A check engine light on your Harley stores a DTC – Diagnostic Trouble Code – that you can read yourself using the trip odometer button. Our research decoded the 2019 M8 Service Manual step-by-step procedure plus a full table of common Milwaukee-8 fault codes with plain-English meanings and fixes.
Category: Harley Davidson
Harley Softail Years to Avoid (Every Model Year Breakdown)
Avoid 2000–2006 Twin Cam 88 (cam chain tensioner failures) and 2018–2019 M8 (rear shock recall). Best Softail years: 2020+ Milwaukee-Eight or 2012–2017 Twin Cam 103. Full era-by-era breakdown with NHTSA recall data and service manual specs.
Best Crash Bars (Engine Guards) for Harley-Davidson: 2026 Guide
Harley-Davidson crash bars and engine guards reviewed across all frame families – Touring, Softail, Sportster, and Dyna. Fitment notes with exact year ranges and frame designations, OEM torque specs from the HD Service Manual, and honest pros/cons for HD OEM, HogWorkz, Lindby, and Bung King.
Harley Fat Boy Years to Avoid (and the Best Years to Buy Used)
The 2007 Fat Boy is the one year to avoid — NHTSA fire recall plus first-year EFI and cam tensioner issues. Best buy: 2020–2024 Milwaukee-Eight 114. Full year-by-year breakdown with NHTSA recall numbers and service manual citations.
How to Check the Oil on a Harley-Davidson (the Right Way)
Learn how to check the oil on a Harley-Davidson the right way: hot engine, jiffy stand, dipstick wiped first. Step-by-step for Milwaukee-8, Twin Cam, and Sportster with service manual citations.
8 Best Harley Pan America 1250 Accessories (2026) – Tested by Owners
The best Harley Pan America 1250 accessories in 2026, based on 200+ owner forum threads: crash bars, skid plate, auxiliary lights, windscreen, phone mount, luggage, bar risers. Research-backed picks for RA1250 owners.
Harley Road Glide Years to Avoid (and the Best Years to Buy Used)
The Road Glide years to avoid are 2015-2016 (Twin-Cooled overheating) and 2017-2018 (Milwaukee-Eight oil sumping, plus recalls 17V333000 and 18V734000). Best years: 2012-2013 Twin Cam 103 on a budget, 2020+ M8 for peace of mind.
Harley Revolution Max Oil Capacity & Type (Sportster S, Nightster, Pan America)
Revolution Max oil capacity is 4.75 quarts (4.5L) for all models — Sportster S, Nightster, and Pan America. Full spec table by model, correct warm-check procedure (TSB M1631), oil type recommendations, and filter P/N 62700280.
Best Motorcycle Intercom for Harley Touring (Cardo vs Sena): Our Top 8 Picks
Cardo Packtalk Edge is the best motorcycle intercom for Harley Touring in 2026. We compared 8 Cardo vs Sena models – DMC mesh, batwing fairing fit, battery life, and HD Boom Audio OEM integration explained.