Rivera Primo Gear Set - Manual

12450 Whittier Blvd., Whittier, CA 90602
562-907-2600 Voice 562-907-2606 fax
www.riveraprimoinc.com
Please read this entire installation/instruction sheet prior to assembly. We highly recommend using a
experienced v-twin mechanic to complete this installation, as improper installation could result in injury and/or
damage to the transmission that will void the warranty.
1216-0001
GEAR SET INSTALLATION INSTRUCTIONS
5 SPEED GEAR SET REMOVAL
NOTE: Leave the transmission case in the frame unless the case itself requires replacement.
1. Using the OE service manual, drain the transmission and remove all necessary parts to gain access to
both ends of the transmission as well as the top of the transmission.
2. Remove the transmission top cover, then remove the shifter cam and shifter fork assemblies.
3. Remove the bearing inner race from the transmission mainshaft using Jims tool part # 34902-84.
4. Remove the final drive pulley by removing the two screws and then the lock plate. Use Jim’s tool part #
94660-37A.
5. Remove the six socket head screws from the transmission trap door to free it from the transmission case.
Pull the side door, mainshaft and countershaft with gears from the transmission case as a single
assembly.
6. Remove and discard the door gasket.
1. Remove main drive gear using
2. Using Jim’s bearing remover tool part # 1720, remove the main drive bearing from the transmission case
and discard.
NOTE: DO NOT USE A HAMMER TO REMOVE THE SIDE DOOR
POWERDRIVE™ 6 SPEED GEAR SET INSTALLATION
1. Install a new main drive gear bearing per your OE service manual and using Jim’s main drive bearing
installation tool part # 35316-80.
2. Install a new retaining ring with the beveled edge facing outward. Install the main drive gear in the
transmission case using Jim’s 35316-80 main drive gear tool.
3. Shorten the shifter shaft sleeve .035” using a reamer & pilot. (See pictures below)