KURYAKYN 3990 Ergo III Adjustable Cruise Mounts Installation Guide
- June 13, 2024
- KURYAKYN
Table of Contents
KURYAKYN 3990 Ergo III Adjustable Cruise Mounts
Product Information
The Black Ergo III Adjustable Cruise Mounts with Trident Dually Pegs 3990 is a product designed by Kuryakyn. It is designed to provide comfort and convenience to motorcycle riders during long rides. The adjustable cruise mounts allow riders to find the perfect position for their feet, reducing fatigue and improving overall riding experience. The Trident Dually Pegs offer a larger surface area for the feet, providing better stability and control.
Kit Contents
- 1 Black Right-Side Trident Dually Peg with Adjustable Male Mount
- 1 Black Left-Side Trident Dually Peg with Adjustable Male Mount
- 1 Black Right-Side Mount/Arm Assembly
- 1 Black Left-Side Mount/Arm Assembly
- 2 Black Extension Arms
- 1 Black Left-Side Footpeg Clevis
- 1 Black Right-Side Footpeg Clevis
- 1 Hardware Kit Containing
- 4 3/8-16 X 5/8 Set Screws
- 2 Adjustable Stops
- 4 1/4-20 X 1-1/8 Button Socket Cap Screws
- 4 1/4-20 Nylock Nuts
- 4 1/4-20 X 5/16 Button Socket Cap Screws
- 2 3/8-16 X 1 Socket Head Cap Screws
- 2 5/16-18 X 1 Socket Head Cap Screws
- 2 Thick Wave Washers
- 2 Thin Wave Washers
- 2 Fixed Position Stoppers
- 1 Installation Instructions
Tools Recommended for Installation
- Set of Hex Wrenches
- Hex Socket Set with Ratchet
- FT/LBS Torque Wrench
- Set of Combination Wrenches
- Loctite Threadlocker Blue 248
Customer Service
If you have any installation questions or need assistance, you can contact
Kuryakyn’s customer service at
- Toll-Free : 877.370.3604
- Email : techsupport@kuryakyn.com
- Phone : 715.247.2983
Limited Warranty
The product is covered by a limited warranty against defects in materials
and workmanship for one (1) year from the date of purchase by the consumer.
The warranty excludes certain provisions, and proof of purchase is required.
Please refer to the warranty information provided in the original packaging
for more details.
Product Usage Instructions
- Ensure that the engine and exhaust system of the motorcycle have fully cooled down to prevent injury.
- Check that all the parts listed in the kit contents are included.
- Refer to the installation instructions provided in the kit for step-by-step guidance on installing the Black Ergo III Adjustable Cruise Mounts with Trident Dually Pegs.
- Use the recommended tools for installation, including hex wrenches, hex socket set with ratchet, FT/LBS torque wrench, combination wrenches, and Loctite Threadlocker Blue 248.
- Follow the instructions carefully, ensuring that all components are properly installed, maintained, and operated under normal conditions.
- If you encounter any issues during installation or have any questions, contact Kuryakyn’s customer service for assistance.
Note: The installation instructions provided in the kit may contain additional details and specific steps for your motorcycle model. Follow them closely to ensure a safe and successful installation.
BLACK ERGO III ADJUSTABLE CRUISE MNTS w/ TRIDENT DUALLY PEGS 3990
THANK YOU FOR CHOOSING KϋRYAKYN!
PROTECT YOURSELF AND OTHERS FROM POSSIBLE INJURY AND/OR PROPERTY DAMAGE OR
LOSS. PAY CLOSE ATTENTION TO ALL INSTRUCTIONS, WARNINGS, CAUTIONS, AND NOTICES
REGARDING THE INSTALLATION, USE, AND CARE OF THIS PRODUCT.
WARNING
THIS INDICATION ALERTS YOU TO THE FACT THAT IGNORING THE CONTENTS DESCRIBED
HEREIN CAN RESULT IN POTENTIAL DEATH OR SERIOUS INJURY.
