The motorcycle stalled repeatedly in highway traffic.
2004 Yamaha FZ6 fuel system complaints
Page 2 of 2: complaints 11 to 21 of 21, newest first, as owners wrote them.
Engine hesitation, missing at highway speeds, engine shuts off with no throttle. This is a known issue with yamaha as tps failure on the fz6.
I was returning home to plano, tx from a weekend trip to colorado. I was about an hour away from home, when I started to experience engine hesitation whenever I released and reapplied the throttle. The next day, the hesitation was gone, but I noticed that my fuel mileage had gone way down (formerly 42-45 mpg to the current 35 mpg). The engine is also running rich, enough that I can smell unburnt fuel in the exhaust. The engine also has started to idle erratically, fluctuating in rpms.
Throttle "jumps" unexpectedly during normal operations of the motorcycle. When traveling speed will decrease and the engine will "sputter", then the engine will jump back to speed causing a jolt forward. Sympotms best described and the fuel being cut off then on again.
2004 yamaha fz6 13k+ miles. During a sustained cruise, with a sustained RPM between 4k and 5k RPM, the engine began faltering/bogging down and running very rough. Accompanying this issue, there is a marked sense of deceleration unless more throttle is applied to compensate for the the loss of power; the deceleration, at times, can be quite sudden. This problem tends to occur beyond 1/2 hour of operation. If downshifting or upshifting is performed during the engine faltering, the result is a stalled out engine unless shifting is performed very quickly. Stalling out while downshifting for a full stop at an intersection gets dicey given the amount of oil/water usually found at stop lines and their approaches. Turned bike into dealership, reporting the above symptoms along with reports of throttle position sensor problems reported by other fz6 riders. Dealer could not replicate the problem and simply replaced the spark plugs. Upon receiving the bike back from the dealership, the problem promptly returned about 40 minutes into the first ride.
At about 6200 miles while pulling up to a light of a steady run my motorcycle would die. Restart it, and it would be misfire real badly and die again. Take key out and back in it would fire up just fine, for the time being. First time this happened I was about to take a turn, had the clutch in down shift, then braked for an oncoming car, as I started to lean I was letting the clutch out, when low and behold the engine died. So it just locked up. Luckily, I was able to get that clutch in before it went over. Took it to the dealer and they had it a couple days and said there were no codes, and they could not duplicate the complaint. It acted up when ever it felt like. Sometimes it ran fine for weeks, then sometimes it messes up a bunch in 1 week. I've researched this topic online, and found many others with same problem.
My motorcycle will stall and/or run rough occasionally, and not idle without additional throttle input. If I turn the ignition off and restart the motorcycle it will fix the problem for a period of time. I am very concerned that the motorcycle will encounter this problem while turning and causing instability that might contribute to a crash. In addition, I do not like having the thought of this problem in my mind everytime I am riding, as it takes enough concentration to avoid other vehicles and monitor road conditions. I have not repaired the problem yet. Thank you for your time.
Throttle position sensor issue well documented on http://forums.sportbikes.net/forums...088#post1774088 stalling on freeway, could cause accident. Has not been fixed by yamaha.
1) at approximately 8000 miles on the odometer, my yamaha fz6 began exhibiting periodic stalling. When under normal power, the bike exhibited a moderate loss of power, with a complete engine stall once the clutch was disengaged (while stopping in traffic or parking). These symptoms increased in frequency until it was happening several times per day. 2) the consequences of the failure were generally minimal, with the exception of stalling in stop-and-go traffic. On more than one occasion, the stalling prevented me from moving when traffic ahead of me began moving, placing me in a vulnerable position until the ignition was cycled and the bike started again. Simply pressing the start button would not successfully restart the bike. 3) the problem was corrected by the dealer replacing the throttle position sensor (tps). I had read several reports of other fz6 owners correcting the problem by replacing the tps, and had a tps fault code logged in the computer. The dealer had not heard of any issue from yamaha at that point, and attempted to clean and reseat the connections to the tps first. The problem persisted until replacement of the tps. The old part is not available.
Idle suddenly gets rough then engine quits/stalls at random times, most often at low speed after downshifting, but has happened at highway speeds on parkway in traffic. I'm involved with an online users group of fz6 owners (about 100-150 in the group) and about 20 - 25 people have had to get the throttle position sensor (tps) replaced to correct the problem. (within the 1st year of ownership) I believe my bike is starting to exhibit some of the same characteristics they all had and feel yamaha should look into this for a recall before someone does indeed get hurt or killed if the bike stalls out while on the highway or any other road.
1-average usage, 2-motorcycles would stall sporadically, rpms would vary considerably, a lot of hesitation, variable idling, bad gas consumption. A failure of the motorcycle to cease throttle operations through mid-corner during a turn would inevitably cause the motorcycle and its rider to lose traction at the rear wheels. Further consequences would be death to the rider in extreme, but highly likely circumstances. 3-there was a defective throttle positioning sensor with the 2004-2005 yamaha fz6 motorcycles. Yamaha has so far failed to announce a recall of this defective equipment which can be very dangerous. Quite a few fz6 owners have noticed this failure so it obviously is not a 'one in a million' condition. Please help the fz6 community out by alleviating this worry. Thank you for your time.
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