Checking for top dead centre (TDC)
- Use a Torx key to open the inspection cover on the alternator cover.
- Remove the drive belt cover and its damping material.
- Remove the rocker cover on the cylinder head.
- Rotate the crankshaft at the pulley until the marking at the magnet holder points to the marking on
the alternator cover (TDC).
- Make sure that the marking at the camshaft sensor points to the marking on the cylinder head.
If it points in the opposite direction, then rotate the crankshaft through 360º again.
Checking and adjusting the valve clearances
- Only check and adjust the valve clearances when the engine is cold.
- Before checking the valve clearances ensure that you have obtained top dead centre as described in
the section above.
- Use a feeler gauge and insert it in the gap between the valve adjuster and the valve. If one or more
gaps deviate from the clearances specified below, then adjust the inlet and exhaust sides of the
cylinder head accordingly. Loosen the locknut and turn the adjuster as depicted in the diagram.
- Inlet valve: 0.15 mm (cold)
- Exhaust valve: 0.15 mm (cold)
Checking engine compression
- On a cold engine, remove the spark plug cap.
- Unscrew the spark plug.
- Using a 10 mm adapter, screw a compression gauge into the plug hole and tighten down to the
correct torque.
- Press the starter, and with the twistgrip open at full throttle rotate the crankshaft until the
compression gauge readings no longer fluctuate. Check if the reading equals the prescribed value of
8 1 bar. If so, then remove the compression gauge and screw the spark plug back in.
- If the readings are lower, then check the engine speed when you press the starter. If the engine
speed is less than 450 rpm, then check the electric starter. If the engine speed is equal to the above
value or slightly higher, i.e. is correct, then check for correct valve timing.
- Check if the correct barrel gasket has been fitted.
- Check for worn piston rings, sticking valves etc.
Torque setting:
Compression gauge adapter: 10 Nm
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