Tech Guide

Tech Guide

Read our carefully prepared and easy-to-understand instruction manuals or watch how it gets done in our video tutorials.

Installation Guide List

Installation Guide Videos

Frequently Asked Questions

General
  1. I lost my installation instructions. Where can I get a copy?
    You can download PDFs of our installation instructions here: Kodlin Tech Guide – Installation Instructions.
    Videos and other technical resources are also available in the Tech Guide section.
  2. What if a product is out of stock on your website?
    Check with your local Harley-Davidson dealership or a Drag Specialties dealer. Our products are also available through J&P Cycles, Dennis Kirk, and other online retailers.
  3. What documentation is required for warranty coverage?
    • Copy of the original invoice (no screenshots)
    • Clear photos or a short video showing the failure
    • Your contact details and shipping address
    • Return of the product may be required at our discretion
  4. Can I pick up an order directly at your store?
    Yes, you can. Please call ahead to confirm the item is in stock and that someone will be available to assist you.
  5. Do you have the color code for the bronze powder coat?
    No. Harley-Davidson does not release its proprietary color codes. Our manufacturer matched the bronze finish as closely as possible, but no official code exists.
Brake Rotors
  1. Will the black rotors wear to silver on the outer surface?
    No. According to our manufacturer SBS, they are treated with a durable thermochemical nitride coating that prevents fading. Over time, normal wear will be similar to a standard polished rotor.
Covers / Accessories
  1. Can I order a SKU in raw billet?
    The only raw material offered is stainless steel on our NXL line. All other products are chromed, anodized, or powder coated.
Handlebars and Hand Controls
  1. Will Fastback and Ascent risers fit older models?
    Yes, provided the handlebar center clamping diameter and 3.5” riser spacing match. Installers must ensure proper fitment and clearance with other accessories.
  2. How tall are your risers?
    • Breakout risers: ~1.25” from tree mount surface to handlebar (not for older Twin Cam Breakouts)
    • Fastback risers: 6”, 8”, and 10” with 1” bar clamping, no pullback
    • Ascent risers: 8” and 10” with 1.5” pullback
  3. Can I buy a separate top clamp for Fastback risers if I change my speedo?
    No. Top clamps are not sold separately at this time.
Foot Controls
  1. Where can the mini boards be installed?
    • Passenger position, and in some models, rider position (replacing a peg, not a floorboard)
    • Highway peg location, if clearance allows
Lighting and License Plates
  1. Can LED turn signals be used on other models or brands?
    Yes. Customizing is possible, but installers must understand the bike’s circuitry. All products are for 12-volt systems only.
  2. My dash flasher blinks faster after installing LEDs. Is this normal?
    Yes. The BCM detects a reduced load and assumes a bulb is out. Run emergency flashers for 3–5 minutes, cycle ignition, and retest. If it doesn’t normalize, a load balancer may be needed.
  3. One LED doesn’t work after installation. What should I do?
    Always test LEDs with a 12V source before installation. If an issue remains:
    • Verify correct wiring and no pinched/damaged wires
    • Provide your invoice, part number, supplier, and clear photo/video
    • Email warranty request to info@kodlinusa.com
    Wiring diagrams are available in the Tech Guide under Tech Tips.
  4. What is a 2-1 intensifier?
    It allows a two-wire LED (run or turn) to function as both, by combining two power inputs into one output. Not needed for parts K68500, K68501, K68510, or K68511.
  5. My 3-1 rear LED brake light is amber, not red. Why?
    This occurs if all four harness wires are connected directly. See the Tech Tip: M8 Softail OEM Light Harness to 3-1 LED Lights for correct wiring.
  6. Do I need a load balancer with LED signals?
    Usually not with BCM-equipped bikes. Run flashers to allow BCM to adjust. Older bikes without BCM will require a load balancer or equalizer.
  7. My turn signal has four wires, but the bike harness has two. What now?
    Your harness only supports turn signals. Add the two missing wires yourself or use a Kodlin harness designed for full 3-1 light functions.
  8. Are your LED signals plug-and-play?
    Some are, some are not. Plug-and-play models are noted on each product page under Description. Non-plug-and-play versions require splicing or a Kodlin harness.
Sheet Metal / Body Work
  1. Are sheet metal parts ready to paint?
    No. They are raw metal and must be prepped by a painter. Always test fit before painting. The Softail chin spoiler requires some assembly. Labor, prep, and paint are not covered by warranty.
  2. What is the bar height of engine and rear guards?
    • Engine guards: ~8.5” above lower frame rail; ~12.375” out from downtube (with slider)
    • Rear guards: ~10” above lower frame rail; ~9.5” out from frame
  3. Will rear crash bars need shims with aftermarket exhaust?
    Possibly. It depends on the exhaust mounting system.
Seats
  1. How do seats for Kodlin Rear Fenders mount?
    With a single bolt from underneath the fender for a clean, hidden look.
  2. Can I order custom seat covers or stitching?
    No. Seats are made to fixed specifications.
  3. Do you make seat pans?
    No.
Suspension
  1. Do I need to cut the dampener with your lowering kit?
    No. Our kits fit stock dampener sizes.
  2. Will lowering affect handling or cause scraping?
    Yes. Lowering changes handling and may increase scraping depending on setup and riding style.
  3. I can’t reach the lock nut on the Softail lowering kit.
    • Compress the spring further until a wrench fits.
    • Or finish installation and use a thin wrench through the spring coils.
  4. Do I need to replace a broken O-ring?
    Yes. It seals the bearing. Contact info@kodlinusa.com for help sourcing a replacement.
  5. How do I check if I have an external pre-load adjuster?
    Remove your seat and check the upper shock area. See the Tech Tip M8 Softail Shock Types and Lowering Kit Part Number.
  6. Do I need to adjust fork height when lowering?
    Not required. You may adjust for stock-like handling, but lowering reduces ground clearance.
  7. Do I need a shock spring tool?
    Yes. A proper tool is essential for safe installation. We recommend Kodlin tool K66030.
  8. Are your lowering kits adjustable?
    No.
  9. Do you rent shock tools?
    No. Used tools are not returnable.
  10. Can I use another brand of shock tool?
    Yes, if it safely compresses the spring. Never use an automotive strut tool.
  11. Do lowering kits affect chain/belt tension?
    Yes. Always check and adjust after changing ride height.
Performance
  1. Does the backing plate fit larger throttle bodies?
    The opening is ~64mm in diameter.
  2. How do I clean the air filter element?
    Follow K&N cleaning and re-oiling procedures.

Diagrams

*other models may vary

Pin position 1, Blue = Running light (open on some models)

Pin position 2, Violet = Turn Signal

Pin position 3, Open

Pin position 4, Black = Ground

Pin position 1, Blue = Running light to LED yellow wire

Pin position 2, Violet = Turn Signal to LED brown wire

Pin position 3, Blue/Red = Brake light to LED red wire

Pin position 4, Black = Ground to LED black wire

Wire extensions may be needed to fill pin position 1 and 3 depending on your model of bike

LED WIRE COLORS

YELLOW = Running Lights

BROWN = Turn Signal

RED = Brake

BLACK = Ground

NOTE:
On all models that only have stock turn signals functioning as run/turn/brake
lights you must have your BCM taillight configuration set to "Dedicated taillight".
This is typically done at Harley dealership or shop with that capability.
This will stop brake signal voltage from going to pin 2 and causing an amber
LED brake light. Brake signal will now only go through pin 3 for proper red
LED brake light.

Tech Tips

Tech Tips

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