CAUTION
This indication alerts you to the fact that ignoring the contents described
herein can result in minor or moderate potential injury.
NOTICE
This indication alerts you to the fact that ignoring the contents described
herein may negatively affect product performance and functionality or damage
the product itself or the product to which it is being attached.
MAKE SURE THE FOLLOWING PARTS HAVE BEEN INCLUDED IN THE KIT
- 1 Black Right-Side Trident Dually Peg with Adjustable Male Mount
- 1 Black Left-Side Trident Dually Peg with Adjustable Male Mount
- 1 Black Right-Side Mount/Arm Assembly
- 1 Black Left-Side Mount/Arm Assembly
- 2 Black Extension Arms
- 1 Black Left-Side Footpeg Clevis
- 1 Black Right-Side Footpeg Clevis
- 1 Hardware Kit Containing
- 4 3/8”-16 X 5/8” Set Screws
- 2 Adjustable Stops
- 4 1/4”-20 X 1-1/8” Button Socket Cap Screws
- 4 1/4”-20 Nylock Nuts
- 4 1/4”-20 X 5/16” Button Socket Cap Screws
- 2 3/8”-16 X 1” Socket Head Cap Screws
- 2 5/16”-18 X 1 Socket Head Cap Screws
- 2 Thick Wave Washers
- 2 Thin Wave Washers
- 2 Fixed Position Stoppers
- 1 Installation Instructions
TOOLS SUGGESTED
Set of Hex Wrenches, Hex Socket Set with Ratchet, FT/LBS Torque Wrench, Set of
Combination Wrenches, Loctite Threadlocker Blue 248
NOTICE
This copy of installation instructions contains important infor-mation. Ensure
that the end user receives this copy and is aware of its importance for future
reference.
The following pictures show chrome parts. The installation of black parts is
the same.
CUSTOMER SERVICE
877.370.3604 (toll free)
INSTALLATION QUESTIONS
techsupport@kuryakyn.com or call
715.247.2983
LIMITED WARRANTY
- Küryakyn warrants that any Küryakyn products sold hereunder, shall be free of defects in materials and workmanship for a period of one (1) year from the date of purchase by the consumer excepting the following provisions:
- Küryakyn shall have no obligation in the event the customer is unable to provide a receipt showing the date the customer purchased the product(s).
- The product must be properly installed, maintained and operated under normal conditions.
- Küryakyn makes no warranty, expressed or implied, with respect to any gold plated products.
- Küryakyn shall not be liable for any consequential and incidental damages, including labor and paint, resulting from failure of a Küryakyn product, failure to deliver, delay in delivery, delivery in nonconforming condition, or for any breech of contract or duty between Küryakyn and a customer.
- Küryakyn products are often intended for use inC specific applications. Küryakyn makes no warranty if a Küryakyn product is used in applications other than intended.
- Küryakyn electrical products are warranted for one (1) year from the date of purchase by the consumer. L.E.D.’S contained in components of Küryakyn products will be warranted for defects in materials and workmanship for 3 years from the date of purchase where as all other components shall be warranted for one(1) year.
- This includes, but is not limited to; control modules, wiring, chrome & other components.
- Küryakyn makes no warranty of any kind in regard to other manufacturer¹s products distributed by Küryakyn. Küryakyn will pass on all warranties made by the manufacturer and where possible, will expedite the claim on behalf of the customer, but ultimately, responsibility for disposition of the warranty claim lies with the manufacturer.
ABOUT OUR CATALOG
- For purchasing Küryakyn® products, you can receive a complete catalog free of charge. Send the Proof-of-Purchase below with your address to: Küryakyn, P.O. Box 339, Somerset, WI 54025.
- Please indicate either Accessories Catalog for Harley-Davidson® or GL & Metric Cruisers.
- Be sure to ask your local dealer about other Küryakyn® products, the motorcycle parts and accessories designed for riders by riders.
©2005 Küryakyn USA® All Rights reserved.
WARNING
YOU WILL BE WORKING AROUND THE ENGINE AND EXHAUST SYS-TEM DURING INSTALLATION.
