Opening Shim Clearance Measurement; Closing Shim Clearance Measurement - Ducati Scrambler Valve Measurement And Adjustment User Manual

OPENING SHIM CLEARANCE MEASUREMENT

Record measurements in APPENDIX 1.

CLOSING SHIM CLEARANCE MEASUREMENT

cylinder have been measured.
Repeat the measurements for the vertical cylinder:
Slowly rotate the engine turning tool counter clockwise 270 degrees to bring the
vertical cylinder to top dead center. When the vertical cylinder is on the
compression stroke, the air will rush out of the cylinder; a thumb or finger lightly
covering the spark plug hole is a good way to feel the air rushing out. Using the
magnet and slight adjustments with the engine turning tool, you will quickly locate
the TDC of the vertical cylinder. Repeat the measurements for the opening and
closing clearances and record those readings in APPENDIX 1.
http://www.ducatitoolrental.com/
With the valve in the "rest"
position, slide the feeler gauge
between the opening rocker
arm and the opening shim.
Begin measuring using a thin
gauge, ~ .05mm; proceed using
thicker/thinner gauges until the
gap can be determined. The
correct feeling is one of slight
resistance, similar to the feeling
of inserting the gauge into a
large book and moving it
between the pages.
Measure the valve clearances
for both the intake valve (middle
of the "vee,) and the exhaust
side (where the exhaust exits the
cylinder head).
Once the opening clearances
have been measured, measure
and record the closing
clearances.
Slide a feeler gauge between
the closing rocker arm and the
closing shim to measure the
clearance.
Record your measurements in
APPENDIX 1.
The clearances for the horizontal
6