Comparison of Aprilia SR 50 R Replica SBK 2011 and Derbi Boulevard 50 2T 2009

Attribute	Aprilia SR 50 R Replica SBK 2011 ×	Derbi Boulevard 50 2T 2009 ×
General
Production from (year)	2011	2009
Make	Aprilia	Derbi
Model	Aprilia SR 50 R Replica SBK	Derbi Boulevard 50 2T
Category	Scooter	Scooter
Engine and transmission
Engine type	Single cylinder, two-stroke	Single cylinder, two-stroke
Fuel system	Carburettor	Carburettor
Displacement (cm³)	49	49.4
Cooling system	Liquid	Air
Transmission type,final drive	Belt	Belt
Bore (mm)	40	40
Stroke (mm)	39.3	39.3
Gearbox	Automatic	Automatic
Ignition	CDI - capacitor discharge ignition	Electronic CDI
Clutch	Automatic centrifugal dry clutch	Centrifugal
Lubrication system	Separate mixing with mechanical oil pump	Separate mixing with mechanical oil pump
Compression	12.1:1	10.6:1
Chassis
Front suspension	Hydraulic fork	37 hydraulic fork.
Rear suspension	Engine unit acting as swingarm; frame linkages on two radial silent block mountings.	Single shock absorber.
Front brakes	Single disc	Single disc
Rear brakes	Single disc	Expanding brake (drum brake)
Diameter (mm)	190	140
Frame type	Split single cradle frame in high tensile strength steel tube	-
Front tyre	130/60-13	120/70-12
Rear tyre	130/60-13	120/70-12
Wheels	Five spoke, light alloy	-
Front wheel travel (mm)	90	76
Rear wheel travel (mm)	70	64
Other
Starter	Electric	Electric & kick
Color options	red	white
Electrical Voltage (V)	12	-
Dimensions
Wheelbase (mm)	1,290	1,340
Dry weight (kg)	199	115
Overall height (mm)	1,120	1,115
Overall length (mm)	1,860	1,880
Overall width (mm)	705	735
Seat height (mm)	820	780
Performance
Fuel capacity (l)	7	8