Belt Drives CS-25A User Manual

Belt Drives Ltd. CS-24A-1 & CS-25A-1 INSTALLATION INSTRUCTIONS

Refer to OEM service manual for primary cover, and compensator removal and installation

“test fit first and achieve proper primary chain alignment before final assembly”

3. Remove existing sprocket or compensator &
spacer. Refer to Harley manual for removal
instructions for your year and model bike..

2. Drain primary fluid, and remove
outer primary cover and gasket.

4. Evenly apply a small amount of Anti-Sieze
to all of the threads of the compensator
sprocket carrier body.

5. Evenly apply a small amount of
Anti-Sieze to all of the threads of the

compensator sprocket.

6. Lightly grease and install (1) of the Nylatron
washers into one of the recessed pockets of
the compensator sprocket. “Either side is OK”

7. Thread carrier body into sprocket, make
sure nylatron washer seats fully into the
recessed pocket.

8. Flip the carrier body and sprocket, so the
face of the carrier body is in the palm of
your hand, lightly grease the 2nd nylatron
washer and place it in the recessed pocket
of sprocket assembly.

1. Support and secure motorcycle,
then disconnect the battery as per
your service manual.

9. Install the rear steel spacer, “steel spacer
goes on top off nylatron washer”. When
assembled steel spacer should sit just below
the height of carrier body.

NW-100 nylatron washer
QTY.(2) same size

CSN-1 Compensator

Flange Nut

CS-25-A-1 Complete 25 tooth Compensator sprocket assembly
CS-24-A-1 Complete 24 tooth Compensator sprocket assembly

CSCB-1 Compensator
sprocket carrier body

10. Apply RED loctite to threads of the output shaft.
Install primary chain onto compensator sprocket. Place compensator assembly
and chain onto the output shaft, make sure that the nylatron washers and rear
steel spacer stay in place. torque flange nut to factory spec. for your year and
model application. *Critical Note, if spacing is needed behind compensator for
correct primary chain alignment, The O.D. (outside diameter) of spacer MUST be

2.220 or larger with an I.D. (inside diameter) of 1.130. The included alignment
spacer meets these measurements.

On Softail models 1986-1999 the removal of the the stock .200” compensator spacer and use
of the .125” spacer supplied in kit, may be needed to achieve correct primary chain alignment.
Also BDL has additional shim kits available Part# SK-1 for 1970-2006.

CS-SS1- Steel Spacer

PATENT # US 6,234,909 B1

Included alignment
spacer,“use as needed”