TT Mk VI - VIII
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| Racing Bikes TT Mk VI - VIII | |
| Production | KTT Mk VI: 1935 KTT Mk VII: 1938 KTT Mk VIII: 1938 - 50 |
|---|---|
| Class | Racing |
| Engine | Four stroke, single cylinder, OHC |
| Compression ratio | 7.8:1 |
| Ignition | Bobine |
| Transmission | 4 Speed, foot operated |
| Frame | Single cradle frame |
| Suspension | Front: Webb fork with two friction dampers Rear: KTT Mk VI & VII: None, spring loaded seat KTT Mk VIII: Swingarm with 2 shock absorbers, Oleo |
| Brakes | Front: 7 in. magnesium drums with single leading shoe Rear: 7 in. magnesium drums with single leading shoe |
| Weight | 125 kg / 275 lbs (dry), |
| Fuel Capacity | 11.4 L / 4 US gal |
| Manuals | Service Manual |
Engine[edit | edit source]
The engine was a Air cooled cooled Four stroke, single cylinder, OHC. The engine featured a 7.8:1 compression ratio.
Drive[edit | edit source]
Power was moderated via the Wet multi-plate.
Chassis[edit | edit source]
Stopping was achieved via 7 in. magnesium drums with single leading shoe in the front and a 7 in. magnesium drums with single leading shoe in the rear. The front suspension was a Webb fork with two friction dampers while the rear was equipped with a KTT Mk VI & VII: None, spring loaded seat KTT Mk VIII: Swingarm with 2 shock absorbers, Oleo. The TT Mk VI - VIII was fitted with a 11.4 L / 4 US gal fuel tank. The bike weighed just 125 kg / 275 lbs.
Photos[edit | edit source]
Overview[edit | edit source]
| Make Model | Velocette KTT Mk VI, KTT Mk VII, KTT Mk VIII |
|---|---|
| Year | KTT Mk VI: 1935 KTT Mk VII: 1938 KTT Mk VIII: 1938 - 50 |
| Engine Type | Four stroke, single cylinder, OHC |
| Displacement | 348.4 cc / 21.3 cub in |
| Bore X Stroke | 74 x 81 mm |
| Compression | 7.8:1 |
| Cooling System | Air cooled |
| Lubrication | Dry sump |
| Exhaust | Single, chrome |
| Carburetor | Amal |
| Ignition | Bobine |
| Starting | Kick start |
| Max Power | 25.7 kW / 35 hp @ 5800 rpm (Mk VIII) |
| Clutch | Wet multi-plate |
| Transmission | 4 Speed, foot operated |
| Final Drive | Chain |
| Frame | Single cradle frame |
| Front Suspension | Webb fork with two friction dampers |
| Rear Suspension | KTT Mk VI & VII: None, spring loaded seat KTT Mk VIII: Swingarm with 2 shock absorbers, Oleo |
| Front Brakes | 7 in. magnesium drums with single leading shoe |
| Rear Brakes | 7 in. magnesium drums with single leading shoe |
| Front Wheel | WM1 x 21 in. (Mk VIII) |
| Rear Wheel | WM2 x 19 in. (Mk VIII) |
| Fuel Capacity | 11.4 L / 4 US gal |
| Dry Weight | 125 kg / 275 lbs |
| Maximum Speed | 185 km/h / 115 mph (Mk VIII) |
| Colours | Black with gold pin striping |
| Source | Wikipedia, Bonhams |