Catching up with Chris Promethean Liver #466

A wiring schematic is a diagram that shows how electrical components are connected—typically including wire colors, connectors, and routing paths. It’s especially useful for restoring or modifying a motorcycle’s electrical system because it helps you replicate the factory layout or correctly integrate new parts.

A wiring harness is the bundled set of wires and connectors that carries power and signals throughout the vehicle. Swapping an original wiring harness for a new one is a common restoration approach when the old harness is damaged, hacked, or missing correct connectors.

The speedometer is the instrument that displays vehicle speed to the rider/driver, usually driven by a sensor signal. In wiring projects, speedometer integration is often a key step because it requires correct signal routing and compatibility with the rest of the bike’s electrical system.

An exhaust system is the set of components that routes engine exhaust gases out of the vehicle, typically including headers, pipes, and mufflers. The host’s mention of “building exhaust systems” and “flowing really well” points to tuning for exhaust flow characteristics, which can affect how smoothly the bike breathes.

Moto gadget is an aftermarket electronics brand commonly used in custom motorcycle builds. In this segment, the host mentions an “M unit” from Moto gadget, which is a controller/module that changes how the bike’s electrical system is wired and behaves.

In motorcycle wiring, “ground” refers to the electrical return path (often the frame or battery negative) that completes a circuit. The host notes that to illuminate a turn signal, the circuit goes to ground, which highlights how signal behavior depends on correct grounding and routing.

A turn signal is the motorcycle’s directional indicator system, typically controlled by the bike’s flasher/logic and wiring. In custom builds, aftermarket modules can change how the turn signal circuit is triggered—especially around grounding and signal routing—so it can behave differently than stock.

The horn is a motorcycle electrical accessory that’s often part of the handlebar controls and wiring harness. The host mentions that many custom motorcycle builders remove the horn early to gain access to the reset/troubleshooting area, showing how custom packaging can affect what gets temporarily taken out.

A “hard reset” is a forceful restart of an electronic control module, clearing its current state so it can boot back up. The host says they had to hard reset the system because it wasn’t behaving correctly, implying the module’s stored state or logic needed to be cleared.

Choppers are a custom motorcycle style known for stretched frames, distinctive silhouettes, and a highly personalized look. The host uses it to describe the type of bikes they run quality parts on.

Arlen Ness is a custom motorcycle brand and retailer best known for big, showy baggers and choppers. When the host points to Arlen Ness.com for “new drops for 2026,” they’re referencing the brand’s latest motorcycle accessories and models.

Kabuto is a motorcycle helmet brand known for aerodynamic helmet designs and race-focused safety engineering. In this segment, the host highlights features like a wake stabilizer and crest spoiler, plus materials and safety standards intended to reduce wind buffeting at high speed.

A wake stabilizer on a helmet is an aerodynamic feature meant to manage airflow separation behind the helmet. The goal is to reduce turbulence and improve stability at speed, so the helmet feels more “locked in” rather than buffeting.

A crest spoiler is an aerodynamic add-on or shape that helps control airflow over the top/front “crest” area of the helmet. It’s used to reduce lift and turbulence so the helmet stays stable as wind pressure increases.

“Triple digit speeds” refers to riding speeds above 100 mph (160 km/h). At those speeds, helmet aerodynamics and stability matter a lot because wind buffeting and turbulence can become uncomfortable or distracting.

MIP safety standards refer to a specific helmet safety certification/standard referenced by the brand. The host is using it to reassure listeners that the helmet meets defined impact-protection requirements.

“F 17” is the specific Kabuto helmet model the host says they’ve been wearing. It’s described as a full-face MotoGP race helmet, meaning it’s designed for track-style protection and high-speed riding.

Harley-Davidson is a major American motorcycle brand strongly associated with cruiser-style bikes and a huge enthusiast community. In this segment, the host is contrasting a Harley-Davidson with a “chopper,” implying the bike is being customized beyond the typical Harley look.

“Chopper method” here is a builder’s philosophy: starting from a base bike and then removing factory-prescribed parts or setups in favor of custom, sometimes unconventional choices. The idea is to build it yourself and iterate toward a personal “ideal” outcome rather than following standard instructions.

“Fuel injected” means the engine meters fuel using an electronic fuel-injection system rather than a carburetor. Fuel injection typically uses sensors and injectors to deliver the right amount of fuel for current conditions.

A throttle body is the air-control valve assembly used in many fuel-injected engines. The host’s point is that carburetors are visually simpler than throttle-body setups because throttle bodies are integrated with more sensors/wiring and related components.

A fuel injector is the component in a fuel-injection system that sprays fuel into the intake (or sometimes directly into the cylinder). In the host’s comparison, the “fuel injector sticking out” is part of what makes fuel injection look less visually “clean” than a carburetor setup.

