Tap a category to read its complaints. One report may name several components.
When problems were reported
Mileage at the reported incident
Limited mileage data: 5 of 7 reports include usable mileage. There isn’t enough coverage to show a useful chart.
NHTSA’s mileage field refers to the reported incident, not necessarily the filing date. This shows report counts, not the likelihood of a failure.
What to inspect
Issues worth paying extra attention to based on owner reports.
Electrical System. Review the 3 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
Power Train. Review the 2 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
Exterior Lighting. Review the 1 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
NHTSA owner reports · September 18, 2026 snapshot.
0 crash reports0 fire reports0 injury reports
What owners actually said
7 reports
5,345 miles · Jun 5, 2008
Electrical System
THE 2004 BIG DOG CHOPPER I WAS OPERATING ELECTRICALLY SHUT DOWN WHILE I WAS TRAVELING ON THE INTERSTATE AT 70 MPH NEARLY CAUSING ME TO CRASH IN TRAFFIC. I CALLED THE MANUFACTURER AND WAS TOLD THE ELECTRONIC HARNESS CONTROL MODULE NEEDED DIELETRIC GREASE IN THE CONNECTOR TO KEEP WATER FROM SHORTING IT OUT. I APPLIED THEIR FIX AND…
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THE 2004 BIG DOG CHOPPER I WAS OPERATING ELECTRICALLY SHUT DOWN WHILE I WAS TRAVELING ON THE INTERSTATE AT 70 MPH NEARLY CAUSING ME TO CRASH IN TRAFFIC. I CALLED THE MANUFACTURER AND WAS TOLD THE ELECTRONIC HARNESS CONTROL MODULE NEEDED DIELETRIC GREASE IN THE CONNECTOR TO KEEP WATER FROM SHORTING IT OUT. I APPLIED THEIR FIX AND THE UNIT STILL DOES NOT FUNCTION. I HAD TO PURCHASE THE 2007 UNIT FOR 641.99 DOLLARS. AFTER RESEARCHING THE MATTER, I DISCOVERED THERE WAS A RECALL ON THE 2005 AND 2006 MODELS BUT NOT THE 2004. THE 2004 MODEL IS EXPERIENCING THE SAME MALFUNCTION THAT THE 2005 AND 2006 MODELS ARE EXPERIENCING. I RESEARCHED FURTHER AND FOUND NUMEROUS COMPLAINTS ON THE INTERNET OF OWNERS WITH THE 2004 MODEL EXPERIENCING THE SAME EXACT PROBLEM. THE PART IS DEFECTIVE AND IS A MAJOR SAFETY HAZARD TO ANYONE WHO RIDES THIS MOTORCYCLE WITH THE OLD EHC MODULE, A RECALL NEEDS TO BE MADE ON THE 2004 MODELS OF BIG DOG MOTORCYCLES. *TR
NHTSA ODI #10229998
800 miles · Nov 14, 2007
Power Train
RECURRING SQUEAKS FROM DRIVE BELT. 4 TRIPS TO THE 1ST DEALER FOR ADJUSTMENT UNTIL REAR PULLEY WAS REPLACED BY 2ND DEALER DUE TO INCOMPATIBILITY WITH BELT. SQUEAK CONTINUED AFTER 3 ADDITIONAL TRIPS TO 2ND DEALER. MFG FELT THAT BELT SHOULD BE REPLACED BUT WOULD NOT COVER UNDER WARRANTY BECAUSE BELT WAS CONSIDERED A WEAR ITEM. WITH…
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RECURRING SQUEAKS FROM DRIVE BELT. 4 TRIPS TO THE 1ST DEALER FOR ADJUSTMENT UNTIL REAR PULLEY WAS REPLACED BY 2ND DEALER DUE TO INCOMPATIBILITY WITH BELT. SQUEAK CONTINUED AFTER 3 ADDITIONAL TRIPS TO 2ND DEALER. MFG FELT THAT BELT SHOULD BE REPLACED BUT WOULD NOT COVER UNDER WARRANTY BECAUSE BELT WAS CONSIDERED A WEAR ITEM. WITH LESS THAN 3000 ORIGINAL MILES MFG FINALLY AGREED THAT BELT WEAR WAS PREMATURE DUE TO INCOMPATIBILITY WITH PULLEY AND REPLACED BELT WITH A DIFFERENT TYPE TO FINALLY RESOLVE PROBLEM. *TR
NHTSA ODI #10208969
11,000 miles · Oct 21, 2007
Electrical System
