Valve Clearance Measurement

Warning - General - Stabilise Motorcycle

warning
Make sure the motorcycle is stabilised and adequately supported.A correctly supported motorcycle will help prevent it from falling.An unstable motorcycle may fall, causing injury to the operator or damage to the motorcycle.
note
Valve clearance measurement must be carried out with the engine cold.When replacing a valve shim, always refer to the EPC.For valve clearance specifications (see Cylinder Head).
  1. Remove the camshaft cover (see Camshaft Cover - Removal).
  2. Remove the spark plugs to reduce compression resistance when turning the engine.
  3. Select a high gear and, using the rear wheel, turn the engine until a pair of camshaft lobes are positioned pointing away from the valves.
  4. Using feeler gauges, measure and record the clearances for this pair of valves only.
  5. Repeat the process until the valve clearances for all valves have been checked.
    6. note
    If the measurement does not fall within the specified range, adjustment must be made.
    caution
    If the valve clearances are not checked and corrected, wear could cause the valves to remain partly open, which lowers performance, burns the valves and valve seats and may cause serious engine damage.
  6. Record the measured valve clearances on a chart similar to the example shown.

Typical Valve Clearance Chart

Inlet Valve No.

Gap Measured

1

as measured (mm)

2

as measured (mm)

3

as measured (mm)

4

as measured (mm)

5

as measured (mm)

6

as measured (mm)

Exhaust Valve No.

Gap Measured

1

as measured (mm)

2

as measured (mm)

3

as measured (mm)

4

as measured (mm)

5

as measured (mm)

6

as measured (mm)