A magneto is an ignition system component that generates high voltage using a rotating magnet, independent of the car/bike’s battery. On many older or custom motorcycles, the magneto is what creates the spark to ignite the air-fuel mixture.

“Throwing a code” refers to an electronic control unit (ECU) detecting a fault and storing/communicating a diagnostic trouble code. The host is describing how incorrect wiring or a missing signal can trigger the bike’s electronics to refuse normal operation.

In motorcycle electronics, “wires” are part of the sensor/actuator network that carries signals to the bike’s control modules. The host’s scenario is that a small irregularity in a wire can cause the system to think something is wrong and disable features.

Eye bolts are fasteners with a looped head used to attach or route things—often wiring or straps—securely. In this context, they’re being used as grounding points, meaning the bolt provides a solid electrical connection to the bike’s structure.

Fueling refers to how the engine receives and meters fuel—how much gas is delivered and when. On carbureted bikes, fueling quality depends heavily on carb setup (jetting, mixture, and throttle response), which is why people argue about whether carburetors are “reliable.”

Choking a carburetor means restricting airflow (or enriching the mixture) to help a cold engine start. It’s a basic starting procedure on many carbureted motorcycles, but it’s also something riders need to do correctly to avoid flooding or hard starting.

EFI stands for electronic fuel injection, meaning the bike’s fueling is controlled by electronics rather than a carburetor. When an EFI system fails, troubleshooting often requires reading diagnostic trouble codes and checking sensors/relays rather than just adjusting mixture screws.

A scan tool is a diagnostic device used to communicate with a vehicle’s computer (ECU) and retrieve fault codes. It helps pinpoint what failed in systems like EFI by showing stored errors and live sensor data.

Ducati is an Italian motorcycle brand known for performance-focused engines and distinctive engineering. In this segment, the host is working on a Ducati “parts bike” with a 900 Super Sport-style setup, and they’re discussing how the engine’s fuel system was updated over time.

Fuel injection is a system that meters fuel into the engine using electronic controls rather than a carburetor. The speaker notes this bike is an early “first or second year” of fuel injection, and they’re debating whether to keep it or convert back to carburetion.

“Daily bike” is a rider-focused category meaning the motorcycle is expected to be reliable and easy to live with for everyday commuting. That context drives the speaker’s choice to keep fuel injection rather than convert back to carburetors.

Jetting is the tuning of a carburetor’s fuel delivery by changing jet sizes. It directly affects how rich or lean the air-fuel mixture is at different throttle openings, which is why small changes can fix (or cause) starting and low-speed issues.

The pilot jet meters fuel at idle and very small throttle openings (the “off-idle” range). If the pilot jet is too large, the engine can run rich and flood—often showing up as hard starting, bogging, or needing less throttle than expected to keep it lit.

An intermediate jet is a carburetor fuel jet that meters fuel during the mid-throttle range, between the pilot circuit (very low throttle) and the main jet (higher throttle). If it’s sized wrong, the bike can feel flat, stumble, or transition poorly when you roll into the throttle.

The main jet meters fuel at higher throttle openings, where the carburetor transitions from the intermediate/pilot circuits to the main circuit. Incorrect main-jet sizing can cause poor pull at speed, overheating, or surging depending on whether it’s too rich or too lean.

Flooding is when too much fuel gets into the engine (often from an overly rich mixture or too much throttle during starting), preventing proper combustion. In carbureted setups, it’s commonly tied to pilot/transition jetting and throttle technique.

SNS carbs refers to a carburetor brand/model line (SNS) used on the bike being discussed. The host claims a known drivability quirk—hiccup and cough around small throttle openings—so it’s treated as a characteristic of that carb setup rather than a random problem.

Quarter turn throttle refers to a small, specific throttle opening (about a quarter of the throttle’s travel) where many carbureted bikes show a noticeable stumble or hesitation. The host is describing a common “hiccup and cough” behavior at that exact opening.

Altitude affects engine fueling because air density drops as you go higher, changing the air/fuel ratio. That’s why jetting that works at one elevation may not work at another—especially on carbureted bikes—often requiring different jet sizes or other tuning.

Throttle position is how far the throttle is opened, which determines how much air the engine can take in. In carbureted setups, throttle position strongly influences which jetting settings are effectively “in play,” so it can change fuel usage and how rich/lean the mixture becomes.

“Higher speeds” here is about how the bike’s behavior changes as airflow and engine load increase, which can expose fueling or setup problems that don’t show up at lower speeds. That’s why riders often test at highway speeds after carb/jetting changes.

Handlebar vibration is a common symptom of an engine or drivetrain running condition that’s not quite right, or of resonance at certain speeds. In carbureted bikes, it can also correlate with fueling issues (like incorrect jetting) or changes in how the bike is being loaded.

