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James Colonel K12. 225cc. 1954-1956

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Frame numbering  (1954)  K12-000101.  (1955) 55K12-xxx.  (1956) 56K12-xxx. 
(1957) 57K12-xxx.
Engine Villiers Mk 1H. Capacity 224cc.  63mm x 72mm
Gears Three speed
Frame Single downtube with swinging-arm rear.
Forks Telescopic.
Tyres 1954 - 55  3.00" x 19".   1956 - 57  3.25" x 18"
Tyre pressures  
Wheel rims Dunlop WM2 36 hole
Ignition timing " before top dead centre.
Points gap 0.015"
Plug gap  
Plug type  
Carburettor Villiers S25  1 3/16" inlet bore
Jet size No. 120 std. 
Needle No. 3
Throttle slide No. 3 std.
Tank capacity 2 gallons.  Use of unleaded fuel will cause no problems
Petroil mixture 20:1 as originally specified. Can be safely reduced to 24:1 with modern oils.
Gearbox capacity  Fill to dip stick mark.
Chaincase capacity Fill to drain plug level
Chains Primary chain:  60 pitches
Final drive chain: 125 pitches  " x 0.335" x 0.305" wide.
Sprockets Engine: (crankshaft) 20 teeth.  ⅜" pitch.
Gearbox (final drive) 18 teeth " pitch. Villiers part no. E9106.  17 teeth for sidecar. Villiers part no. E8160.
Brakes 6" front & rear
Bulbs Main bulb:  6v - 24 /24w. Pre-focussed.
Tail lamp:  6v - 18 / 3w
Parking lamp bulb: 6v - 3w.
Battery Lucas type PUZ7E-9.  6 volt.  12 Amp-hour.
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