Prism Supply

Vintage Cloth Covered 16 Gauge Electrical Wire

Upgrade your motorcycle's electrical system with authentic vintage-style cloth covered wire from Prism Supply Co. Perfect for custom builds, restorations, and period-correct wiring harnesses.

Premium Construction

• Multi-strand copper conductor for reliable conductivity
• PVC insulation with cotton braid and lacquer finish
• 16 gauge wire suitable for most motorcycle electrical applications
• Made in the USA with quality materials

Specifications

• Wire Gauge: 16 AWG
• Length: 10 feet per section
• Insulation: PVC with cotton braid
• Finish: Lacquered cotton
• Country of Origin: USA

Available in 13 Authentic Colors

Choose from a wide range of vintage-inspired colors to match your build: Black, White/Blue Tracers, Grey/Black Tracers, Black/Red Tracers, Green/Black Tracers, Orange/Black Tracers, White/Black Tracers, Red/White Tracers, Brown/Black Tracers, Blue/White Tracers, Black/White Tracers, White/Red Tracers, and Black/Orange Tracers.

Applications

Ideal for vintage motorcycle restorations, custom choppers, bobbers, cafe racers, and any build requiring period-correct wiring. Compatible with most electrical systems requiring 16 gauge wire.

DIY Electrical Kit

Not sure what to order for your electrical kit?  We've got you covered! This kit is designed to wire the majority of any non-electric start choppers or cafe racers. (Wiring for an electric starter requires a larger gauge ground wire and power wire which isn't included)

If you feel like you may need an extra wire you can always purchase some of the Prism vintage cloth wire.

The electrical kit includes the following:

• Tackle Box
• 2 x 6 in - 1/2" heat shrink
• 3 x 6 in - 1/4" heat shrink
• 3 x 6 in - 0.19" heat shrink
• 1 - Universal 3-Position Key Switch
• 10 - Male Quick Disconnect
• 10 - Female Quick Disconnect
• 10 - Butt Splice
• 5 - 1/4" Ring terminal
• 10 - #10 Ring Terminal
• 4 ft - 1/4" Heat Resistant Loom (fits 3 wires through it)
• 4 x 10ft sections of 16 gauge electrical wire (Black, White, Brown, and Green)
  
• 10 - 6" zip ties
• 1 - Auto Re-Setting Circuit Breaker Kit

Glass License Plate Jewels

These vintage style glass jewels are great for mounting your license plate or any other mounting application.  They consist of a #10 mounting shaft.  Sold as a pair.

The Prism Supply Co. Box Chopper Tail Light is a modern LED take on the classic old-school chopper box light — slimmer than the original and built from aluminum so you can polish, chrome, powdercoat, or leave it raw to match your build.

Equipped with a dual-function LED cluster that handles both running and brake light duties, it wires cleanly through the back of the housing for a tidy install.

Specifications

• Housing: 4-1/4" L x 3/4" W x 2-1/8" H (original style: 4-1/4" x 2" x 2")
• Dual-function LED cluster — running & brake light
• Wires exit through rear of housing
• Aluminum housing — polish, chrome, powdercoat, or raw finish options
• Includes two stainless steel 1/4-28 mounting bolts, spaced 3.5" apart

Available Finishes

• Brushed Aluminum
• Polished Aluminum

Compatibility

Designed for custom choppers and bobbers. The slimmer profile compared to the original makes it ideal for tight tail section builds.

Quick Stick Start Lever — Clean Handlebar Starter Solution

Eliminate oversized handlebar start button switches with a direct-mount starter lever.

The Quick Stick Start Lever bypasses all factory start button wiring with a simple 3-screw installation directly to your starter solenoid. Clean, functional, and vintage-inspired.

Compatibility

• 1991+ Harley-Davidson Sportster
• 1989+ Harley-Davidson Big Twin
• Note: Exhaust clearance required — see installation images to verify fitment with your exhaust system

What's Included

• Direct push-button solenoid bypass (chrome finish)
• Stainless steel lever and mounting bracket (tumbled finish)
• 3x stainless steel mounting screws
• Replaceable knob compatible with all Prism Supply Co. shift knobs

Installation

Remove your starter solenoid cover, install the Quick Stick with three screws, and you're done. No complex wiring — just clean, direct activation.

The Prism Supply Co. 1/4" NPT Petcock threads directly into a 1/4" NPT bung on your gas tank for a clean, flush look with no external hardware cluttering your build. A 5/16" diameter hose barb on one end and a built-in fuel filter on the other keep your fuel system tidy and protected. Toggle fuel on and off by rotating the cylindrical piece — the fuel line stays stationary while you do it.

We recommend pairing this with 1/4" fuel line for a snug, leak-proof fit.

Lifetime Guarantee: All Prism Supply Co. petcocks are guaranteed for life. If you ever have an issue, send it back and they'll rebuild it at no charge.

