My 03 hayabusa wont rev over 9000 rpms and it bogs down when given full throttle?

Question

ive check tps sensor spark plugs and air filter

Answer 1

What does the scouter say?

Answer 2

I have a few guesses.. 1- the O2 sensor, its kind of hard to check those unless you have a machine that tests them. When they go bad or get clogged they stop reading any unburned fuel, makes the computer think the bike is running lean so it lays the fuel to it, you can't get enough air to the bike so it bogs like crazy. I am a Yamaha guy, and I know most of the Yami's will give an error code when the O2 sensor goes bad, I don't know about Suzuki though.

My second guess is pretty simple, it very well may be water in the gas, did you just recently fill it up before you started having this problem? You could go out and buy any type of gas treatment that removes water, STP makes a good one. Just read the bottles and make sure it removes water...dump it in and run the bike for a little while.

Which leads me to my 3rd guess... dirty injectors...while you are getting gas treatment that removes water, make sure its something that also cleans the fuel system and injectors... that may fix your problem too.

Run a whole tank through it with the additive...see how the bike runs then. If it is still running bad go get a new O2 sensor and see if that doesn't fix it.

Also, check the boots on your air box and make sure none of them are cracked, I doubt they are given that the bike is only 5 years old, but check them anyway....cracked boots will make a bike do exactly what yours is.

What is the TPS controlling on that bike? The TPS on my Yami controls my EXUP system in the exhaust, does that Busa have some type of air dampner that the TPS is controlling? Like a flap inside the air system?  I have seen that before, but not sure if the Busa has it or not. Check and see if it does, if so... check those cables that control it... it should come full open when the throttle is full open.

Check the ram air vents up by the headlights and make sure you haven't sucked something up, should be screens in there...might have something on one like a piece of plastic... could be bugs clogging them, check it.

Thats all I can think of based on your expanation.

Good luck!!!

Answer 3

sounds like it's not getting either fuel or air, check your throttle bodies and all your fuel lines, make sure your intakes are clear, other than that there's not enough information here to make a more precise diagnosis, it could be anything from what you gave us

Answer 4

what were the events leading up to this problem?

edit: DSF, I don't think he has carbs... ever heard of EFI?

Answer 5

you should wait for it to warm up and if that doesnt work, get your carbs cleaned/rebuilt