“The TTI gearbox I bought off you is great. I raced at Manfield at the weekend and it was wonderful! I even dropped my lap times down! It’s a great gearbox!”
Mike Sharp, Gisborne, New Zealand.
The brilliance of TTI motorcycle gearboxes is that they are strong and reliable and quick changing giving racers a competitive edge.
The Choice of Champions – Used by World 500cc Grand Prix Champion, Kevin Schwantz!
AMC aluminium casing with kick-start
AMC magnesium casing with no kick-start
AMC GEARBOXES
- Is available in a kick start option
- Standard boxes are all heavy duty
- Aluminium or magnesium casing option
- Manx or Commando input shaft (CLICK HERE for drawings of both options)
- Selector drum rotation options (CLICK HERE for CW or CCW options)
- Each gearbox comes with one sprocket chosen from 16T to 23T
- Available in AMC 6 Speed, AMC XHD 5 Speed, AMC 5 Speed, AMC 4 Speed, AMC XHD 4 Speed also available but please contact us for details.
AMC 6 Speed
Standard: 1st: 2.294, 2nd 1.755, 3rd 1.418, 4th 1.243, 5th: 1.1, 6th: direct
Low: 1st: 2.438, 2nd: 1.755, 3rd: 1.418, 4th: 1.243, 5th: 1.1, 6th: direct
Close: 1st: 2.169, 2ND: 1.69, 3RD: 1.418, 4th: 1.243, 5th: 1.1, 6th: direct
AMC XHD 5 SPEED
Standard: 1st: 2.438, 2nd: 1.75, 3rd: 1.379, 4th: 1.144, 5th: direct
Close: 1st: 2.209, 2nd: 1.661, 3rd: 1.379, 4th: 1.144, 5th: direct
AMC 5 Speed
Standard: 1st: 2.294, 2nd: 1.69, 3rd: 1.356, 4th: 1.144, 5th: direct
Alternative low and close ratio: Available for 1st gear please ask
AMC 4 Speed
Standard: 1st: 2.178, 2nd: 1.46, 3rd: 1.176, 4th: direct
Option: 1st: 1.96, 2nd: 1.46, 3rd: 1.176, 4th: direct
Close: 1st: 1.89, 2nd: 1.4, 3rd: 1.13, 4th: direct
Motocross: 1st: 1.89, 2nd: 1.52, 3rd: 1.237, 4th: direct (always has kick-start)
BSA 6 Speed: 1st: 2.298, Low 1st: 2.38, Alternative Low 1st: 2.48, 2nd: 1.78, 3rd: 1.47, 4th: 1.26, 5th 1.103, 6th: direct
BSA 5 Speed: 1st: 2.298, Low speedo drive 1st: 2.39, 2nd: 1.69, 3rd: 1.34, 4th: 1.136, 5th: direct
BSA GEARBOXES
Built on the same selector cassette principle as the world beating AMC and Burman gearboxes that have been top sellers worldwide, using ball and roller metric bearings.
- Available in kickstart and with selector drum options with aluminium casing.
- Tapered and splined input shaft options.
- Available in BSA 6 Speed and BSA 5 Speed.
BSA 6 Speed
1st: 2.298, Low 1st: 2.38, Alternative Low 1st: 2.48, 2nd: 1.78, 3rd: 1.47, 4th: 1.26, 5th 1.103, 6th: direct
BSA 5 Speed
1st: 2.298, Low speedo drive 1st: 2.39, 2nd: 1.69, 3rd: 1.34, 4th: 1.136, 5th: direct
LW55 6 Speed: 1st: 2.298, Low 1st: 2.38, Alternative Low 1st: 2.48, 2nd: 1.78, 3rd: 1.47, 4th: 1.26, 5th 1.103, 6th: direct
LW55 GEARBOX
Available in 6 speed in magnesium casing in racing format only. Feature prominently in motorcycles of riders achieving top places at the Isle of Mann Classic TT due to superior performance and being lightweight.
LW55 6 Speed
1st: 2.298, Low 1st: 2.38, Alternative Low 1st: 2.48, 2nd: 1.78, 3rd: 1.47, 4th: 1.26, 5th 1.103, 6th: direct
B.A.R MOTORCYCLE GEARBOX
Available in magnesium casing. Talk to us for further information.
