🚚 Free Canada-wide shipping on orders over $199 (excluding oversized items)
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.
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
🚚 Free Canada-wide shipping on orders over $199 (excluding oversized items)
The same cloth-braided spark plug wires Prism Supply Co runs on every one of their own builds. Vintage-correct aesthetics with modern reliability — these wires are the finishing touch that separates a polished chopper or bobber from a stock-looking bike.
Each kit includes everything you need for a clean, complete install with no sourcing headaches.
Kit Includes
40" wire length
2 × 90° black spark plug boots
Black coil boots
2 × terminal ends
Details
Cloth braided outer sleeve for vintage style
Available in 10 colours including solid and tracer options
Used on all Prism Supply Co. in-house builds
Prism Supply Co DIY Electrical Kit
Regular price
$209.95
🚚 Free Canada-wide shipping on orders over $199 (excluding oversized items)
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 Prismvintage 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
Regular price
$39.00
🚚 Free Canada-wide shipping on orders over $199 (excluding oversized items)
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.
Prism Supply Co. Box Chopper Tail Light
Regular price
$245.00
Sale price
$229.95
🚚 Free Canada-wide shipping on orders over $199 (excluding oversized items)
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.
Prism Supply Co Vintage Cloth Covered 16g Electrical Wire
Regular price
$24.00
🚚 Free Canada-wide shipping on orders over $199 (excluding oversized items)
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.
