Independent Harley-Davidson research & free tools
VIN decoder, recall lookup, tire pressure and loan calculators. No signup, no email gate. Plus deep, vendor-neutral research on Harley problems, gear and ownership.
Decode my Harley VIN →Free Harley Tools
Browser-based calculators and lookups. No signup, no email gate.
Most usedVIN Decoder + Recall Lookup
Decode any Harley VIN: year, model, engine and plant. Plus live NHTSA recall checks in one step.
→Tire Pressure Calculator
Exact PSI by model, year, load (solo / 2-up / luggage) and temperature.
Loan Calculator (Pro)
50-state tax, APR by credit tier, amortization, scenario compare, depreciation.
Oil & Fluid Capacity
Exact engine oil, primary and transmission capacities by engine family, from HD manuals.
DTC Code Decoder
Look up any Harley trouble code: meaning, severity and likely causes.
Browse by Harley Model
Common Problems & Fixes
Electrical Issues
Voltage regulator symptoms, stator problems, charging diagnostics
Engine Comparison
Evo vs Twin Cam vs Milwaukee-8, which generation is right for you
Brakes & Stopping
Touring brake pads, replacement guides, stopping distance
Maintenance Reference
Tire pressure chart, oil specs, torque values
Latest Harley Research
- Best Motorcycle Battery for Harley-Davidson (2026): AGM vs Lithium
- Best Harley-Davidson Oil Change Kit: Engine, Primary & Transmission Kits Compared (2026)
- Best Motorcycle Cover for Harley-Davidson: 8 Covers Compared by Model Family
- Best Battery for Harley-Davidson Street Glide: 8 Picks for M8 Touring
- Loctite 271 vs 272 for Harley: Which Red Threadlocker? (2026)
- Harley Milwaukee-8 107 vs 114 vs 117: Which Displacement Should You Choose?
What Our Research Desk Reaches For
Four picks that come up again and again in our maintenance research, each with the full guide behind it.
Battery Tender Junior 12V
The maintainer our research sees recommended most for bikes that sit between rides. Winter lay-up starts in weeks.
Check on Amazon Battery tender guide
Fitted Touring Motorcycle Cover
Cut for Road King, Road Glide, Street Glide and Electra Glide rather than sold as one universal size.
Check on Amazon 8 covers compared
Castrol Power1 V-Twin 20W-50
A full synthetic blended for air-cooled V-twins, not a car oil relabelled for bikes.
Check on Amazon 20W-50 oil guide
Weize YTX30L-BS AGM Battery
The 28Ah / 405 CCA group size Harley specifies for Touring models, per the factory service manual.
Check on Amazon AGM vs lithiumDisclosure: BackyardRider.com earns a commission from qualifying Amazon purchases. Prices and availability are set by Amazon and can change.
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An independent Harley-Davidson research desk
Not a dealer, not a retailer. We cross-check every guide against primary sources.