Harley doesn’t use the 16-pin car OBD2 port. See the actual connector by model/year, plus 6 scan tools that fit, from adapter cable to shop-grade.
Category: Buying Guides
Harley buying guides: years to avoid, model comparisons, and which to buy used.
Best Gel Seat Cushion for Harley Touring (2026): Gel vs Air-Cell, and When an Airhawk Beats a Gel Pad
Gel seat pads help for a couple hours, then trap heat and bottom out. See when a pricier Airhawk air-cell cushion earns its 3x price on Harley Touring rides.
Best Jump Starter for a Harley-Davidson (2026): What CCA You Actually Need + Where to Clamp on a Bagger
Not every jump pack can turn over an 800-pound bagger. What CCA a Harley battery needs, where the battery hides on a Touring bike, and 6 packs compared.
Best Battery Tender / Charger for Harley-Davidson (2026): Lithium-Safe Picks + What Your Bike Actually Needs
Not every trickle charger is lithium-safe. Our research desk checked HD service manuals to find the right battery tender for your Harley’s battery.
Best Harley-Davidson Oil Change Kit: Engine, Primary & Transmission Kits Compared (2026)
We compared 8 Harley-Davidson oil change kits – complete engine/primary/transmission fluid bundles, tool-only kits, and standalone filters – and checked the capacities against factory service manuals so you buy the right size for your engine family.
Best Motorcycle Battery for Harley-Davidson (2026): AGM vs Lithium
Our research team pulled battery group size and CCA specs from Harley-Davidson factory service manuals to compare 7 AGM and lithium batteries across Dyna, Softail, Touring, and Sportster – plus a full AGM-vs-lithium breakdown on cold cranking, weight, price per year, and charger compatibility.
Best Motorcycle Cover for Harley-Davidson: 8 Covers Compared by Model Family
We compared 8 real Amazon-listed motorcycle covers by Harley frame family – Touring, Sportster, and Softail/Dyna cruiser – checking waterproof ratings, breathability, and lock-hole security against the HD Service Manual’s own storage procedure.
Harley Milwaukee-8 107 vs 114 vs 117: Which Displacement Should You Choose?
The Milwaukee-8 107, 114, and 117 differ in bore, torque output, cooling, and which models they come in. We compared service manual specs and owner forums to give you a straight answer on which displacement to buy.
Harley Softail vs Touring: Which Family Is Right for You (2026)
Softail vs Touring – which Harley family fits your riding style? Our spec-verified comparison covers weight, engine options (M8 107/114/117), fuel range, comfort, and price so you can choose with confidence.