This refers to a Harley-Davidson hardtail chopper: a custom motorcycle style built around a rigid rear end (no rear suspension). The “chopper” part usually means a stretched, aggressive geometry, and the “hardtail” setup tends to feel more rigid over bumps.

“Rake angle” is the steering head’s angle on a motorcycle, and making it very steep changes how the front end behaves. A super steep rake can reduce how easily the front suspension compresses, so the bike can feel rigid even when it has forks.

Motorcycle “forks” are the front suspension legs, and “compress” means they move inward under load. If the forks don’t compress easily, the front end will feel harsh or rigid over road irregularities.

“Fork oil” is the hydraulic fluid inside the motorcycle’s front forks that controls damping. A “five weight” oil is relatively light, which can affect how quickly the forks move and how much resistance they provide.

Mild steel is a common, relatively low-cost steel alloy with modest strength and stiffness compared with specialty steels. In a build, it’s often chosen for easier fabrication and predictable behavior, but it may require thicker sections to achieve the same strength as higher-grade materials.

Chromoly (short for chromium-molybdenum steel) is a higher-performance steel alloy used in performance and structural builds. It can be stronger and more fatigue-resistant than mild steel, and it’s often chosen when you want thinner tubing with similar strength—though it may require more careful processing to get the desired material properties.

Royal Enfield is a motorcycle brand known for classic, retro-styled bikes with a strong following among riders who like traditional design. In this segment, the hosts mention Royal Enfield of North America and how the company sets up operations in places with established motorcycle communities.

Triumph is a major British motorcycle brand with a long racing and heritage history. Here, the hosts say Royal Enfield set up its headquarters next to Triumph in England, framing it as a deliberate strategy to be near a dense motorcycle ecosystem.

“Wrangler” refers to the Jeep Wrangler, a rugged off-road SUV that’s popular for customization. In this context, “cult Wrangler” means a highly personalized, enthusiast-built version where the owner’s fabrication and styling choices are the point.

Cafe racers are a motorcycle style built around a stripped-down, lightweight look and a more aggressive riding posture. The hosts connect cafe racer aesthetics to the “fabrication side” of other custom bike cultures, emphasizing how builders customize both parts and appearance.

“Chevy 350” refers to the Chevrolet small-block V8 displacement of 350 cubic inches, a popular engine swap choice because it’s widely supported and parts are easy to find. In a project like this, it’s being used as the powerplant inside a Lotus-style Formula One–inspired chassis.

A transaxle is a combined transmission and differential unit, typically packaged together at the rear of the car. Putting it in a lightweight, race-car layout helps with weight distribution and can simplify drivetrain packaging for handling-focused builds.

Colin Chapman was the founder and chief designer behind Lotus, and he’s famous for shaping how race cars were engineered in the 1960s. The host credits him with defining handling characteristics for race cars, reflecting Chapman’s emphasis on lightweight construction and chassis design.

LiveWire is Harley-Davidson’s electric motorcycle brand. The host brings it up alongside Harley as a possible acquirer, framing the move as part of the shift toward electric two-wheelers.

Dust Moto is an American dirt-bike brand mentioned here as the subject of an acquisition. The host describes it as building an electric dirt bike positioned around a 250-class equivalent, aiming to compete in the electric off-road space.

Colin Godby is the founder mentioned for Dust Moto. The host says he previously worked as a lead engineer at Upco, tying his background to electric two-wheeler development.

Upco is referenced as an electric two-wheeler company founded in Australia. In the segment, it’s used to explain Colin Godby’s prior engineering role before founding Dust Moto.

Stark is referenced as another electric dirt-bike brand used for positioning Dust Moto’s product. The host frames Dust Moto as aiming for a middle ground between Stark and Surran in the electric off-road market.

Surran is mentioned as one of the reference points for where Dust Moto’s electric dirt bike will “slot in between.” The host uses it as part of a lineup comparison rather than discussing technical details.

“250 equivalent” is a class-matching way to describe an electric dirt bike’s intended performance level relative to a traditional 250cc gasoline bike. It’s a marketing/benchmark shorthand that helps riders compare power and ride feel across different powertrains.

“Pre-sold” here means the company took orders and sold bikes ahead of delivery. The host uses it to highlight a gap between promised delivery timing and when customers actually receive the product.

“Kiss of death” here is a business concept describing a strategy where a buyer pressures a company by effectively letting it fail first, then acquiring it cheaply. In the segment, the host applies it to electric-bike startups: invest too late, then buy the brand “for pennies on the dollar.”

Market validation is evidence that customers actually want a product, often shown through pre-orders or early demand. The host argues that getting pre–LiveWire orders helped prove the concept before the brand fully launched.

“Top of funnel” is marketing jargon for the early stage of customer awareness—getting people to notice a product before they’re ready to buy. The host credits early investment, pre-orders, and awareness-building with creating that top-of-funnel momentum.