desmodromic 2 valve per cylinder.	Four stroke, single cylinder, SOHC, 2 valves
Capacity:	250 cc / 15.3 cu in	293 cc / 17.9 cu in	649 cc / 39.6 cu-in	125 cc / 7.7 cu in	1449 cc / 88.4 cu-in	642	124 cc / 7.6 cu-in
Cooling System:	Forced air cooled	Liquid cooled	Liquid cooled,	Liquid cooled	Air cooled	Air cooled	Air cooled
Compression Ratio:	6.5:1	11.0:1	11.3;1	11.2:1	8.9:1	10.5:1	10.0:1
Transmission:	Four speed	5 Speed	6 Speed	6-Speed	5 Speed	5 Speed	5 Speed Constant Mesh
Final Drive:	Enclosed chain in oil bath	Chain, Regina O-ring	Chain	Chain	Belt	Chain	Chain
Front Brakes:	Drum, 127 mm diameter	Single260 mm disc, 2 piston caliper	2x 300mm discs 2 piston Calipers	Single disc, 260 mm, 2-piston caliper	Single 300mm disc 4 piston caliper	2x 254 mm discs	Single 245mm disc
Rear Brakes:	Drum, 127 mm diameter	Single 220 mm disc, 1 piston caliper	Single 220mm disc 1 piston Caliper	Single disc, 220 mm, 1-piston caliper	Single 292mm disc 4 piston caliper	Single 254 mm disc	120mm Drum