American V-Twin Diagnostics

Skip the $500 dealer diagnostic. Free circuit diagrams, DTC codes & torque specs. Guided troubleshooting paths for Twin Cam & Sportster — try Premium free for 3 days.

Your Harley is down. The dealer wants $300 just to look at it — and that's before a single wrench turns. Riding season doesn't wait, and neither should you.

Here's what a dealership diagnostic actually costs you:

Towing to the shop $300 – $500 Diagnostic inspection fee $90 – $300 Shop labor rate $160 – $190hr Total before any repair $500 – $1,000+ Wait time Days to weeks

American V-Twin Diagnostics gives you the same systematic, circuit-by-circuit diagnostic process a trained Harley technician uses — for the cost of one month's subscription. Know exactly what's wrong before you ever call a shop. Walk in informed, not at their mercy.

Unlike Bluetooth scan tools that spit out a code and leave you stranded, this app tells you what the code means, what circuit to test, and exactly what to do next. It's the difference between knowing and guessing — and the difference between a $10 fix and a $1,000 misdiagnosis.

—————————————— FREE — NO SUBSCRIPTION REQUIRED ——————————————

Circuit Wiring Diagrams — All 12 EFI and mechanical systems with component locations, wire colors, and connector pinouts DTC Code Lookup — 52 diagnostic trouble codes explained in plain English with probable causes and recommended fixes Torque Specifications — 98 specs for Twin Cam 88/96/103/110 and Sportster Evolution 883/1200 engines Service Intervals — Mileage-based maintenance schedules for Delphi EFI models Bike Selector & Specs — 80+ supported sub-models with motor-specific details

—————————————— PREMIUM — 3-DAY FREE TRIAL, THEN $9.99/MONTH ——————————————

Guided Diagnostic Paths — 12 proprietary step-by-step decision trees for every major system: ignition, fuel, starter, sensors, security, ECM, brakes, suspension, steering, clutch, and more. Each path adapts to your test results and narrows down the root cause — no guesswork, no wasted parts. Mechanic's Checklist — A comprehensive Delphi EFI health assessment with pass/fail grading, measurement fields, and a printable PDF — the same structured inspection a pro shop would charge you $150 to perform. Motorcycle Garage — Save up to 3 bike profiles with full specs, mileage tracking, and service history PDF Diagnostic Reports — Generate branded, shareable reports with circuit diagrams, findings, and recommended actions Service Records & Notes — Log every service and store notes per bike Diagnostic History — Every completed diagnostic saved and reviewable

—————————————— BUILT FOR YOUR SPECIFIC BIKE ——————————————

Select your exact year, model, and engine — Sportster, Dyna, Softail, Touring, or CVO — and the app filters everything to your platform. Twin Cam and Evolution Sportster diagnostics are handled separately. Magneti Marelli EFI models are flagged automatically.

No hardware. No dongle. No adapter. Just your phone and your motorcycle.

Download American V-Twin Diagnostics. Diagnose it yourself — before you hand over the keys and the cash.

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