1) SIGNAL LIGHTS QUIT WORKING,THEN HEADLIGHT BLEW OUT, THEN SPEEDOMETER QUIT WORKING, THEN ALL ELECTRICAL WENT OUT AND BIKE WILL NOT START AND ALL ELECTRICAL IS OUT. 3) CALLED BIGDOG MOTORCYCLE DEALER. WAS TOLD THE 2004 EHC MODULE HAS BEEN DISCONTINUED AND MUST UP GRADE TO AN 07 WITH HARNESS. COST DIFFERENCE $202.00 FOR 2004 …
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1) SIGNAL LIGHTS QUIT WORKING,THEN HEADLIGHT BLEW OUT, THEN SPEEDOMETER QUIT WORKING, THEN ALL ELECTRICAL WENT OUT AND BIKE WILL NOT START AND ALL ELECTRICAL IS OUT. 3) CALLED BIGDOG MOTORCYCLE DEALER. WAS TOLD THE 2004 EHC MODULE HAS BEEN DISCONTINUED AND MUST UP GRADE TO AN 07 WITH HARNESS. COST DIFFERENCE $202.00 FOR 2004 AND 650.00 FOR AN 2007 MODULE. *TR
NHTSA ODI #10206475
12,000 miles · Aug 1, 2007
Electrical System
2004 BIG DOG MOTORCYCLE. MOTORCYCLE KEEPS LOSING ALL ELECTRICAL POWER WHEN RIDING ON THE INTERSTATE DUE TO AN INHERENTLY DEFECTIVE ELECTRONIC HARNESS CONTROLLER. THIS SAME EHC HAD BEEN RECALLED IN 2005 AND 2006 FOR THE SAME PROBLEM. THERE WAS NO CRASH BUT I HIT CONSTRUCTION CONES AND ALMOST CRASHED TRYING TO GET OFF THE HIGHWAY …
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2004 BIG DOG MOTORCYCLE. MOTORCYCLE KEEPS LOSING ALL ELECTRICAL POWER WHEN RIDING ON THE INTERSTATE DUE TO AN INHERENTLY DEFECTIVE ELECTRONIC HARNESS CONTROLLER. THIS SAME EHC HAD BEEN RECALLED IN 2005 AND 2006 FOR THE SAME PROBLEM. THERE WAS NO CRASH BUT I HIT CONSTRUCTION CONES AND ALMOST CRASHED TRYING TO GET OFF THE HIGHWAY AND OUT OF THE WAY OF TRAFFIC. *JB
NHTSA ODI #10198224
50 miles · Feb 16, 2005
Exterior Lighting
WHILE DRIVING IN RAINY WEATHER THE MOTORCYCLE'S TURN SIGNAL ENGAGED WITHOUT WARNING. DEALER WAS FULLY AWARE OF THE PROBLEM, AND STATED THAT THE TURN SIGNAL SHORTED OUT BECAUSE WATER RAN DOWN THE COIL WIRE. *AK
NHTSA ODI #10111604
Mileage unknown · Jan 13, 2005
Power Train
WHILE RIDING, THE CONSUMER NOTICED A RETCHING SOUND COMING FROM THE TRANSMISSION AREA WHICH TOOK PLACE OF THE POWER BEING TRANSFERRED TO REAR WHEEL DURING ACCELERATION. *BF THE DEALER TIGHTENED THE BELT ON SEVERAL OCCASIONS IN THE FIRST MONTH OF OWNERSHIP, BUT THIS DID NOT CORRECT THE PROBLEM. *SC
NHTSA ODI #10109462
Mileage unknown · Jan 7, 2005
Service Brakes, Hydraulic
CONSUMER RECEIVED NHTSA RECALL 04V137000 CONCERNING REAR MASTER CYLINDER PISTOL. AFTER HAVING THE REAR MASTER CYLINDER PISTOL REPLACED THE REAR BRAKES FAILED. WHILE APPLYING THE BRAKE PEDAL CONSUMER HEARD A LOUD KNOCKING NOISE AND THE VEHICLE FAILED TO STOP COMPLETELY. VEHICLE WAS TAKEN BACK TO THE DEALER FOR INSPECTION,…
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CONSUMER RECEIVED NHTSA RECALL 04V137000 CONCERNING REAR MASTER CYLINDER PISTOL. AFTER HAVING THE REAR MASTER CYLINDER PISTOL REPLACED THE REAR BRAKES FAILED. WHILE APPLYING THE BRAKE PEDAL CONSUMER HEARD A LOUD KNOCKING NOISE AND THE VEHICLE FAILED TO STOP COMPLETELY. VEHICLE WAS TAKEN BACK TO THE DEALER FOR INSPECTION, BUT MECHANIC MECHANIC COULD NOT DUPLICATE THE PROBLEM. *AK
ON CERTAIN MOTORCYCLES, THE PISTON IN THE REAR MASTER CYLINDER MAY HAVE BEEN IMPROPERLY SIZED, WHICH COULD CAUSE THE REAR BRAKES TO DRAG OR LOCKUP.
Consequence & remedy
Consequence: THIS COULD RESULT IN A CRASH.
Remedy: DEALERS WILL REMOVE THE PISTON FROM THE REAR MASTER CYLINDER AND REPLACE IT WITH A NEW PISTON. OWNER NOTIFICATION BEGAN ON APRIL 12, 2004. OWNERS SHOULD CONTACT BIG DOG AT 1-316-267-9121.