Yamaha Fz6 N Service Manual

3
PERIODIC CHECKS AND ADJUSTMENTS
PERIODIC MAINTENANCE......................................................................... 3-1
INTRODUCTION ........................... ......................................................... 3-1
ENGINE ......................................................................................................... 3-4
ADJUSTING THE VALVE CLEARANCE ................................................ 3-4
SYNCHRONIZING THE THROTTLE BODIES ..........................................

ELECTRICAL SYSTEM.............................................................................. 3-35
REPLACING THE HEADLIGHT BULBS............................................... 3-35
ADJUSTING THE HEADLIGHT BEAMS .............................................. 3-35 

PERIODIC MAINTENANCE
3-1
EAS20450
PERIODIC MAINTENANCE
EAS20460
INTRODUCTION
This chapter includes all information necessary to perform recommended checks and adjustments. 
If followed, these preventive maintenance procedures  will ensure more reliable vehicle operation, a 
longer service life and reduce the need for costly ov erhaul work. This information applies to vehicles 
already in service as well as to new vehicles that  are being prepared for sale. All service technicians 
should be familiar...

PERIODIC MAINTENANCE
3-2
13 Drive chain Check chain slack, alignment and 
condition.
 Adjust and lubricate chain with a  special O-ring chain lubricant thor-
oughly. Every 1000 km and after wash-
ing the vehicle or riding in the  rain
14 * Steering bear-
ings  Check bearing play and steering for 
roughness. √√√√√
 Lubricate with lithium-soap-based  grease. Every 20000 km
15 * Chassis fasten-
ers  Make sure that all nuts, bolts and 
screws are properly tightened. √√√√ √
16 Sidestand, cen-
terstand ...

PERIODIC MAINTENANCE
3-3
NOTE:
 Air filter This model’s air filter is equipped with a disposable oil-coated paper element, which must not be  cleaned with compressed air to avoid damaging it.
 The air filter element needs to be replaced more  frequently when riding in unusually wet or dusty 
areas.
 Hydraulic brake service
 Regularly check and, if necessary, correct the brake fluid level.
 Every two years replace the internal components of the brake master cylinders and calipers, and  change the...

ENGINE
3-4
EAS20470
ENGINE
EAS20490
ADJUSTING THE VALVE CLEARANCE
The following procedure applies to all of the 
valves.
NOTE:
 Valve clearance adjustment should be made 
on a cold engine, at room temperature.
 When the valve clearance is to be measured  or adjusted, the piston must be at top dead 
center (TDC) on the compression stroke.
1. Remove: Seat Refer to GENERAL CHASSIS on page 4-
1.
 Fuel tank
Refer to FUEL TANK on page 7-1.
 Battery Refer to GENERAL CHASSIS on page 4-
1 and CHECKING AND...

ENGINE
3-5
d. To measure the valve clearances of the other cylinders, starting with cylinder #1 at 
TDC, turn the crankshaft counterclockwise 
as specified in the following table.
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5. Remove: Camshafts
NOTE:
 Refer to CAMSHAFTS on page 5-8.  When removing the timing chain and cam-
shafts, fasten the timing chain with a wire to 
retrieve it if it falls into the crankcase.
6. Adjust:  Valve clearance
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a. Remove the valve lifter “1” and the...

ENGINE
3-6
 Since valve pads of various sizes are origi-nally installed, the valve pad number must be 
rounded in order to reach the closest equiva-
lent to the original.
c. Round off the original valve pad number  according to the following table.
EXAMPLE:
Original valve pad number = 148 (thickness 
= 1.48 mm (0.058 in))
Rounded value = 150
d. Locate the rounded number of the original  valve pad and the measured valve clear-
ance in the valve pad selection table. The 
point where the column and row...

ENGINE
3-7
 Air filter caseRefer to GENERAL CHASSIS on page 4-
1.
3. Install:  Vacuum gauge “1”
(onto the synchronizing hose “2”)
4. Install:  Air filter case
Refer to GENERAL CHASSIS on page 4-
1.
 Fuel tank Refer to FUEL TANK on page 7-1.
5. Start the engine and let it warm up for sev- eral minutes.
6. Check:
 Engine idling speed Out of specification  → Adjust.
Refer to ADJUSTING THE ENGINE 
IDLING SPEED on page 3-9.
7. Adjust:  Throttle body synchronization
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a....