DECOMPRESSOR CLEARANCE INSPECTION/ADJUSTMENT (’05 — ’07)
Inspect and adjust the decompressor clearance while the engine is cold (below 35°C/95CF). |
Always inspect and adjust the decompressor clearance after adjusting the right exhaust valve clearance.
Remove the following:
- Cylinder head cover (page 9-7)
- Crankshaft hole cap (page 9-8)
Turn the crankshaft clockwise to align the punch mark on the primary drive gear with the index mark on the right crankcase cover. Make sure that the piston is at TDC (Top Dead Center) on the compression stroke.
This position can be obtained by confirming that there is slack in the rocker arms. If there is no slack, rotate the crankshaft clockwise one full turn and align the punch mark on the primary drive gear with the index mark on the right crankcase cover again.
Check that the index line on the cam sprocket aligns with the "Д" mark on the camshaft holder.
Measure the decompressor arm clearance by inserting a feeler gauge between the decompressor lifter arm adjuster and right side rocker arm.
DECOMPRESSOR CLEARANCE:
RIGHT SIDE EXHAUST VALVE CLEARANCE +
0.35 mm (0.014 in)
EXAMPLE:
If measured right exhaust valve clearance is 0.28 mm (0.011 in), decompressor clearance is;
0. 28 mm (0.011 in) + 0.35 mm (0.014 in) = 0.63 mm (0.025 in)
If decompressor clearance needs adjustment, see following procedure.
Measure the right exhaust valve clearance by inserting a feeler gauge between the right side rocker arm and shim.
VALVE CLEARANCE:
EX: 0.28 ± 0.03 mm (0.011 ± 0.001 in)
Pull out the feeler gauge between the rocker arm and shim.
Insert a feeler gauge (right exhaust valve clearance + 0.35 mm (0.014 in)) between the adjuster and right side rocker arm.
■ FEELER GAUGE |
ADJUSTER |
LOCK NUT |
Loosen the lock nut and turn the adjuster until there is a slight drag on the feeler gauge.
Hold the adjuster and tighten the lock nut.
TORQUE: 10 N m (1.0 kgf m, 7 Ibf ft)
Recheck the decompressor clearance.
Install the following:
- Crankshaft hole cap (page 9-39)
- Cylinder head cover (page 9-42)
DECOMPRESSOR SYSTEM (After '07)
DECOMPRESSOR WEIGHT |
PLUNGER |
Remove the cylinder head cover (page 9-7).
Make sure of the plunger operation using the following procedure:
1. Move the decompressor weight outward with your finger.
- The plunger operation is normal if it is retracted.
2. Release the decompressor weight.
- The decompressor weight should move inward automatically.
- The plunger operation is normal if it is protruded.
OIL FILLER CAP/ DIPSTICK |
UPPER LEVEL LINE |
Start the engine and let it idle for 3 minutes.
Stop the engine and wait 3 minutes.
Support the motorcycle upright on a level surface.
Remove the oil filler cap/dipstick and wipe the oil with a clean cloth.
Insert the dipstick without screwing it in, remove it and check the oil level.
If the oil level is below or near the lower level line on the dipstick, add the recommended engine oil to the upper level line through the oil filler hole.
LOWER LEVEL LINE
Other viscosities shown in the chart may be used when the average temperature in your riding area is within the indicated range |
-30 -20 -10 |
-20 |
Add the recommended engine oil to the upper level line. RECOMMENDED ENGINE OIL: Pro Honda GN4 4-stroke oil (U. S.A. and Canada) or equivalent motor oil API service classification: SG or Higher JASO T 903 standard: MA Viscosity: SAE 10W-30 OIL CAPACITY: 0.67 liter (0.71 US qt. 0.59 Imp qt) at draining 0.70 liter (0.74 US qt, 0.62 Imp qt) at oil filter change |
10 20 30 40 50"C |
20 40 60 80 100 120’F |
Install the oil filler cap/dipstick.