Bypass Valve Adjustment

By-pass valve adjustment, checking

NOTE: The by-pass valve controls the boost pressure. It is adjusted at the factory and must not be changed. Use the following check to determine if the by-pass valve adjustment has been inadvertently altered.




- attach protractor 3084 to throttle shaft using magnetic adaptor 3084/1
- fasten protractor pointer to throttle cable sleeve using circlip
- using screwdriver, push throttle lever to full throttle stop
- with throttle in this position, set protractor to 10°




- slowly close throttle until lever 1 just makes contact with lever 2 (arrow)
- read value on protractor
- must be 5 ± 3° before full throttle stop

If NO
- adjust by-pass valve on connecting rod 3

NOTE: For full throttle switch checking/adjusting, Testing and Inspection