| Specification |
Engine: |
Configuration: | Air-cooled 4-stroke vertical twin |
Capacity: | 490cc |
Bore x Stroke: | 69mm x 65.5mm |
Compression: | 7:1 |
Transmission: |
Gears: | 4 |
Performance: |
Max. Power: | 27bhp @ 6500rpm |
Cycle Parts: |
Frame: | Single down-tube |
Front Wheel: | 3.25 x 17 |
Rear Wheel: | 3.25 x 17 |
Front Suspension: | Telescopic forks |
Rear Suspension: | Swinging arm |
Front Brakes: | 7in single leading shoe |
Rear Brakes: | 7in single leading shoe |
Dimensions: |
Length: | 2030mm |
Seat Height: | 724mm |
Wheelbase: | 1314mm |
Dry Weight: | 159kg |
Fuel Tank: | 16l |
This model re-introduced the famous Speed Twin name that had been so successful on previous 500cc machines, and was effectively a bored-out version of the Twenty-one (3TA). It retained all the fairings, running gear, and frame - though the finishing was distinctive in Amaranth Red to associate it with the older pre-unit Speed Twin models.
As with the 3TA, in 1964 the bathtub fairing was changed for the smaller 'bikini' fairing, exposing the rear wheel. Then in 1965 the 'roman helmet' front mudguard was changed to a slimmer design. Then in 1966 they lost the panels altogether, but were soon superceded by the T100SS.
Profile created by Laurence Mee on 30/04/2010. Last edited by Laurence Mee on 30/04/2010.
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