Manual Derbi GPR 50cc 6 Speed Engine (page 12 of 71) (English)

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DIMENSIONS

OVERALL LENGTH (mm.) .............1,900

OVERALL WIDTH (mm.)................670

OVERALL HEIGHT (mm.) ..............1,135

WHEELBASE (mm.).......................1,315

FRAME R Racing

FRAME TYPE......................................................................................Perimeter

FRONT SUSPENSION: TYPE..................................................Inverted hydraulic forks

FRONT SUSPENSION: STROKE / BAR DIAMETER

........120 mm./ 35 mm...........95 mm./ 35 mm.

FRONT SUSPENSION: FORK BAR OIL CAPACITY

.........175 cc SAE 10W .........140 cc SAE 10W

REAR SUSPENSION: TYPE / STROKE .................

Progressive single shock......Progressive single shock

absorber / 120 mm.............absorber / 110 mm.

STEERING ANGLE.................................................................................24.5º

FRONT TYRE: SIZE ........................................................90/90x16”.....................90/80x17”

FRONT TYRE: PRESSURE.............................................1.7 to 1.8......................2.0 to 2.1

REAR TYRE: SIZE..........................................................120/80x16”...................110/80x17”

REAR TYRE: PRESSURE ...............................................1.7 to 1.8......................2.0 to 2.1

FRONT BRAKE: TYPE / SIZE .................................................Hydraulic disc 260 mm.

REAR BRAKE: TYPE / SIZE ....................................................Hydraulic disc 220 mm.

OVERALL CAPACITY, FUEL TANK.....................................................7.25 litres

OVERALL CAPACITY, OIL RESERVOIR..............................................1.0 litre

COOLING LIQUID CAPACITY ..............................................................1.1 litre

ENGINE

OPERATING CYCLE..........................................................................Two stroke

BORE x STROKE............................................................................39.86 x 40 mm.

NUMBER OF CYLINDERS ......................................................................One

TOTAL CUBIC CAPACITY.....................................................................49.9 cc

MAXIMUM POWER ....................................................................9.0 CV at 9,000 rpm

COMPRESSION RATIO ..........................................................................13:1

FUEL......................................................................................Unleaded petrol 95 Octane

ADMISSION SYSTEM........................................................................Reed valve

STARTER SYSTEM ...........................................................................Kick starter

LUBRICATION SYSTEM......................................................................Oil pump

COOLING SYSTEM.................................................

Liquid-cooled with pump, radiator, and thermostat

CARBURETTOR

BRAND / TYPE ..........................................................................Dell´Orto / PHVA 17.5

ENGINE IDLE SPEED ......................................................................1,900 ± 100

TURNS IDLE JET AIR SCREW..................................................................3

DIFFUSER DIAMETER .......................................................................17.5 mm.

# IDLE JET ...............................................................................................#34

# MAIN JET ..............................................................................................#98

CONICAL NEEDLE: TYPE / STD ADJUSTMENT ................................A15/4th

SLIDE VALVE ...........................................................................................#40

# EMULSIFIER TUBE ..........................................................................#212FA

CHOKE TYPE..................................................................................MECHANICAL

# CHOKE JET...........................................................................................#50

FLOAT ....................................................................................................3.5 gr.

GENERAL TECHNICAL SPECIFICATIONS

GPR MODELS

Were does the vacuum pipe from the tank conect to on the carburettor Submitted on 24-3-2022 at 09:43
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Derbi GPR 50cc 6 Speed Engine Manual

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