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Yamaha XV750 Virago Manual

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Chapter 1 Tune-up and routine maintenance
1-21
18.7a Remove the cover
bolts (arrows)...
18.7b ... and lift the cover off
18.8 Unscrew the timing plug (upper
arrow) and the crankcase cover plate
(lower arrow)
18.9a The timing mark for the rear cylinder is the line next to
the "T" on the alternator rotor; align it with the notch inside
the hole (arrow)
removed and lubricated whenever the throttle cables are lubricated.
Refer to the handlebar switch removal section of Chapter 8.
4 The speedometer cable should be removed from its housing and
lubricated with motor oil or cable lubricant.
5 Refer to Chapter 5 for the swingarm needle bearing and rear
suspension linkage lubrication procedures.
18 Valve clearances - check and adjustment
1 The engine must be completely cool for this maintenance
procedure, so let the machine sit overnight before beginning.
2 Disconnect the cable from the negative terminal of the battery.
Remove the spark plugs (see Section 16) so the crankshaft is easier to
turn.
3 Lift or remove the seat (see Chapter 7).
XV535 models
Refer to illustrations 18.7a, 18.7b, 18.8, 18.9a, 18.9b, 18.11 and 18.14
4 If you're working on an early model without an upper fuel tank,
remove the top cover (see Chapter 7).
5 If you're working on a later model with an upper fuel tank, remove
it (see Chapter 3).
6 Remove the left and right front side cover (see Chapter 3).
Remove the left side cover bracket and the left side cover
bracket/electrical component board.
7 Remove the rocker covers (see illustrations).
8 Remove the timing plug and the crankcase cover plate (see
illustration).
18.9b XV535 timing marks
1 Rear cylinder top dead center mark
2 Frornt cylinder firing range mark
3 Front cylinder top dead center mark
18.11 Measure valve clearance with a feeler gauge; hold the
locknut with a box wrench (ring spanner) and turn the adjusting
screw with an Allen wrench or screwdriver
9 Turn the crankshaft clockwise with a socket on the turning bolt
(located inside the crankcase cover plate). Watch the edge of the
alternator rotor (visible through the timing plug hole) and stop turning
when the line next to the T mark is aligned with the notch inside the
hole (see illustrations). This places the rear cylinder at top dead
center (TDC) on its compression stroke.
10 With the engine in this position, both of the valves for the rear
cylinder can be checked.
11 Start with the intake valve clearance. Insert a feeler gauge of the
thickness listed in this Chapter's Specifications between the rocker
arm and valve stem (see illustration). Pull the feeler gauge out slowly -
… 48 …


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  • Hi am Gavin from Napier, New Zealand- Does anyone know the correct clearance between the clutch basket bush and the gearbox input shaft on my 1990 Yamaha Virago xv 750 please? Submitted on 12-12-2021 at 00:03

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