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Yamaha XV750 Virago Manual

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Chapter 1 Tune-up and routine maintenance
1-25
25.6 The fuel tap is secured to the tank by
two screws
25.7 Examine and clean the filter stack 25.8 Inspect the fuel tap diaphragm
17 Beneath the upper triple clamp are two ring nuts (see
illustration). Loosen the upper one with a spanner wrench (C-spanner)
so the lower nut is free to turn.
18 Tighten the lower ring nut a little at a time just enough to remove
any front-to-rear play in the steering head. Caution: Don't overtighten
the nut.
19 To check the adjustment, place the handlebars in their center
position, then move them all the way to right and left. With the front
wheel off the ground, the handlebar should move all the way from
center to the left or right stop with just a tap. If it takes more effort than
this. the bearings are too tight.
1984 and later XV700 through 1000 models
20 Remove the seat (see Chapter 7) and the fuel tank (see Chapter 3).
21 Remove the lower screw from the headlight assembly.
22 Loosen the upper triple clamp bolts (see Chapter 5). This allows
the necessary vertical movement of the steering stem in relation to the
fofk tubes.
23 Remove the handlebars and upper triple clamp (see Chapter 5).
24 Remove the lockwasher from the ring nuts.
25 Use a ring nut wrench (Yamaha tool no. YU-33975/part no.
90890-01430 or equivalent) to remove the upper ring nut.
26 Carefully tighten the lower ring nut to the initial torque listed in this
Chapter's Specifications, then loosen it all the way and retighten to the
final torque listed in this Chapter's Specifications.
27 Turn the steering from lock to lock and check for binding. If there
is any, remove the bearings for inspection (see Chapter 7).
28 If the steering operates properly, install the upper ring nut. Tighten
the upper ring nut with fingers so its slots align with those of the lower
ring nut (don't allow the lower ring nut to turn). If necessary, use the
ring nut wrench to keep the lower ring nut from turning while you
tighten the upper ring nut.
29 Install the lockwasher with its tabs in the ring nut slots.
30 Recheck the steering head bearings for play as described above,
if necessary, repeat the adjustment procedure. Reinstall all parts
previously removed. Tighten the steering stem nut and triple clamp
bolts to the torques listed in the Chapter 5 Specifications.
Lubrication
31 Periodic cleaning and repacking of the steering head bearings is
recommended by the manufacturer. Refer to Chapter 5 for steering
head bearing lubrication and replacement procedures.
24 Fasteners - check
1 Since vibration of the machine tends to loosen fasteners, all nuts,
bolts, screws, etc. should be periodically checked for proper tightness.
2 Pay particular attention to the following:
Sparkplugs
Engine oil drain plug
Oil filter cover bolt and drain plug
Gearshift pedal (and linkage, if equipped)
Footpegs, sidestand and centerstand (if equipped)
Engine mounting bolts
Shock absorber or rear suspension unit mounting bolts
Front axle (or axle nut) and axle pinch bolt
Rear axle nut
3 If a torque wrench is available, use it along with the torque specifi-
cations at the beginning of this, or other. Chapters.
25 Fuel system - check and filter cleaning or replacement
Warning: Gasoline is extremely flammable, so take extra precautions
when you work on any part of the fuel system. Don't smoke or allow
open flames or bare light bulbs near the work area, and don't work in a
garage where a natural gas-type appliance (such as a water heater or
clothes dryer) is present. If you spill any fuel on your skin, rinse it ofl
immediately with soap and-water. When you perform any kind of work
on the fuel system, wear safety glasses and have a class B type fire
extinguisher on hand.
1 Check the fuel tank, the tank breather hose, the fuel tap, the lines
and the carburetors for leaks and evidence of damage.
2 If carburetor gaskets are leaking, the carburetors should be
disassembled and rebuilt (see Chapter 5).
3 If the fuel tap is leaking, tightening the screws may help. If
leakage persists, the tap should be disassembled and repaired or
replaced with a new one.
4 If the fuel lines are cracked or otherwise deteriorated, replace
them with new ones.
Fuel tap filter cleaning
Refer to illustrations 25.6, 25.7 and 25.8
5 Remove the fuel tank (see Chapter 3).
6 Remove the fuel tap screws and detach it from the tank (see
illustration).
7 Clean the filter stack (see illustration). If it's torn or can't be
cleaned completely, replace it.
8 Remove the screws and inspect the fuel tap diaphragm (see
illustration). If it's torn, cracked or brittle, replace it.
9 Reverse Steps 5 through 8 to assemble and install the fuel tap.
In-line filter replacement
Refer to illustration 25.11
10 Remove the fuel tank (see Chapter 5).
… 52 …


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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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