Technical specifications
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| Model: |
GTP |
| Years: |
1930-46 |
|
Engine:
|
Two-stroke, Single cylinder
|
|
Capacity:
|
249 cc / 15.2 cub in
|
|
Bore x Stroke:
|
63 x 80 mm
|
|
Compression Ratio:
|
6.5:1
|
|
Cooling System:
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Air cooled
|
|
Lubrication:
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Dry sump
|
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Carburetor:
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Amal, twist grip control
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Exhaust:
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1-into-2, chrome plated silencers with fish tail mufflers
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Ignition:
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Coil in conjunction with Miller
|
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Starting:
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Kick start
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Clutch:
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Wet multi-plate
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Transmission:
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Early models: 3 Speed, hand operated Later models: 4 Speed, foot operated
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Final Drive:
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Chain
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Gear Ratios (3-speed):
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1st 13.5 / 2nd 7.7 / 3rd 5.33:1
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Wheelbase:
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1270 mm / 50 in
|
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Seat height:
|
686 mm / 27 in
|
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Ground Clearance:
|
140 mm / 5.5 in
|
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Front Suspension:
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Webb fork with shock absorber and steering damper
|
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Rear Suspension:
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None, spring loaded seat
|
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Front Brakes:
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6 in. drum, internal expanding
|
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Rear Brakes:
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6 in. drum, internal expanding
|
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Wheels:
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Spokes
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Front Tyre:
|
3 x 25 in., Avon
|
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Rear Tyre:
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3 x 25 in., Avon
|
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Fuel Capacity:
|
6.6 L / 1.75 US gal
|
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Dry Weight:
|
101 kg / 222 lbs (light set included)
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Colours:
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Black with gold pin striping
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Source:
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Wikipedia, Bohams
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