2004 Yamaha FZ6 problems & reliability
34 owner complaints filed with NHTSA for the 2004 Yamaha FZ6. Last verified Aug 7, 2026. Complaints are unverified reports submitted by owners to the federal Office of Defects Investigation.
Each complaint is counted once (by NHTSA case number), even when it names several vehicles.
6 complaints report injuries (104 injured, 99 deaths reported).
Federal crash records (FARS 2020–2023): 2004 Yamaha FZ6 vehicles were involved in 1 fatal crash with 1 occupant death. Involvement counts are not adjusted for how many are on the road and do not imply fault or a vehicle defect.
Most reported problems
| Component | Complaints | Share |
|---|---|---|
| Fuel System, Gasoline → | 15 | 44% |
| Electrical System | 6 | 18% |
| Fuel System, Other | 6 | 18% |
| Vehicle Speed Control | 6 | 18% |
| Engine and Engine Cooling | 2 | 6% |
| Power Train | 1 | 3% |
| Unknown OR Other | 1 | 3% |
Component groups as classified by NHTSA. A complaint can name more than one component, so shares may sum to more than 100%.
Common symptoms owners describe
Keyword analysis of complaint narratives; one complaint can describe several symptoms.
Mileage when problems occurred
Among the 28 complaints that included a usable odometer reading, the median reported incident mileage was 7,300 miles (middle 50% between 4,975 and 9,113 miles).
Complaints by incident year
What owners report
“Front drive shaft, chain sprocket ‘Nut/lock washer’ has came loose and fell off on the highway. Could have locked the chain around the wheel and cause a major crash, also could have severely damaged the engine casing. It damaged the rear swing arm and a piece piece near the stater. I replaced the nut & locking washer…”
Power Train · filed Feb 10, 2023
“Yamaha 2004 fz6 bike runs good for a while, and all the sudden the engine loses 90 % of its power, I have to turn the key off, then back on to regain power while in traffic, one time this happen I gave it to much gas to get out of traffic ,and I flipped the bike over in the middle of the street. It was my lucky day…”
Electrical System · filed Oct 1, 2006
“Motorcycle shuts off after reducing throttle during deceleration and during shifting. Many riders of the same model motorcycle have reported the same problem. This is dangerous because the bike is w/o power and sometimes during downshifting the rear tire loses traction and causes the bike to slide sideways. *nm”
Engine and Engine Cooling · filed Jul 5, 2006
Verbatim excerpts from complaints filed with NHTSA. Reports are not independently verified.
Federal defect investigations
- MOTORCYCLE STALLING
Preliminary Evaluation PE06020 · opened May 23, 2006 · closed Oct 5, 2006 · led to recall 06V371000
Technical service bulletins
4 manufacturer communications (TSBs, service campaigns, warranty extensions) are on file with NHTSA for the 2004 Yamaha FZ6.
Unstable engine idling. *tt
2006011 · Service Bulletin/Repair Instructions · issued Jul 26, 2006
Drive sprocket retaining nut and lock washer replacement. *tt
200603 · Service Bulletin/Repair Instructions · issued Feb 24, 2006
Service manual corrections - crankshaft journal bearing colors. *nm
2005020 · Service Bulletin/Repair Instructions · issued Nov 30, 2005
Service manual additions - fuel hose connector information. *tt
2005007 · Service Bulletin/Repair Instructions · issued Mar 31, 2005
TSBs are repair guidance manufacturers send to dealers — they are not recalls and repairs are not automatically free. Full documents are available on NHTSA’s site.
Safety recalls
No NHTSA recall campaigns name the 2004 Yamaha FZ6 in our current data. Recalls may apply only to certain VIN ranges — always confirm with a VIN check.
Check whether your specific vehicle is affected
Recall campaigns often cover only certain VIN ranges. Enter your VIN on the official NHTSA site to confirm whether your vehicle is included and whether the repair is still open.
Check VIN on NHTSA →Buying a used 2004 Yamaha FZ6?
- · Decode the seller’s VIN with our free VIN decoder to confirm the exact year, engine and trim.
- · Check for unrepaired recalls by VIN on NHTSA’s official lookup — recall repairs are free.
- · Owners most often reported problems around 7,300 miles — worth a pre-purchase inspection if the car is near that mileage.