Belt life...How many miles should they last??

[STORM-CHASER]

the service book says .5 below to 1.5 mm above the secondary, any were in there should be right

I wonder if this could be part of the problem my belt even at new never sits above the sheeve on secondary ..its like almost just about even with the top? you think if I slightly shim it ..it would be to high then????

if its just even then its in the spec range.they sell differnt size washer for shiming it. do you have a service manuel? If not privite message me. I would look at the service manuel and make sure every thing is lined up.

 

[Yama-Crazy]

Yeah I guess its 1.5 mm above would be ok also but dont know if the thinest washers yamaha sells would put me up to high in the sheeve>? Any idea?

 

[STORM-CHASER]

Yeah I guess its 1.5 mm above would be ok also but dont know if the thinest washers yamaha sells would put me up to high in the sheeve>? Any idea?

you would go thicker to to go up in the sleave, But being you are haveing problems, I would go threw the line up and belt deflection from point a to Z then you will know everthing is right ,

here is the info from the service manuel but it would not let me copy the photos.
SHEAVE OFFSET ADJUSTMENT
POWER TRAIN
SHEAVE OFFSET ADJUSTMENT
1. Lift up the shroud.
2.Remove:
• Left side cover
Refer to “PRIMARY SHEAVE AND DRIVE VBELT”
in CHAPTER 4.
3.Remove:
• Drive V-belt
4.Measure:
• Sheave offset a
Use a straightedge that is approximately
470 mm (18.5 in) long, 20 mm (0.79 in) wide,
and 4 mm (0.16 in) thick.
Out of specification → Adjust.
NOTE:
Push the secondary sheave inward towards the
frame, and then measure the sheave offset.
Sheave offset:
13.5 ~ 16.5 mm (0.53 ~ 0.65 in)
5. Adjust:
• Sheave offset
Adjustment steps:
• Apply the brake to lock the secondary sheave.
• Remove the bolt (secondary sheave) 1,
washer 2 and secondary sheave 3.
• Adjust the sheave offset by adding or removing
shim(s) 4.
Adding shim → Offset is increased.
Removing shim → Offset is decreased.
Shim size
Part number Thickness
90201-252F1 0.5 mm (0.02 in)
90201-25527 1.0 mm (0.04 in)
90201-25289 1.6 mm (0.06 in)
90201-25526 2.0 mm (0.08 in)
2-26
INSP
ADJ SHEAVE OFFSET ADJUSTMENT
• Install the secondary sheave, bolt (secondary
sheave) and washer.
• Recheck the sheave offset. If out of specification,
repeat the above steps.
NOTE:
When adjusting the sheave offset, the secondary
sheave free play (clearance) should be adjusted.
T R
.
.
Bolt (secondary sheave):
64 Nm (6.4 m · kg, 46 ft · lb)
6.Measure:
• Secondary sheave free play (clearance) a
Use a feeler gauge.
Out of specification → Adjust.
Secondary sheave free play (clearance):
1.0 ~ 2.0 mm (0.04 ~ 0.08 in)
7. Adjust:
• Secondary sheave free play (clearance)
Adjustment steps:
• Apply the brake to lock the secondary sheave.
• Remove the bolt 1 and washer 2.
• Adjust the secondary sheave free play (clearance)
by adding or reducing a shim(s) 3.
Shim size
Part number Thickness
90201-222F0 0.5 mm (0.02 in)
90201-225A4 1.0 mm (0.04 in)
2-27
INSP
ADJ DRIVE V-BELT
DRIVE V-BELT
WARNING
When installing the new V-belt, make sure that
it is positioned from 1.5 mm (0.06 in) above
the edge of the secondary sheave to –0.5 mm
(–0.02 in) below the edge a.
If the V-belt is not positioned correctly, the
clutch engagement speed will be changed. The
machine may move unexpectedly when the
engine is started.
Adjust the V-belt position by removing or adding
a spacer 1 on each adjusting bolt 2.
CAUTION:
As the V-belt wears, adjustment may be necessary.
To ensure proper clutch performance, the
V-belt position should be adjusted by adding a
spacer on each adjusting bolt when the V-belt
position reaches 1.5 mm (0.06 in) below the
edge.
New belt width:
34.5 mm (1.36 in)
Belt wear limit width:
32.5 mm (1.28 in)
1.Measure:
• V-belt position a
NOTE:
Install the new V-belt onto the secondary sheave
only. Do not force the V-belt between the sheaves;
the sliding and fixed sheaves must touch each
other.
Standard V-belt height:
–0.5 ~ 1.5 mm (–0.02 ~ 0.06 in)
2-28
INSP
ADJ DRIVE V-BELT
2. Adjust the position of the V-belt by removing or
adding a spacer 1 on each adjusting bolt 2.
3.Tighten:
• Adjusting bolt 2
V-belt position Adjustment
More than 1.5 mm
(0.06 in) above the
edge
Remove a spacer
From 1.5 mm (0.06 in)
above the edge to
–0.5 mm (–0.02 in)
below the edge
Not necessary
(It is correct.)
More than –0.5 mm
(–0.02 in) below the
edge
Add spacer
Part number Thickness
90201-061H1 0.5 mm (0.02 in)
90201-06037 1.0 mm (0.04 in)
T R
.
.
Adjusting bolt:
10 Nm (1.0 m · kg, 7.2 ft · lb)
4. Inspect:
• Drive V-belt
Cracks/damage/wear → Replace.
Oil or grease on the V-belt → Check the primary
and secondary sheaves.
5. Inspect:
• Primary sheave
• Secondary sheave
Oil or grease on the primary and secondary
sheaves → Use a rag soaked in lacquer thinner
or solvent to remove the oil or grease.
Check the primary and secondary sheaves.
2-29
INSP
ADJ DRIVE V-BELT/ENGAGEMENT SPEED CHECK
6.Measure:
• Drive V-belt circumference a
Out of specification → Replace.
V-belt circumference:
1,129 ~ 1,137 mm (44.4 ~ 44.8 in)
ENGAGEMENT SPEED CHECK
1. Place the machine on a level surface of hardpacked
snow.
2. Inspect:
• Clutch engagement speed
Inspection steps:
• Start the engine, and open the throttle lever
gradually.
• Check the engine speed when the machine
starts moving forward.
Out of specification → Adjust the primary
sheave.
Engagement speed:
RS90/RS90R:
3,300 ~ 3,700 r/min
RSG90:
3,400 ~ 3,800 r/min
RS90M:
3,800 ~ 4,200 r/min
RST90 “For USA/Canada”:
3,000 ~ 3,400 r/min
RST90 “For Europe”/RST90TF:
2,800 ~ 3,200 r/min

 

[maddogjeff]

2000 miles is about my limit. This even goes back to my Viper, so since '02, over 12,000 miles, 2000/belt is about my average. I'm a full throttle, full speed type of rider.

Hondo, how do you do it?

 

[RSVECTORFREAK]

Just squeaked 900 miles out of a new yamaha belt. Top blew off for foot. Always happens at sustained high rate of speed. Alignment looked good so I'm scratching my head.