Ducati Scrambler Manual del usuario de medición y ajuste de válvulas - Página 3

Navegue en línea o descargue pdf Manual del usuario de medición y ajuste de válvulas para Motocicleta Ducati Scrambler. Ducati Scrambler 11 páginas.

Introduction

Bringing the valve clearances into factory specifications assures the best possible

performance of from your scrambler.

The Desmodromic (Desmo) engines use a positive valve control system to open and

close the valves at the same time in the combustion cycle regardless of RPM. The

Desmo valve system uses an opening rocker arm and a closing rocker arm that

press on shims attached to the valve stem to open and close the valve in a precisely

controlled manner: as the components wear, the gap (clearance) between the

rocker and the shim changes. To compensate for these naturally occurring changes,

the shims are replaced with thicker/thinner shims to bring the gap back into

specification.

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.

The shims don't wear as much as the valve seats

do. As the engine is run, the face of the valves

and seats wear as they bed into each other

(opener clearances get smaller and the closer

clearances get bigger). The result is opening and

closing clearances that change with use.

1. Valve

2. Closing Shim

3. Closing Rocker Arm

4. Retaining Clip

5. Opening Rocker Arm

6. Opening Shim

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