ENSURE THAT THE ENGINE AND EX-HAUST SYSTEM HAVE FULLY COOLED TO PREVENT
INJURY.
NOTE
In the following instructions, left and right may be referred to as “clutch-
side” (left) and “brake-side” (right) for clarity.
STEP 1
Read and understand all steps in the instructions before starting the
installation. Park the motorcycle on a hard, level surface and turn off the
ignition. Put the motorcycle on its center stand or secure it in a wheel
chock. Allow the engine and exhaust system cool.
ERGO III ADJUSTABLE CRUISE MOUNT INSTALLATION
- STEP 2
Locate the clutch-side (left) Ergo III Adjustable Cruise Mount. Refer to PIC
- There will be an “L” on the backside of the Adjustable Arm as shown in PIC
- The Mounts are side specific, so ensure that you have the correct Mount
before moving on.
-
STEP 3 Remove the four screws on the underside of the clutch-side Mount. PIC 3. Set the screws within arms reach of the work area on the clutch-side of the motorcycle.
-
STEP 4 Loosely install two of the included Set Screws in the bottom clamp-half as shown in PIC 4.
-
STEP 5 Turn the clamp-half over and position the Adjustable Stop in the bottom clamp-half. PIC 5.
-
STEP 6 Position the bottom clamp-half under the clutch-side engine guard as shown in PIC 6 and 7 on PAGE 3.
-
STEP 7 Refer PIto C 8. Position the clutch-side upper clamp-half (separated in STEP 3) over the engine guard and align it with the bottom clamp-half. Secure the bottom to the top with the four screws removed in STEP 3. PIC 8
NOTE: Do not fully tighten the screws at this time. Leave them snug to allow for adjustment of the mounts. -
STEP 8 Repeat STEPS 2 through 7 for the brake-side (right).
EXTENSION ARM AND CLEVIS INSTALLATION
- STEP 9 Locate one of the Extension Arms in the Hardware Kit. The Arms are NOT side specific.
- STEP 10 Refer to PIC 9 below. The Extension Arms allow for three possible positions. A shows a possible Extension Arm position for riders with shorter legs. B shows the position for riders with medium length legs. C shows the position for riders with longer legs. Determine which Extension Arm posi-tion will suit you best.
- STEP 11 On the clutch-side of the bike, attach the Extension Arm to the Rotating Arm with two of the in-cluded 1/4”-20 X 1-1/8” Button Socket Head Screws. Thread the screws through the Extension Arm and secure them on the back side with two of the included Nylock Nuts. Fill any exposed threaded holes with the included 1/4”-20 X 5/16” Button Socket Head Screws. PIC 9 A
WARNING
FAILURE TO ADJUST FOOTPEGS SO THEY FOLD UPWARD AND REARWARD IF CONTACTED BY
ANY OBJECT COULD RESULT IN LOSS OF CONTROL THAT COULD RESULT IN SERIOUS INJURY
OR DEATH.
- STEP 12 Determine the left footpeg clevis from the right. PIC 10 When installed, the left clevis will have its footpeg stop on the top side and the screw hole will face the rear of the bike. PIC 10
- NOTE: Place a drop of Loctite Threadlocker Blue 248 on the threads of the clevis and footpeg screws before installing. Follow the manufacturer’s recommenda-tions for proper application.
- STEP 13 Apply some Blue Loctite (248) to one of the 3/8”-16 X 1” Socket Head Cap Screws. Install the clutch-side footpeg clevis on the Extension Arm. Secure it with one of the 3/8” Screws. Leave the screw loose until the clevis has been adjusted.
- STEP 14 Push down on the Rotating Arm until it reaches its stop; adjust the angle of the clevis so the foot-peg will fold up and back at an angle. Ensure the splines on the clevis and arm engage and tighten the screw. Torque the screw to 20 FT/LBS.
