Shimano SL-BS79 Technical Service Instructions

When installing the components to carbon frame/handle
bar surfaces, verify with the manufacturer of the carbon
frame/parts for their recommendation on tightening torque
in order to prevent over tightening that can cause damage
to the carbon material and/or under tightening that can
cause lack of fixing strength for the components.

General Safety Information

– To avoid serious injuries:

• Obtain and read the service instructions carefully
prior to installing the parts. Loose, worn or damaged
parts may cause the bicycle to fall over and serious
injury may occur as a result. We strongly recommend
only using genuine Shimano replacement parts.

• Read these Technical Service Instructions carefully,
and keep them in a safe place for later reference.

Note

• For smooth operation, use the specified outer casing
and bottom bracket cable guide.

• Because the high cable resistance of a frame with
internal cable routing would impair the SIS function,
this type of frame should not be used.

• The sliding surfaces of the inner cable and outer
casing should be greased before use.

• The shifting lever can be installed to handlebars with
diameters of 19.0 – 22.0 mm.

• Operation of the levers related to gear shifting should
be made only when the front chainwheel is turning.

• Parts are not guaranteed against natural wear or
deterioration resulting from normal use.

• For any questions regarding methods of handling or
maintenance, please contact the place of purchase.

WARNING

One Holland, Irvine, California 92618, U.S.A. Phone: [phone]

Industrieweg 24, 8071 CT Nunspeet, The Netherlands Phone: [phone]

3-77 Oimatsu-cho, Sakai-ku, Sakai-shi, Osaka 590-8577, Japan

Lever boss

5 mm Allen key

Tightening torque:

5 - 6 N·m {43 - 52 in. lbs.}

Tightening torque:

2.5 - 3 N·m {21 - 26 in. lbs.}

Tightening torque:

1.5 - 2 N·m {13 - 17 in. lbs.}

Please note: specifications are subject to change for improvement without notice. (English)
© May 2008 by Shimano Inc. XBC SZK Printed in Japan.

Technical
Service Instructions SI-6RP0A-001

SL-BS79

Bar End

Shifting Lever

Series

Shifting lever

Rear derailleur

Front derailleur

Outer casing

Inner cable

Bottom bracket guide

Sprockets

DURA-ACE

SL-BS79

RD-7900

FD-7900

SP41 sealed outer casing

1.2 mm dia. (stainless steel)

SM-SP17

10

In order to realize the best performance, we
recommend that the following combination be used.

1. Attach the body unit to the handlebar, and then use a 5

mm Allen key to turn the body fixing bolt
counterclockwise to tighten it.

2. Install the lever boss to the body unit.

3. Install the lever to the body unit.

4. Install the outer casing stopper to the brazed-on boss.

6. Wrap the handlebar with bar tape.

5. With the outer casing placed along the handlebar, cover the outer casing with

the outer casing guide, and then use tape or similar material to provisionally
attach it to the handlebar.

The illustration shows an explanation of the case where
the shifting lever is installed to drop handlebars.
Install the front lever in the same way.

Lever grip

Stopper fixing bolt

Outer casing stopper (SM-CS50)

3 mm Allen key

Outer casing guide

Tape

Body fixing bolt

Body unit

Set so that the
projection faces
downward.
Right: Thickness
(large)
Left: Thickness
(small)

Brazed-on boss (M5)

Installation of the lever