STANDARD B.A.R RATIOS 4 SPEED
1st: 1.96, 2nd: 1.40, 3rd: 1.13, 4th: direct
Also available in the following ratios:
6 SPEED
Standard: 1st: 2.294, 2nd 1.755, 3rd 1.418, 4th 1.243, 5th: 1.1, 6th: direct
Low: 1st: 2.438, 2nd: 1.755, 3rd: 1.418, 4th: 1.243, 5th: 1.1, 6th: direct
Close: 1st: 2.169, 2ND: 1.69, 3RD: 1.418, 4th: 1.243, 5th: 1.1, 6th: direct
XHD 5 SPEED
Standard: 1st: 2.438, 2nd: 1.75, 3rd: 1.379, 4th: 1.144, 5th: direct
Close: 1st: 2.209, 2nd: 1.661, 3rd: 1.379, 4th: 1.144, 5th: direct
5 SPEED
Standard: 1st: 2.294, 2nd: 1.69, 3rd: 1.356, 4th: 1.144, 5th: direct
Alternative low and close ratio: Available for 1st gear please ask.
4 SPEED
Standard: 1st: 2.178, 2nd: 1.46, 3rd: 1.176, 4th: direct
Option: 1st: 1.96, 2nd: 1.46, 3rd: 1.176, 4th: direct
Close: 1st: 1.89, 2nd: 1.4, 3rd: 1.13, 4th: direct
BURMAN MOTORCYCLE GEARBOX
Burman box standard in Matchless G45 and AJS 7R 1953 – 1956 motorcycles. Available in magnesium casing. Ask us about options.
6 SPEED
Standard: 1st: 2.294, 2nd 1.755, 3rd 1.418, 4th 1.243, 5th: 1.1, 6th: direct
Low: 1st: 2.438, 2nd: 1.755, 3rd: 1.418, 4th: 1.243, 5th: 1.1, 6th: direct
Close: 1st: 2.169, 2ND: 1.69, 3RD: 1.418, 4th: 1.243, 5th: 1.1, 6th: direct
XHD 5 SPEED
Standard: 1st: 2.438, 2nd: 1.75, 3rd: 1.379, 4th: 1.144, 5th: direct
Close: 1st: 2.209, 2nd: 1.661, 3rd: 1.379, 4th: 1.144, 5th: direct
5 SPEED
Standard: 1st: 2.294, 2nd: 1.69, 3rd: 1.356, 4th: 1.144, 5th: direct
Alternative low and close ratio: Available for 1st gear please ask.
4 SPEED
Standard: 1st: 2.178, 2nd: 1.46, 3rd: 1.176, 4th: direct
Option: 1st: 1.96, 2nd: 1.46, 3rd: 1.176, 4th: direct
Close: 1st: 1.89, 2nd: 1.4, 3rd: 1.13, 4th: direct
T120/T150 – 5 Speed Standard Ratios: 1st: 2.39, alternative 1st: 2.298, 2nd: 1.69, 3rd: 1.34, 4th: 1.136, 5th: direct
T120/T150 – 6 Speed Standard Ratios: 1st: 2.39, alternative 1st: 2.298, 2nd: 1.78, 3rd: 1.47, 4th: 1.26, 5th: 1.103, 6th: direct T
TRIUMPH MOTORCYCLE GEARBOX
For T120/T150 and T140/T160 motorcycles and Rocket 3. Available with kick start options. Only available in aluminium cases.
T120/T150 – 5 Speed Standard Ratios
1st: 2.39, alternative 1st: 2.298, 2nd: 1.69, 3rd: 1.34, 4th: 1.136, 5th: direct
T120/T150 – 6 Speed Standard Ratios
1st: 2.39, alternative 1st: 2.298, 2nd: 1.78, 3rd: 1.47, 4th: 1.26, 5th: 1.103, 6th: direct
THE COMPETITIVE EDGE
TTI motorcycle gearboxes are the culmination of inventor and TTI founder Bruce Verdon’s passion for racing and engineering skill which saw him combine both to create the magic that the TTI motorcycle race gearbox delivers. Using a fresh design approach, he has built a completely new and modern, quick-changing and robust gearbox.
TTI manufactures 4, 5 and 6 speed heavy duty (standard) gearboxes for AMC, BSA, Burman and Triumph or similar classic motorcycles. There is also a 4 and 5 speed extra heavy duty gearbox suitable for motorcycles such as the big bore Norton Commando, or similar high powered racing motorcycles as well as a special light weight option only for racing. Kick-start options, left and right hand gear changes and gear direction change options are available in most cases with gearbox casings commonly provided in either heat treated aluminium or magnesium.
TT Industries gearboxes feature prominently in the Isle of Mann Classic TT competitions, with many riders with TTI gearboxes placed in the top 20 most years.
“I have found over the years that your boxes are the best out there even on my 100 plus bhp Weslake. Once again thank you for your help,”