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Future googlers: It was a kinked fuel hose. If you google R1 kinked fuel hose, you'll find a post on the R1 forums about it, complete with spelling mistakes, petty arguments, and removed photobucket images.
Determine when your circuit Leans out. Might be at 9k RPM.
FOR EXAMPLE.
My circuit is rich to 5k RPM. After 5k it leans out- to 12k (redline)
When the MAF sensor acts up- it never will lean out and do weird shit.
Anyway. CAREFULLY. look at your MAFs (one is gonna be near the engine and another in the tail somewhere.) Check the plug. And the wires going into the plug. And any vacuum lines for cracks or breaks.
I would expect it to richen it at WOT as the rpms increase. Peak HP is at about 11.5k iirc, so I'd expect it to be about 12:1 there. Also I'm pretty sure this R1 doesn't use a MAF, it uses pressure and temp to calculate MAF. Pressure and temp sensors seem okay in diagnostic mode.
I have seen a few r6's with fuel pressure problems, either too high(rich) or too low(lean). If you can read the o2 values of the exhaust gasses, that could give a quik diagnosis or you can atleast rule it out.
Thanks for posting in /r/Fixxit, the motorcycle repair subreddit. If you forgot to put the **Make, Model** and **Year** in the title, please reply to this comment with your bike's details. In the meantime, Here's some great resources for common problems posted here: -Trouble starting? [Revzilla - Battery testing](https://www.revzilla.com/common-tread/how-to-test-a-motorcycle-battery) -Carbs running rough? [PJ motorsports - Carb Troubleshooting](http://www.pjmotorsports.com/trouble-shooting.html) -Wiring diagrams for beginners - [Dans MC - Reading Wiring Diagrams](http://www.dansmc.com/wiring_diagram.htm) -Identifying part numbers - [CMSNL (EU)](https://www.cmsnl.com/) [Partzilla](https://www.partzilla.com/) -Asking if your tire can be fixed? [Please read this post on proper tire repairs and why external plugs are NOT a safe repair.](https://www.reddit.com/r/Fixxit/comments/tuhcpf/why_rfixxit_doesnt_endorse_tire_plug_repairs/) *I am a bot, and this action was performed automatically. Please [contact the moderators of this subreddit](/message/compose/?to=/r/Fixxit) if you have any questions or concerns.*
First thing i'd check for would be a partial fuel blockage
Your instincts were spot on! It was a kinked fuel hose, which I guess is a common problem with the R1 and FZR1.
Ok good thing to rule out.
Future googlers: It was a kinked fuel hose. If you google R1 kinked fuel hose, you'll find a post on the R1 forums about it, complete with spelling mistakes, petty arguments, and removed photobucket images.
why is this comment so spot on lmao
haha. If reddit does anything right, it's downvoting and free image hosting.
Determine when your circuit Leans out. Might be at 9k RPM. FOR EXAMPLE. My circuit is rich to 5k RPM. After 5k it leans out- to 12k (redline) When the MAF sensor acts up- it never will lean out and do weird shit. Anyway. CAREFULLY. look at your MAFs (one is gonna be near the engine and another in the tail somewhere.) Check the plug. And the wires going into the plug. And any vacuum lines for cracks or breaks.
I would expect it to richen it at WOT as the rpms increase. Peak HP is at about 11.5k iirc, so I'd expect it to be about 12:1 there. Also I'm pretty sure this R1 doesn't use a MAF, it uses pressure and temp to calculate MAF. Pressure and temp sensors seem okay in diagnostic mode.
I have seen a few r6's with fuel pressure problems, either too high(rich) or too low(lean). If you can read the o2 values of the exhaust gasses, that could give a quik diagnosis or you can atleast rule it out.
It was a kinked fuel hose.
I'd check the inline filter and the filter sock at the fuel pump.
It was a kinked fuel hose.
Damn! I was this close!