2003 Z1000
42'000kms
K&N Air filter
Air filter box mod
Danmoto slipons
stock tune/ECU.

Fixed an issue the other week with my fuel breather hoses, and since my bike has never ran better, I've been riding the absolute crap out of it. And so now I have a new issue that has me scratching my head.

After a long ride, I went to gun the throttle and instead of surging forward, the bike just bucked and choked. Long story short, I figured out I could fix the problem for a bit, by flipping the kill switch on/off, while the bike was still coasting.

Once I flip the kill switch off, and the bike is "on" again, it instantly has max power. I might even risk saying, an absurd amount of power. Now that I've been riding this issue for a couple days, I've noticed that the power is gradually fading, until it starts to bog in the high rpms. If I continue to ride, the "usable rpm's" get's smaller and smaller, untill it's choking at 5K instead of 8K. Again, restarting the bike results in instant, full power again. have to restart probably every 20 mins of hard riding.

Thoughts? Is my stator going? Is the fuel pump going? Just seems so weird that restarting, or even just flipping the kill switch restores power instantly.

Any advice would be appreciated!

Had the same exact issue. Replacing Fuel pump assembly and fuel line together fixed it for me. I had the EXACT same issue though.

 

2003 Z1000
42'000kms
K&N Air filter
Air filter box mod
Danmoto slipons
stock tune/ECU.

Fixed an issue the other week with my fuel breather hoses, and since my bike has never ran better, I've been riding the absolute crap out of it. And so now I have a new issue that has me scratching my head.

After a long ride, I went to gun the throttle and instead of surging forward, the bike just bucked and choked. Long story short, I figured out I could fix the problem for a bit, by flipping the kill switch on/off, while the bike was still coasting.

Once I flip the kill switch off, and the bike is "on" again, it instantly has max power. I might even risk saying, an absurd amount of power. Now that I've been riding this issue for a couple days, I've noticed that the power is gradually fading, until it starts to bog in the high rpms. If I continue to ride, the "usable rpm's" get's smaller and smaller, untill it's choking at 5K instead of 8K. Again, restarting the bike results in instant, full power again. have to restart probably every 20 mins of hard riding.

Thoughts? Is my stator going? Is the fuel pump going? Just seems so weird that restarting, or even just flipping the kill switch restores power instantly.

Any advice would be appreciated!

It almost as if your fuel filter is plugging off. When it stops the pump, the dirt drops, then eventually plugs off again. If the ignition coils soft core was expanding and shorting coils out, you would have to wait an hour or so for them to cool. On BMW you have to replace the fuel pump. My z1000 is new to me so I'm not sure where the fuel filter is.

 

It definitely was the fuel pump