Specifications

• Thread: 1/4" NPT (National Pipe Thread — tapered, seals on tightening)
• Hose barb: 5/16" diameter
• Built-in fuel filter included
• Twist on/off — fuel line does not rotate during operation
• No reserve
• Available in Brass or Stainless Steel

NPT Compatibility Note

Many custom and aftermarket gas tanks use a 1/4" or 3/8" NPT petcock bung. If your tank has a 22mm bung, petcock adapter nuts are available in brass or chrome to convert it to accept 1/4" or 3/8" NPT petcocks.

Available Options

• Brass — warm classic finish, great for polished or raw builds
• Stainless Steel — corrosion-resistant with a clean modern look

Vintage-Inspired Safety Glasses for Riders and Makers

Classic ANSI Z87.1 certified safety glasses with vintage styling and modern protection. These retro safety glasses feature side shields to keep bugs, metal shavings, wood chips, debris, and wind out of your eyes—whether you're in the garage or on the road.

Key Features

• Meets ANSI Z87.1 Safety Standards for impact protection
• Vintage-inspired design with integrated side shields
• Durable plastic lenses and frames
• Perfect for workshop use and motorcycle riding
• Available in Clear, Tinted, and Green lens options

Choose Your Lens:

• Clear - Maximum visibility for indoor work and night riding
• Tinted - Sun protection for daytime riding and outdoor work
• Green - Reduces glare while maintaining color accuracy

"I wear these myself in the garage but also as riding glasses and I love them!" - Jeff

Weld-On Flat Tail Light

These tail lights are perfect for that weld-on application.  Works great welded to a sissy bar moulded to a frame or welded to a license bracket.

These dual-function 1.25" LED's act as a brake light and running light. The size of the housing is 1.5" diameter x 4/5" long.

The Prism Supply Co. PS-41 Tail Light is a precision-crafted, modern LED interpretation of the iconic RH-55 Guide Light that originally graced Panheads and Ironheads. At 30% smaller than the original, it delivers that unmistakable vintage silhouette in a compact, waterproof package — built to last and designed to turn heads.

What's Included

• Aluminum housing — available in Brushed or Polished finish
• Injection-molded Prism Supply lens
• Dual-brightness 1.85" diameter waterproof LED (running & brake)
• Stainless steel mounting hardware

Specifications

• Overall dimensions: 3.375" x 2.5" x 1" thick
• 30% smaller than the original RH-55 Guide Light
• Waterproof LED — suitable for all weather riding

Compatibility

Designed to complement classic Harley-Davidson Panhead and Ironhead builds. A natural fit for custom choppers and bobbers seeking a period-correct tail light with modern reliability.

Triple Tree Mirror Mount - 39mm

If you're looking to clean up your handlebars and still run a mirror, we have the solution for you. This kit eliminates any handlebar mirror clamp and allows you to run it directly to your top triple tree on a 39mm front end. The 39mm kit requires an adapter piece which is why the subtle price increase. The mirror stems and adapters are made from stainless steel.

The mirrors are 3" in diameter and come in a chrome finish

39mm Thread: 3/8-16

The Prism Supply Co. Super Prism Throttle Assembly is a precision-machined, polished aluminum throttle built for custom Harley-Davidson builds. Designed for a clean, minimal look with reliable 1/4 turn action and full compatibility with stock HD throttle cables.

What's Included

• Polished aluminum throttle housing
• 1/4 turn action with built-in internal stops
• 1" aluminum throttle sleeve
• All necessary mounting hardware
• Throttle Lock Screw

Compatibility

• Designed for use with all stock HD throttle cables with snap ring
• Includes a barrel end to cut the cable to your desired length

Recommended Add-Ons

For a designed fit, pair this throttle with the Prism Supply Co. Throttle Cable. The Clear Throttle Cover is also available and sold separately.

Darlington Air Cleaner

Get rid of your bulky air cleaner and show off that H-D Engine! The Prism Supply Co. Darlington Air Cleaners were designed to achieve a clean, classy, and traditional look while maintaining maximum performance. These are beautifully machined from a solid chunk of 6061 aluminum and are available with either a polished or brushed finish. The internal venturi was designed to allow for maximum airflow. The mounting hardware for the cover is installed from the backside and gives that minimal look we all strive for.

With our combination of heavy and fine filtering elements, we can guarantee you’ll be keeping all that unnecessary crud out of your engine. If you ever are in need of a replacement filter element, those can be purchased here.

This compact kit is designed to be used on all H-D engines that use a CV carburetor or factory EFI units (excluding throttle by wire models)

Dimensions are as follows:

• 5.5” diameter
• 1.5” total depth

*Some basic jetting/ tuning may be required upon installation to maintain the correct air/ fuel mixture.

*When installing, it is recommended to use a carburetor support bracket.

Petcock 1/8" NPT

The Prism Supply Co petcocks are guaranteed for life! If you're having an issue with it you can send it back to them and they will rebuild it for no additional cost!

