Rivera Primo Brute III Extreme User Manual

B RUTE III EXTREME

ENCLOSED BELT D R I V E

INSTA L L ATION INSTRUCTIONS

11mm 1-3/4” Wide

TM

Fits 1990-2006 Softail

®

Models

&

1990-2005 DynaGlide

®

Models

t is common knowledge that a belt drive primary provides advantages & service that a standard chain drive

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primary cannot. For dependable, high-performance, long lasting service nothing beats a modern Primo®pri­mary Belt Drive! A long standing tradition of ”Quality & Performance” has made Primo®Belt Drive systems
the most popular in the world! That same quality & performance is now available in the Brute III EXTREME
belt drive for Evolution Big-Twin and Twin Cam motorcycles (fully enclosed primary drive). The wet clutch night­mare is over, no more leaky primary, no more draining the primary for inspection or maintenance. Carefully
read & follow these instructions for a quick, convenient installation. If you have questions call [phone].

IMPORTANT SAFETY NOTICE....

When p er forming a ny motorcyc le work s uc h as inst alling a be lt drive, s ecure t he motorcyc le in an up right pos it ion
with co nvenient access to the primary dr ive. I f you a re working with t he motor cy cle on a lift make s ur e it is securel y
fasten ed to preve nt it from falling.

Remove t he batter y prior to starting th is instal lation.

TM

Strip the primary

Drain the primary case, remove both the inner & outer pri­mary covers, & all OEM chain drive components from the
primary chaincase. Thoroughly clean the inner & outer pri­mary covers to re­move all traces

of primary fluid. Pic­tured is a 1995 Harley­Davidson®Dyna-Glide
primary. Remove the

factory bearing race
from the transmission
mainshaft using the
Jims tool part #
34902-84.

1

Install Primo’s one-piece, sealed bearing included in the kit.

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Install the sealed bearing (PP-216)

2

2108-0020

Install Allen head bolt

NOTE: Replace the OEM hex-head bolt (Dyna Glide only) with the
button-head Allen bolt provided in the kit. TORQUE THE BUTTON­HEAD BOLT TO 29 FOOT POUNDS.

3

Check pulley alignment with a straight-edge

Install front pulley (together with
front inside guide plate) & rear
pulleys without the belt & check
alignment as shown(straight
edge flush with rear of ring-gear
lines-up with outer edge of front
pulley) remove pulleys and pro­ceed with installation. If align­ment isn’t satisfactory see photo

8. The provided .100” washer can
be used to space the front pulley
outward as needed.

4

Check for proper belt clearance

5

After ensuring proper pul-

ley alignment, again check
the areas indicated in the
photo for belt and/or pul­ley clearance. Always
check rear-pulley and belt
clearance here before op­erating the motorcycle.

Apply grease to the main-shaft splines

Apply a thin coat of the special
Primo grease supplied in the kit
to the splines of the transmis­sion main-shaft to act as both a
corrosion inhibitor, & lubricant.
The grease also acts as a cush­ion for the splines on the trans­mission main-shaft during
operation.

5B

Shims are manufactured from high quality steel, precision
ground for parallel & flat surfaces to ensure perfect pulley
alignment. Correct pulley alignment & correct belt tracking
are a must for long belt life. These shims make pulley align­ment easy. Shims are available in .020", .030", .050", .075" &
.100” thick dimensions, or sets of "one-of-each.”

Optional pulley shims,

PART # PX-1

Includes one of each

.020”, .030”, .040”,

.050” and .100”

Check primary belt clearance here

5A

Th is inne r p rima ry (Ear ly
Evo) has had a tab removed
to allow b elt clear ance in
the ar ea indicated. Most in­stal lations requi re some
grin ding on the i nner and
oute r primarys.

Install rear pulley & belt.

Install the rear pulley (clutch bas­ket) & belt. Apply Rivera blue
thread lock to the main-shaft
threads as shown. INSTALL THE
CLUTCH HUB NUT & TIGHTEN
TO 70-80 FOOT POUNDS OF
TORQUE. (The center adjustment
screw with o-ring will prevent
transmission oil from leaking thru
the main-shaft into the clutch
pack).

6

Install washer as needed.

A .100” washer may be
needed behind the front pul­ley on some Dyna-Glide &
Softail applications.

7

Install front pulley, washer & inner/outer
guides. Use 1-2 drops of blue thread-lock
on the threads of the motor shaft. IN­STALL & TIGHTEN NUT TO FACTORY
SPECS (150-165 FOOT POUNDS) using a
quality torque wrench.

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Use thread-lock here.

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