Sunday, 4 November 2012

AJS Model 31650 CSR Hurricane

Make Model
AJS Model 31 650
Air cooled, four stroke, pushrod parallel twin, OHV. 2 valve per cylinder,
Bore x Stroke72 x 79,3 mm72 x 72.8mm
Compression Ratio7,5 : 1
Ignition  /  Starting
6 Volt na 1964 12 Volt  Magnet (Lucas K2F)   /  kick
ClutchMulti Plate (dry, Burman)
Max Power
31,4 KW 43 hp @ 6000 rpm
Transmission  /  Drive
4 Speed  /  chain
FrameSingle cradle
Front Suspension
Hydraulic telescopic fork
Rear Suspension
Dual chocks
Front Brakes
Rear Brakes
Front Tyre
3.25 -19
Rear Tyre
3.50 -19
176 kg
Fuel Capacity 
16 Litres
The AJS Model 31 CSR designation officially stood for Competition / Sport / Road but it was dubbed the Coffee Shop Racer by its rivals.[4] With its distinctive 2 into 1 'siamese' exhaust system and upgraded camshafts the CSR was a high performance motorcycle but still prone to leaks and vibration.
The factory diverted Chief Engineer Jack Williams from AJS 7R development to address the problems and modify the bikes for racing - with the result that Ron Langston and Don Chapman won the prestigious Thruxton 500 long distance endurance race on the AJS Model 31. Encouraged by this victory in 1963 the AJS Model 31 gained the name Hurricane).[5] By 1966 the company were in financial trouble and production ended.

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