Sunbeam Model 6 "Lion" (1921-37) vs Sunbeam S7 500, S7 500 De Luxe (1946-56) vs Derbi GPR 125 (2011-) vs KTM 690 Duke (2015) vs Sunbeam Model 7 and 7A (1922-40) vs Derbi GPR 125 Nude (2007-)

Comparison technical specifications

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Make:	Sunbeam	Sunbeam	Derbi	KTM	Sunbeam	Derbi
Model:	Model 6 "Lion"	S7 500, S7 500 De Luxe	GPR 125	690 Duke	Model 7 and 7A	GPR 125 Nude
Years:	1921-37	1946-56	2011-	2015	1922-40	2007-
Engine:	Single cylinder, side valve	Parallel twin, SOHC	Two stroke, single cylinder	Four stroke, single cylinder, SOHC, 4 valves	Single cylinder, side valve	Two stroke, single cylinder
Capacity:	492 cc / 30.0 cu in	487 cc / 29.7 cu in	124.7 cc / 7.6 cu-in	690 cc / 42.1 cu in	596 cc / 36.4 cu in	124.7 cc / 7.6 cu-in
Bore x Stroke:	77 x 105.5 mm	70 x 63.5 mm	56 x 50 mm	102 x 84.5 mm	77 x 105.5 mm	56 x 50 mm
Cooling System:	Air cooled	Air/Oil cooled	Liquid cooled	Liquid Cooled	Air cooled	Liquid cooled
Starting:	Kick	Kick	Electric	Electric	Kick	Electric
Transmission:	3-Speed wide ratio	4-Speed	6 Speed	6 Speed	4-Speed	6 Speed
Final Drive:	Chain	Shaft	Chain	Chain X-Ring 5/8 x 5/16"	Chain	Chain
Front Suspension:	Druid forks	Telescopic, one way damped	40mm Fourche USD hydraulic forks, 120mm wheel travel	WP Upside-down forks, 4357 ROMA	Druid forks	Inverted fork. 120mm wheel travel
Rear Suspension:	Rigid, spring loaded saddle	Plunger, spring loaded saddle	Monoshock, 110mm wheel travel	WP monoshock, 4618 with Pro-lever deflector	Rigid, spring loaded saddle	Monoshock 110mm wheel travel
Front Brakes:	Drum	Drum, leading shoe, 203 mm / 8"	Single 300mm disc 4 piston caliper	Single 320 mm floating disc, radially screwed four-piston brake caliper	Drum	Single 300mm disc 4 piston caliper
Rear Brakes:	Drum	Drum, leading shoe, 203 mm / 8"	Single 180mm disc 2 piston caliper	Single 240 mm floating disc, single piston caliper	Drum	Single 180mm disc 2 piston caliper