V-Twin Diagnostics

Free for every Harley rider: smart service reminders, DTC codes, torque specs & bike specs. Then diagnose with symptom-based Q&A. Premium free 3 days, $9.99/mo.

Every Harley rider should have this on their phone — free.

Start with the free Smart Service Scheduler so you never miss a service interval, plus free DTC code lookup, torque specs, service intervals, and your bike's exact specs. No hardware, no dongle, no scan tool — just your phone.

When something's wrong, skip the $500–$1,000 dealer diagnostic. V-Twin Diagnostics walks you through a simple symptom-based Q&A: answer plain questions about what your bike is doing — won't start, no spark, stalls when hot, spongy brakes — and it correlates those behaviors to the probable component failure behind them, the way a seasoned tech reasons it out.

Built specifically for 2007–2017 Harley-Davidson motorcycles with Delphi EFI — Sportster 883/1200, Dyna, Softail, Touring, and CVO 110ci.

FREE — every rider should have it

• Smart Service Scheduler — free maintenance reminders by mileage
• 71 DTC trouble codes in plain English with probable causes
• 119 torque specs for Twin Cam & Sportster Evo engines plus per-platform chassis
• Service intervals + bike-specific specs (pick your exact year/model/engine)
• Your garage — register your bike with service records & notes

PREMIUM — 3-day free trial, then $9.99/month

• Guided symptom-based diagnostic paths — 12 decision trees that narrow to the probable part
• Circuit diagrams for all 12 EFI and mechanical systems
• 49 component cards showing the actual part behind each probable cause
• Mechanic's checklist with pass/fail grading + printable PDF
• Up to 3 garage profiles + diagnostic history
• Branded PDF diagnostic reports

WHY IT'S DIFFERENT — Unlike Bluetooth scanners that only read a code, this gives you the reasoning: what the behavior means and which part to check. It names probable causes and, when it's ambiguous, tells you to see your dealer. Knowledge, not guesswork.

Download free and start with the Smart Service Scheduler — diagnose, not guess.

Harley-Davidson and related model names are trademarks of Harley-Davidson Motor Company, used for compatibility reference only. V-Twin Diagnostics is an independent product of Classified AI LLC.

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