Hi guys , I have a concern with my r1 2012 , between 1.5krpm to 6k rpm .
I have jerking throttle , like the bike is missing gas , and this happen through all gear...
I have look if I didn't have a kinked fuel line, everything is fine .
Than I though it might be my k&n filter so I put back my OEM one , the problem still ..
Than I look for my tps sensor in diagnostic mode and the left and right tps are all fine everything is in spec.
So what left ? I though maybe it could be my spark plugs but I only have 11000 km ( 5000 miles)
Or can it be a bad injector ?
This problem only occur at low rpm , over 6k rpm and WOT everything is fine ...
I have talked to a Yamaha mecanian and he think it could be my flashtune map but I dont think so , Im using TAD map and as I read everyone is having good result..
Under load while cruising , at a steady throttle what ever rpm between 2k and 6k , I can see the rpm needle goes up and down and im jumping on the bike back and forth.. like im missing gas , and if Im over 6k no problem..
My bike will do it on the stand slightly, but not on the road/track. I would take it back to your tuner and complain, and see what he sees on the AFR and if he can smooth it out in the fuel map. He should be able to load the bike and hold the throttle at that RPM and see it on the dyno....
I have some kind of "progress" with my trouble. It was getting worse for the last few days...
Now the bike starts and dies immediately. Sometimes it holds ~800ish rpm for a second or two and then dies. I can hold rpm with the throttle and even ride it a bit, but as soon as I let off the throttle it dies. The bike feels slow and sluggish. If I give it more then ~40% gas it falls on its face. I can hear the intake sucking air, but NO power at all, the bike just slows down - no acceleration.
It seems like the throttles are opening, but ECU doesnt know it and uses wrong values from fuel\ignition tables etc. So I've checked TPS ets sensors through diag mode. Nothing.
Checked multiple times. Fuel line modded, impossible to kink.
Stuttering and hesitation were worsening in a few days, but new symptoms came at once, after one of my stops. I went to a shop for a few minutes, came back, tried to start it and got all these symptoms - dies after start, no idle, low power, no power at mid and high throttle.
The switch between "low power possible to ride" and "no power at all, slowing down" definately happen at certain throttle position, but independantly from RPM.
Is there any chance that something is wrong with timing (jumped a tooth etc), Cam or Crank sensors?
I've checked my timing and it turned out that my intake cam was 2 teeth retarded. I've re-set correct timing and bike got back its power and starts fine as always. I've also checked crank, cam and throttle position sensors, coils - everything is fine.
But low-mid RPM low throttle hesitation is still present.
That gave me an idea that old CCT (as mine) could affect timing in low RPM due to lower oil pressure at that RPM. Timing fluctuation could cause any type of hesitation. Correct me if I'm I wrong.
We dont have any kind of mechanical CT available in stock in any of local shops, so I have to order one. But that would take a lot of time. So I will probably try to buy\make a DIY mechanical CT, to eliminate that problem.
When you do this, look closely at your torque curve from approximately 3500rpm to 6000rpm. See if there is a noticeable dip in the torque curve in that rpm range. All the dyno graphs I've seen for the crossplane seem to have this.
My theory is this (and it's only a theory. I have no proof). I don't have a lot of surging, but I do have a very noticeable lack of power in that rpm range. I'm thinking it has to do with the fly-by-wire throttle mapping since the throttle cables run to a servo and the servo is what opens the throttle bodies. For instance, if you twist the throttle 15%, the throttle bodies may only 10% until the revs reach 6000rpm due to the fly-by-wire mapping. Then once you get to 6000rpm, the throttle mapping changes and that's what causes the sudden jump in revs. In the area where I live, there are many roads that have long uphill grades and it's very noticeable when accelerating in 1st, 2nd and 3rd gear.
I believe some riders don't notice this as much because of their riding style. If you accelerate at a more rapid pace, the the motor tends to rev faster in the lower rpm's. If you shift at say 10,000rpm, then the revs will stay above 6000rpm and this does not occur. Next time you're riding, accelerate fast from a stop, then accelerate at a normal pace and shift at a lower rpm and you'll see a difference (or at least I do).
Again, this is just my theory and I have no proof. :dunno
my throttle bodies will not sync at all. sync'd them yesterday and rode it for about 45minutes only for it to start stalling and the idle fluctuating again. Jerking is still there too! this is a real drag for me!
Sorry to bring back my thread , but I have a question , I recently had a code that appeared on my screen code 59 and 15 . ( tps sensor)
And here is what I found , I tested my sensor everything was in spec , with the ohmmeter and in diag mode .
But when I skinned the plastic rubber that cover the wire to the sensor here is what I found. A skinned wire ... someone know if it's only a ground or I leave it like that or it's suposed to be welded to a ground wire ?
He can try to calibrate them , he go in diag mode and play with the angle of the sensor and once he get the spec reading he's looking for he tight the screw in place.
Just to let you know I finally found my problen . It was my tps sensor doing the jerking between 3k and 6k rpm on all gear.
I tested the tps sensor resistance and it was good , so if any of you encounter this problem change the tps.
And one more question Im having difficulty to start my r1 , I can heard the stator doing weird noise , like it's gripping . What you guys recommend ? Rebuild the stator ? Can I buy a bigger one or there isn't any ?
And should I check the rectifier ? Let me know what you think
Thank you very much Carl
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