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Bennett’s Performance Dyna Build, Part Two

With the Upgraded S&S 106-Inch in Place, Time to Spruce the Primary Bearings, Clutch, Carb and Air Cleaner

By Bandit and Ron Benfield
10/23/2013


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It took a while before the call shook the receiver on the wall.
 
“We’re ready, finally to move onto the next stage,” Eric said, and I slipped across congested Long Beach on Pacific Coast Highway to the base of Signal Hill, where the clean offices of Bennett’s Performance and Branch O’Keefe reside in an alley.
 
There’s a bit of a dichotomy here. When you say Pacific Coast Highway, you immediately have visions of the sea splashing against white sand. That’s not the case when PCH skirts through the Los Angeles Harbor area behind container ships, container trucks, and container trains Terminal Island and through the concrete jungle of Long Beach packed with steel supply joints, body shops, junk yards, stucco Mexican fast food joints, and dingy bars. Sure, once you weave south of Long Beach, the coast comes into view again and islands, marinas, and white sand can one again be seen.

Sorta the same equation in reverse fits Bennett’s. They are located on an alley, but it’s about as clean and wide as a comfortable two-lanner, and the buildings are pristine and orderly. Hell, there’s even some landscaping bordering the buildings. Eric and his dad keep the shop tidy and it’s open and painted white on the interior and the exterior. Makes it easy to take tech shots.



So we got to work. Eric hadn’t ridden his own motorcycle in six months, broke up with his girlfriend three times, and needed his two-wheeled Valium. Working with D&D, they altered a stock D&D system to fit ’91 to ’13 Dynas. The heat shield was modified and the system was ceramic-coated for a long-lasting satin black. He also had to modify the mounting bracket for the performance pipe system. Eric is going to share his mods with the D&D gang so they can make adjustments to their manufacturing process for these model years.










Eric’s first move was to avoid a potential problem with the 5-speed tranny main shaft inner primary race. They occasionally drift inwards from the inner primary toward the tranny main shaft seal and damage the threads. A malady solution included installing a JIMS inner primary bearing upgrade Kit.

Using the CCE tool to press out the stock inner-primary bearing.
Using the CCE tool to press out the stock inner-primary bearing.



Here are the JIMS pieces, with their sealed bearing next to the stock roller bearing. All that's missing is the original main shaft race.
Here are the JIMS pieces, with their sealed bearing next to the stock roller bearing. All that's missing is the original main shaft race.






Here’s what the JIMS team has to say about it: Thinking of running an open primary system, or looking for added durability in your high output engine? JIMS now has a double-row ball-bearing with seal and retaining ring kit.

For use on 1990 to 2006 FLH and FXST, and on 1990 to 2005 Dyna models or any 5 or 6-speeds using H-D bearing No. 9135.

Note: Not compatible with Bandit clutch kits.

This area will be damaged if a stock race comes loose from the inner primary.
This area will be damaged if a stock race comes loose from the inner primary.



Eric used his Custom Cycle Engineering swing arm punch to remove the stock bearing. Then he used JIMS tools, including the race puller No. 34902-84 and the seal installer No. 967, to press in the bearing to the perfect depth. The JIMS kit removes the main-shaft bearing race.













With the bearing pressed in perfectly, Eric installed the snap ring with the flat side toward the transmission, then the JIMS seal. It was time to install the inner primary using 22 foot-pounds of torque on the 5/16 bolts with a dab of blue Loctite.





We didn't mention this in the article, but don't forget to install the starter jack shaft with the locking tab. Make sure to follow the manual and install all the springs and washers.
We didn't mention this in the article, but don't forget to install the starter jack shaft with the locking tab. Make sure to follow the manual and install all the springs and washers.




He was ready to install the new Rivera Pro Cutch, but first he had to press out the stock clutch hub. The performance differences in the clutches were obvious. The difference in the fiber surface areas was substantial. For big-inch motorcycles, the more surface contact area, the better.

The stock clutch.
The stock clutch.



Pressing the stock basket out of the hub.
Pressing the stock basket out of the hub.



Check the difference in clutch plate surfaces--Amazing!
Check the difference in clutch plate surfaces--Amazing!



Per the Rivera/Primo instructions, we needed to soak the Rivera clutch plates in ATF transmission fluid before assembly. “If we don’t, Ben Kudon, from Rivera will bust my balls,” Eric said trembling. Per the instructions, we soaked them for 10-15 minutes.



Pressing the famous Primo/Rivera basked into place.
Pressing the famous Primo/Rivera basked into place.








While waiting, we installed the stock compensating sprocket using a 2.5-inch socket and Loctite, and the primary chain adjuster. Eric installed the clutch hub with a 1 3/16 socket, being careful to handle the left-handed threads. Then he installed the first thick steel plate into the hub, followed by a fiber, then steel, and then another fiber plate.



Eric runs ATF fluid in his primary. With the pressure plate in place, the diaphragm and the retainer, the clutch was a done deal. “Don’t over-tighten the fasteners against the locking ears,” Eric pointed out.



Eric uses JIMS guide pins to hold gaskets in place, so the primary could be slid into place without fighting the gasket. They are easy to make, or just buy a set the perfect length from JIMS. He tightened the stock primary to 120-inch-pounds of torque.





Between the last time I darkened the Bennett’s Performance door and this point, Eric and John O’Keefe from Bennett’s Performance had a brain fart to machine only Twin Cam cylinders to give them a drag bike appearance. Eric volunteered to be first and tore his engine apart again.

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Reader Comments


I don't care what anybody out there says: Follow all instructions.

The most important part number for ANY bike is the shop manual. Rivera Primo clutch basket assembly. Whatever Rivera Primo states. That is what you do. No exceptions.

Nick Taylor
Bakersfield, CA
Friday, March 27, 2015
Editor Response Yes sir!
--Bandit

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