This unique petcock fits direct to a 1/8 BSP thread on your gas tank. This keeps your gas tank looking very clean. It features a 5/16" diameter hose barb on one end and a fuel filter on the other. We recommend using our 1/4" Fuel Line for a snug, leak-proof fit. Rotating the cylindrical piece with the two grooves is how the fuel is toggled on and off. The fuel line does not rotate while toggling the fuel on/off. No reserve. 

The Prism Supply Co. 3/8" NPT Petcock threads directly into a 3/8" NPT bung on your gas tank for a clean, flush look with no external hardware cluttering your build. A 5/16" diameter hose barb on one end and a built-in fuel filter on the other keep your fuel system tidy and protected. Toggle fuel on and off by rotating the cylindrical piece — the fuel line stays stationary while you do it.

We recommend pairing this with 1/4" fuel line for a snug, leak-proof fit.

Lifetime Guarantee: All Prism Supply Co. petcocks are guaranteed for life. If you ever have an issue, send it back and they'll rebuild it at no charge.

Specifications

• Thread: 3/8" NPT (National Pipe Thread — tapered, seals on tightening)
• Hose barb: 5/16" diameter
• Built-in fuel filter included
• Twist on/off — fuel line does not rotate during operation
• No reserve
• Available in Straight or 90° outlet, Brass or Stainless Steel

NPT Compatibility Note

Many custom and aftermarket gas tanks use a 3/8" NPT petcock bung. NPT (National Pipe Thread) is a tapered thread that seals as you tighten the petcock into the fitting. If your tank has a 22mm bung, adapter nuts are available in brass or chrome to convert it to accept 3/8" NPT petcocks.

Available Options

• Brass / Straight — classic warm finish, standard inline routing
• Stainless / Straight — corrosion-resistant, standard inline routing
• Brass / 90° — classic warm finish, ideal for tight or angled fuel line routing
• Stainless / 90° — corrosion-resistant, ideal for tight or angled fuel line routing

Auto-Resetting Circuit Breaker Kit

This Auto Resetting Circuit Breaker Kit consists of an AT0 inline fuse holder and auto-resetting, 10 amp blade circuit breaker. The wire is not included but can be purchased here

The way this fuse holder is designed eliminates the need for any soldering or crimping, requiring very little tooling to install. 

Some advantages of using our circuit breaker kit over a fuse are below:

• The circuit breaker auto resets after tripping, eliminating the need to ever replace a fuse
• The circuit breaker is more sensitive than a fuse, which causes it to trip quicker. 

The Prism Supply Co. Ripple Tail Light is purpose-built for weld-on applications — whether you're integrating it into a sissy bar, moulding it to a frame, or mounting it to a license bracket. Its compact round housing keeps the profile clean while the dual-function LED handles both running and brake light duties.

Specifications

• Housing: 1 7/8" diameter x 1" long
• Dual-function 1.25" LED — running & brake light
• Includes both flat and dome lens
• Available in Mild Steel or Stainless Steel

Available Options

• Mild Steel — ideal for welding, painting, or powdercoating
• Stainless Steel — corrosion-resistant, raw or polished finish

Compatibility

Designed for custom choppers, bobbers, and cafe racers where a weld-on tail light solution is needed. Works great integrated into sissy bars, frames, or license plate brackets.

External Weld-On Cable/Wire Guide

Looking for a way to clean up your cables and/ or wiring? The folks at Prism Supply Co. have you covered! These weld-on cable guides are perfect for cable and wire route planning during your build. With both an internal and external wiring option, your wiring will look cleaner than anyone else's! 

• Work perfectly for electrical wires, throttle cables, clutch cables, and brake cables
• These come in raw steel.
• Can be welded/ brazed on.
• Can work with either throttle cable or electrical wires.
• Each guide is sold individually.

The Prism Supply Co. 90° Petcock is an extension of the classic Prism petcock lineup — same minimalist design and bulletproof performance, now with a 90-degree outlet to open up new fuel line routing options on your build. Twist right to close, twist left to open. Simple, intuitive, and built to last.

For a snug, leak-free fit, run 1/4" fuel line with this petcock.

Lifetime Guarantee: All Prism Supply Co. petcocks are guaranteed for life. If you ever have an issue, send it back and they'll rebuild it at no charge.

Specifications

• Thread: 1/4" NPT
• Outlet angle: 90 degrees
• Recommended fuel line: 1/4"
• Available in Brass or Stainless Steel
• Twist on/off operation — right to close, left to open

Available Options

• Brass — classic warm finish, ideal for polished or raw builds
• Stainless Steel — corrosion-resistant, clean modern look

5/16" Counterbore Bungs

These bungs are sold as a pair and can be purchased as mild or stainless steel and allow for the head of an allen bolt to sit flush inside. 

Outside measurements are as follows:

• 3/4" diameter
• .625" long