Remove its single retaining screw and carefully prise the impulse transmitter out of the final drive case. Renew its sealing 0-ring if worn or damaged and wipe the unit clean of oil and any dirt or foreign matter. Check it for signs of damage.
On refitting, tighten the retaining screw securely but do not over tighten it.
Next Section: 6. Renew the air filter element
Speedometer impulse transmitter must be removed at regular intervals for cleaning