FOOTPEG INSTALLATION
- STEP 15 Apply some Blue Loctite (248) to the 5/16”-18 X 1” clevis screw threads. Install the clutch-side footpeg in the clevis and secure it with the 5/16” clevis screw. PIC 11 If necessary, use the in-cluded Wave Washers to take up any excess space between the footpeg adapter and the clevis. Torque the screw to 25 FT/LBS.
- STEP 16 Loosen the footpeg screw in the end of the footpeg to adjust the footpeg angle. Tighten the foot-peg screw.
- STEP 17 Repeat STEPS 9 through 16 for the other side.
FINAL ADJUSTMENT
- NOTE: Additional adjustment of the Ergo III Adjustable Cruise Mounts can be made for Mount angle and leg room. If additional adjustment is needed follow the STEPS below.
- STEP 18 Additional Mount angle adjustment: Loosen the four screws from STEP 7. Turn the two Set Screws on the bottom clamp-half clockwise to increase the mount angle. Turn the screws counterclockwise to lower the angle. Adjust the Set Screws evenly, then tighten the four clamp-half screws.
- STEP 19 Additional leg room adjustment: Loosen the four screws from STEP 7. Carefully slide the mount along the engine guard until you get the desired position. Tighten the four screws.
WARNING
THE ROTATING ARM CAN BE POSITIONED IN A WAY THAT GREATLY DECREASES CORNERING
CLEARANCE WHICH MAY CAUSE LOSS OF CONTROL RESULTING IN SERI- OUS INJURY OR
DEATH. ENSURE THAT THE ROTATING ARM IS POSITIONED PARALLEL TO OR ABOVE THE EN-
GINE GUARD WHEN IN THE UNLOADED POSITION. RE-MOVE YOUR FEET FROM THE FOOTPEG
WHEN COR-NERING TO AVOID LOSS OF CONTROL.
OPTIONAL HORIZONTAL FIXED-ARM INSTALLATION
- STEP 20 On the clutch-side of the bike. Remove the 1/2” Screw, Small Flat Washer, and Large Flat Washer that secures the Rotating Arm to the Mount. FIG 1 on PAGE 6 Set them aside, they will be re-used. Remove the Rotating Arm, Helix and End Cap from the mount. The inside of the Arm and Helix are marked with an “L”. Refer to PIC 12 and 14.
- STEP 21 Remove the Spring, Steel Bushing, and Brass Bushing. Set these aside, they will NOT be reused. FIG 2 on PAGE 6
- STEP 22 Position the Helix in the Rotating Arm EXACTLY as shown in PIC 12. PIC 13 shows the right side.
- STEP 23 Hold the Helix in place in the Rotating Arm and position the End Cap over the nose of the He-lix. PIC 14 Turn the End Cap until it settles into place on the nose of the Helix as shown in PIC 15.
- STEP 24 Holding everything in
- STEP 25 Test fit the assembly on the Ergo III mount. With the Helix engaged on the cogs of the Ergo III mount, pull up on the arm to ensure that the Arm assembly is parallel with the engine guard and valve cover.
- STEP 26 Remove the End Cap and install an included Fixed Position Stopper in place of the Spring and Steel and Brass Bushings. Reinstall the Rotating Arm and Helix (still aligned exactly as shown in PIC 12 or 13).
- STEP 27 Insert the 1/2” Screw, Small Flat Washer, and Large Flat Washer (removed in STEP 20) through the Rotating Arm assembly. Thread it into the Mount. Torque the 1/2” Screw to 30 FT/LBS.
- STEP 28 Repeat STEPS 20 through 27 for the other side.
- STEP 29 If necessary, make any other adjustments by referring to STEPS 10 through 19.
ERGO III ADJUSTABLE CRUISE MOUNT CARE
Do not wash with a pressure washer. The water pressure may remove the grease.
Periodic greasing may be necessary to maintain proper function.
NOTICE
It is the end user’s responsibility to ensure that all of the fasteners
(including pre-assembled) are tightened before operation of the motorcycle.
Küryakyn will not provide warranty coverage on products or compo-nents lost
due to improper installation or lack of maintenance. Periodic inspection and
maintenance are required on all fasteners.
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