Inspecting Camshafts; Camshaft Toothed Wheel Check; Camshaft Lobes - APRILIA RSV4 R Service Station Manual

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Install the specific camshaft gear sup-

Fix it to the head using the two screws

Move the gear from the camshaft to the

Specific tooling

020865Y Support for camshaft gear on head

Unscrew and remove the eight screws

(2), proceeding in stages and diago-

Retrieve the washers from the screws

near the spark plug holes.

Remove the U bolts with the O rings

and locator pins.

Remove the intake and exhaust cam-

If the two camshafts are timed correctly, the ex-

haust camshaft gear tooth (indicated with a dot) is

meshed with the trough of the intake camshaft

gear (indicated with two dots).

Inspecting camshafts

Check that the camshaft gear works properly: if it is damaged or does not move smoothly,

replace the timing chain and the camshaft gear.

Check that they do not show blue colouring, cracks or scratches; otherwise, replace the

camshaft, gear and chain.

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