Ducati Scrambler Valve Measurement And Adjustment User Manual
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Ducati Scrambler Valve Measurement And Adjustment User Manual

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Scrambler
Valve Measurement and Adjustment User Guide
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Summary of Contents for Ducati Scrambler

  • Page 1 Scrambler Valve Measurement and Adjustment User Guide...

  • Page 2: Table Of Contents

    Determine if valves are within specification ................ 7 Opening Shim Removal, Measurement, Replacement ............. 7 Measure ..........................8 Record ........................... 8 Closing Shim Removal and Measurement ................8 Measure ..........................9 Reassembly ......................... 10 Appendix 1 – Ducati Scrambler Valve Measurement Recording Sheet ....... 11...

  • Page 3: Introduction

    Introduction The Scrambler engine is an updated version of Ducati’s classic SOHC V-twin. It is an air-and-oil cooled two-valve engine displacing 803cc. The valve service intervals are more frequent with the air/oil cooled engines; therefore the Scrambler Valve Adjustment Intervals are 7500 miles.

  • Page 4: Checking Valve Clearances

    http://www.ducatitoolrental.com/ Checking Valve Clearances Before the clearances can be checked there is some disassembly required. Try and have as little fuel as possible in the gas tank before beginning this procedure. It is easiest to measure all the clearances prior to disassembling the valve train to replace the shims.
  • Page 5 http://www.ducatitoolrental.com/ Working from vehicle left-hand side, loosen the two screws (3) and remove plug (1) from generator cover (2) Once the plug is removed from the generator cover, install the engine turning tool, making sure the tangs on the tool engage the indents on the crank shaft (4).

  • Page 6: Opening Shim Clearance Measurement

    http://www.ducatitoolrental.com/ OPENING SHIM CLEARANCE MEASUREMENT 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...

  • Page 7: Determine If Valves Are Within Specification

    http://www.ducatitoolrental.com/ Determine if valves are within specification. Determine if the clearances are within specification by comparing the measurements you recorded to the Factory Specification. Any measurement that exceeds Factory Specified Clearance will require changing a shim to bring the clearance back into Factory Specification. The basic sequence is: 1.

  • Page 8: Measure

    http://www.ducatitoolrental.com/ Remove the Opening shim (6) from the valve stem. Measure NOTE: The Opening Shim has a Flat side and a recessed side. Using light pressure, close the dial caliper all the way and “zero” the unit: hold the On/Off/Set button until all Zeros appear in the display.

  • Page 9: Measure

    Turn the caliper on. Close the jaws using light pressure. Select the unit of measure: either inch or mm. The shims are designated by Ducati in millimeters and using mm as the unit of measure simplifies new shim size selection. Press ZERO to set the base line for the caliper.

  • Page 10: Reassembly

    http://www.ducatitoolrental.com/ Reassembly Obtain the correct shim(s) and reassemble the valve train. Slide the closing shim onto the valve stem. The wider side slides onto the valve stem first. Depress the closing rocker and install the half rings (retaining rings). Do this with your finger or dip the end of the screwdriver in a little oil and use the screwdriver to install the half rings.

  • Page 11: Appendix 1 - Ducati Scrambler Valve Measurement Recording Sheet

    INTAKE If there is a clearance out of specification, that is the gap is larger than the Ducati Specified Clearance there is a little calculation to HORIZONTAL figure out the new shim size to bring the gap back into spec.

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