7.9
PVT System
7
Drive Belts
*Belt dimensions are given in nominal dimensions. There is a +/
- variance for all critical dimensions. Clutch set up must be
inspected when a new belt is installed and, if necessary adjusted.
The drive belt is an important component of the converter
system. In order to achieve maximum efficiency from the
converter, drive belt tension (deflection), clutch offset, and
alignment must be adjusted properly.
Belt Inspection
1. Measure the belt width and replace it if it is worn severely.
Generally a belt should be replaced if the clutches can no
longer be adjusted to provide the proper belt deflection.
• Project the side profiles and measure from corner to
corner.
• Place a straight edge on each side of the drive belt and
measure the distance where the straight edges intersect
at the top (A,B).
2. Inspect the belt for loose cords. missing cogs, cracks,
abrasions, thin spots or excessive wear spots. Replace if
necessary.
3. Inspect the belt for hour glassing (extreme circular wear in
at least one spot an on both sides of the belt). Hour glassing
occurs when the drive train does not move and the drive
clutch engages the belt. Example would be taking off while
the track is frozen to the ground. Remember to always
warm up the track and free it from the ground.
Drive Clutch Bolt Torque
Follow the torque table below when installing the drive clutch.
Part
Number
Belt Width
(Projected)*
in/mm
Side
Angle
Overall*
Center to
Center
in/cm*
Outer
Circumference
in/cm
Notes
3211080 1.438 / 36.5 28_ 11.5 / 29.2 46.625/118.4 Double Cog CVT version of 3211078
3211078 1.438 / 36.5 28_ 11.5 / 29.2 46.62 / 118.4 Standard Drive Belt
3211117 1.46 / 37.1 26_ 11 / 27.9 45.79 / 116 MBL High Performance Belt “Sanded Finish”
3211121 1.46 / 37.1 26_ 11 / 27.9 45.79 / 116 MBL Kevlar Belt “Cut Finish”
3211122 1.46 / 37.1 26_ 11.5 / 29.2 46.77 / 118.8 MBL Kevlar Belt “Cut Finish”
3211114 1.438 / 36.5 26_ 10.625 / 27 45.2 / 114
MBL High Performance Race Belt
“Sanded Finish”
3211115 1.46 / 37.1 26_ 11.5 / 29.2 46.77 / 118.8 MBL High Performance Belt “Sanded Finish”
BELT
A
B
= T
All 600 HO Carbureted Engines = 50 Ft.Lbs. (68 Nm)
All 600 / 700 / 800 CFI Engines = 80 Ft.Lbs. (108 Nm)
Re-torque clutch bolt after running engine.
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