2012 Harley-Davidson FLTRX Road Glide Custom — Common Issues & Known Problems
Known Issues & Owner Reports
These are the most commonly reported issues and concerns from owners, mechanics, and community forums for the 2012 Harley-Davidson FLTRX Road Glide Custom.
Voltage Regulator Failure
HighA batch of substandard regulators was installed on 2012 models, leading to a massive recall. Symptoms include the battery light and check engine light coming on.
Excessive Engine Heat
MediumThe Twin Cam 103 runs lean from the factory to meet emissions, and the catalytic converter in the headpipe traps significant heat near the rider's right leg.
Inner Primary Bearing (IPB) Wear
MediumOften caused by an over-tightened primary chain or high mileage, resulting in a whirring noise when the bike is in neutral with the clutch out.
ABS Module Seizing
HighIf the brake fluid is not flushed every two years, moisture causes corrosion inside the ABS pump, leading to a hard brake lever or total loss of braking power.
Used Buying Inspection Checklist
What to look for when buying a used 2012 Harley-Davidson FLTRX Road Glide Custom.
Compensator Noise
Listen for a metallic 'bang' or 'clunk' when starting the bike; this indicates the compensator is worn or failing.
Rocker Box Leaks
Check the top of the engine for oil misting or seeping, a common issue on Twin Cam engines as gaskets age.
Voltage Output
Use a multimeter to check that the charging system is putting out 14.0-14.4V at 2,000 RPM to ensure the regulator and stator are healthy.
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