| Specification |
Engine: |
Configuration: | Parallel twin |
Capacity: | 649cc |
Bore x Stroke: | 71mm x 82mm |
Compression: | 8.5:1 |
Transmission: |
Gears: | 4 |
Clutch: | wet multi plate |
Performance: |
Max. Power: | 46bhp @ 6500rpm |
Cycle Parts: |
Frame: | Tubular twin cradle |
Front Wheel: | Dunlop WM2 chrome rim |
Rear Wheel: | Dunlop WM3 chrome rim |
Front Tyre: | 3.25 x 19 |
Rear Tyre: | 4.00 x 18 |
Front Suspension: | Telescopic |
Rear Suspension: | Girling hydraulic |
Front Brakes: | 8" drum full width SLS |
Rear Brakes: | 7" drum fully floating SLS |
Dimensions: |
Length: | 2135mm |
Seat Height: | 775mm |
Wheelbase: | 1396mm |
Dry Weight: | 165kg |
Fuel Tank: | 18l |
The unit construction 650 B range commenced after the annual summer break in August 1962. Pre-production machines DU101-108 were completed on 29 September 1962. Production for real commenced on 13 November 1962.
Although manufactured in 1962 the model year was 1963.
Somewhat a hybrid motorcycle due to the many parts used from the pre-unit models - forks, wheels, guards, petrol tank each modified to fit the new unit design. Road tested by Hot Rod Magazine in the USA June 1963 showing 115 MPH. We had to wait for the 1964 model to lose the pre-unit items.
Profile created by Terry MacDonald on 08/12/2009. Last edited by Laurence Mee on 30/04/2010.
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