05 zx10r Very Weak High End Power

NRPostma said:

Hey guys, to keep this simple for you. This is what my bike is doing. Any help is appreciated. Bike has 30k miles
My bike has good power up to 6-7k RPM depending on the gear. After that, acceleration dips and the bike slowly goes up the RPM's. It will pretty much bog its way to 10k RPM...it wont even reach 10k RPM in the higher gears. The bike will rev good in neutral and if I pull the clutch in. The bike has inconsistent weak fluctuating power after 7k rpm. I do not notice any running issues before 6k rpm

Scenario: Im bogging in 1st gear around 8k rpm, I pull the clutch in, the bike fully revs, I release the clutch, and the rpm bogs/sinks back down to around 8k.

Tell me what you think could solve this.
My research pointed me too one of these things
1. Spark plugs (bought bike used last year, no idea how long since they have been changed)
2. Air Filter (looks dirty)
3. Fuel Pump
4. Clogged Injectors
5. Tip over switch may be faulty
6. Secondary butterflies may be faulty (can I remove them?)
7. Throttle bodies may be messed up. (I took my bike apart this winter and accidentally adjusted the throttle cables in front of the engine, could this cause less fuel to enter?)
8. I had a faulty power commander that wasn't letting the bike start, I ripped it out and the bike started easily
9. ECU, or rectifier issue
10. A simple tune

Thanks again :biggrin:

Click to expand...

1 faulty plugs will give you misfire, it doesn't feel like bog, it feels like a cut out. I don't think that's the problem, but it wouldn't hurt to change them. First thing I do when I buy a motorcycle is change oil/spark plugs/check valve clearance.
2 Dirty filter should be changed before the motorcycle starts running bad:lol:
3 Fuel pump where I'd look first, bogging at higher rpm is usually a fuel related issue, lack of fuel that is.
4 clogged fuel injectors would cause problems at idle and and low and high load. Probably not the issue, but sending 12 year old injectors to get cleaned and flowed is fairly cheap. I get mine cleaned every year, cause I like my bike running its best.
5 tip over sensor either on or off..............so probably not the problem
6 when secondaries fail........you get an fi light, do you have one? They can be removed.
7 Sync the throttle bodies, or take it to a shop to get it done, I really don't know how you can mess up throttle bodies, clueless on that.
8 Power commanders belong in the trash.
9 Ecus last a long time, and when they fail, they fail........engine stops lol. Rect is part of your charging system, if it goes bad, your bike runs till it drains your battery............basically.
10 Simple tune? Tunes don't fix mechanical issues and lack of maintenance. I'd work on making sure that your bike is in good working order.........aka gets enough fuel..........before you mess with "simple" tunes.