Warning!
- The throttle grip controls the throttle valves in the throttle bodies. If the throttle cables are incorrectly adjusted, either too tight or too loose, the throttle may be difficult to control and performance will be adversely affected.
- Check the throttle grip free-play in accordance with scheduled maintenance requirements and make adjustments as necessary.
- Always be alert for changes in the 'feel1 of the throttle and have the throttle system checked by an authorised Triumph dealer if any changes are detected. Changes can be due to wear in the mechanism, which could lead to a sticking throttle.
- An incorrectly adjusted, sticking or stuck throttle will lead to loss of motorcycle control and an accident.
Removal
Note: Prior to removal, clearly identify the opening and closing cables so that they may be refitted in the correct positions.
1. Remove the rider's seat.
2. Disconnect the battery negative (black) lead first.
3. Raise and prop the fuel tank as described on page 11.98.
4. Remove the intake cover as described on page 11.98.
5, Remove the headstock cover.
6. Slacken the adjuster locknuts at the throttle body such that they will allow the outer cables to be detached from the cable brackets.
1. Opening cable adjuster; 2. Closing cable adjuster; 3. Locknuts
7. Detach the inner cables from the throttle cam.
8. At the twist grip end, remove the screws securing the right hand switch cube to the brake master cylinder.
1. Right hand switch cube; 2. Screws
9. Separate the switch cube from the master cylinder.
10. Release the screw and union securing the throttle cables to the master cylinder.
1. Throttle cables; 2. Screw; 3. Union
11. Release, but do not remove completely, the two screws securing the master cylinder to the handlebar.
1. Master cylinder; 2. Screws
12. Ease the master cylinder away from the handlebar to allow space for the throttle cables to be detached from the twist grip. Detach the cables from the twist grip.
1. Twist grip; 2. Throttle cables
13. Note the routing of the throttle cables, then remove them from the frame.
Examination
1. Check that the throttle cables operate smoothly, without sticking or binding. Replace the cable if there is any doubt as to its correct operation.
Installation
Note: The opening and closing cables must be correctly identified and fitted to the correct positions as noted prior to removal.
1. Locate the cables to the frame following the routing noted during removal.
2. Engage the nipples of the inner cables to the twist grip.
3. Locate the master cylinder to the handlebars.
4. Position the clamp to the rear side of the handlebars.
5. Align the master cylinder/clamp split line with the dot mark on the underside of the handlebar.
1. Split line; 2. Dot mark
6. Tighten the master cylinder clamp bolts, upper first and then the lower to 15 Nm.
7. Assemble the switch cube to the master cylinder, tightening the two screws to 4 Nm.
8. Attach the cable retainer screw and union to the master cylinder, tightening both to 3 Nm.
1. Throttle cables; 2. Retainer screw; 3. Union
9. Attach the other end of the inner cables to the throttle cam and locate the outer cables to the cable bracket. Ensure the opening and closing cables are located to the correct cams then fit the cable locknuts.
1. Opening cable adjuster; 2. Closing cable adjuster; 3. Locknuts
Warning! Operation of the motorcycle with an incorrectly adjusted, incorrectly routed or damaged throttle cable could interfere with the operation of the brakes, clutch or the throttle itself. Any of these conditions could result in loss of control of the motorcycle and an accident.
Warning! Move the handlebars to left and right full lock while checking that cables and harnesses do not bind. A cable or harness that binds will restrict the steering and may cause loss of control and an accident.
10. Refit the headstock cover.
11. Support the tank, remove and stow the tank prop, then lower the tank to the frame and secure it as described on page 11.99.
12. Refit the intake cover (see page 11.99).
13. Reconnect the battery, positive (red) lead first.
14. Refit the rider's seat as described on page 17.9.
15. Set the cable adjustment using the adjustment instructions that follow:
Throttle cable adjustment
1. When correctly set, the throttle must have 2-3 mm of free-play at the throttle twist grip. If there is more or less than 2-3 mm of free-play present, the throttle cables must be adjusted.
1. Throttle twist grip; 2. 2-3 mm
If there is an incorrect amount of free-play, adjustment may be made as follows:
Warning!
- Use of the motorcycle with incorrectly adjusted, incorrectly routed, sticking or damaged throttle cables will interfere with the throttle function resulting in loss of motorcycle control and an accident.
- To avoid incorrect adjustment, incorrect routing, or continued use of a sticking or damaged throttle, always have your throttle checked and adjusted by your authorised Triumph dealer.
1. Opening cable adjuster; 2. Closing cable adjuster; 3. Locknuts; 4. Closing cable - free play measurement point; 5. Opening cable - free play measurement point
2. Remove the intake and headstock covers if not already removed.
3. Release the locknut on the 'opening' cable adjuster.
4. Rotate the 'opening1 cable adjuster at the twist grip end such that it has an equal amount of adjustment tn each direction.
5. Rotate the 'opening1 cable adjuster at the throttle body end of the cable to give 2-3 mm of play at the twist grip. Tighten the locknut.
6. Make any minor adjustments as necessary to give 2-3 mm of play using the adjuster near the twist grip end of the cable. Tighten the locknut.
7. With the throttle fully closed, ensure that there is 2-3mm of free play in the 'closing' cable at the throttle cam attached to the throttle bodies. If necessary, adjust in the same way as the 'opening' cable until 2-3 mm of play is present.
Warning!
- Ensure that all the adjuster locknuts of both cables are tightened, as a loose locknut could result in a sticking throttle.
- An incorrectly adjusted, sticking or stuck throttle can lead to loss of motorcycle control and an accident.
8. Refit the intake cover, tightening the screws to 9 Nm.
9. Check that the throttle opens smoothly, without undue force and that it closes without sticking. Rectify as necessary.
Warning! Operation of the motorcycle with an incorrectly adjusted, incorrectly routed or damaged throttle cable could interfere with the operation of the brakes, clutch or the throttle itself. Any of these conditions could result in loss of control of the motorcycle and an accident.
Warning! Move the handlebars to left and right full lock while checking that cables and harnesses do not bind. A cable or harness that binds will restrict the steering and may cause loss of control and an accident.