Norton 961 Throttle Control, TPS and Idle Control Solenoid Guide
Download the complete PDF version using the green download button at the top right of this page for Richard Coote’s illustrated Norton 961 throttle control guide. This technical reference explains the throttle position set screw, the Throttle Position Sensor, correct starting behavior, cable lubrication and removal of the idle control solenoid. It is especially useful when diagnosing erratic running, stalling when returning to idle, surging while cruising or throttle-related setup concerns on the Norton 961.
The guide begins by explaining that the 961 idle speed is controlled by the ECU, while the throttle position set screw prevents the butterfly flaps from closing completely. It also stresses the importance of turning the key on without touching the throttle, allowing the ECU and TPS to establish the correct closed-throttle reference before starting the motorcycle.
Later pages show how to adjust the throttle position set screw, add a locking nut, lubricate the throttle cables and remove the TPS for inspection or replacement. The final section covers the idle control solenoid, including hose removal, electrical plug disconnection, bracket position, carbon build-up inspection and the need to check for air leaks when reassembling the unit.
Contents Include
- Norton 961 throttle control system overview
- Throttle position set screw purpose and adjustment
- ECU idle control explanation
- Correct key-on and cold-start procedure
- Adding a lock nut to secure the set screw
- Throttle cable lubrication points
- Throttle Position Sensor location and removal
- TPS replacement and dielectric grease note
- Temporary TPS fault-check method for surging or erratic running
- Idle control solenoid removal and cleaning
- Head temperature sensor caution
- Air leak checks during reassembly
