2-28 PERIODIC MAINTENANCE

Periodic Maintenance Procedures

•Start the engine and run it at idle speed.

•Plug the air switching valve hose end [A] with your finger and feel vacuum pulsing in the hose.

If there is no vacuum pulsation, check the hose line for leak. If there is no leak, check the air switching valve (see Air Switching Valve Unit Test in the Electrical System chapter) or air suction valve (see Air Suction Valve Inspection in the Engine Top End chapter).

Clutch

Clutch Operation Inspection

•Pull the clutch lever just enough to take up the free play [A].

•Measure the gap between the lever and the lever holder. If the gap is too wide, the clutch may not release fully. If the gap is too narrow, the clutch may not engage fully. In either case, adjust it.

Clutch Lever Free Play

Standard: 2 3 mm (0.08 0.12 in.)

WARNING

To avoid a serious burn, never touch the engine or exhaust pipe during clutch adjustment.

•Turn the adjuster [A] so that 4 6 mm (0.16 0.24 in.) [B] of threads is visible.

•Slide the dust cover [A] at the clutch cable lower end out of place.

•Loosen both adjusting nuts [B] at the bracket [C] on the clutch cover as far as they will go.

•Pull the clutch outer cable [D] tight and tighten the adjusting nuts against the bracket.

•Slip the dust cover back onto place.

•Turn the adjuster at the clutch lever until the free play is correct.