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Discussion Starter #1
Hi guys, can I ask for some advice about rough cruising?
I bought the bike a couple of months ago, R1 2011.
The shop was near Manchester and I live in Bristol so it was a bit of a ride home.
After an hour or so I began to notice some roughness/suddenness when opening from a closed throttle.
'Maybe the chain is a bit loose' I thought.
As time went on it got worse and worse, until it was difficult to cruise due to the engine apparently cutting in and out a couple of times a second.
This made it quite dangerous trying to get round roundabouts!
Opening the throttle a bit further made everything go away, but that is a difficult thing to do in heavy traffic...

So, I sent it back to the dealer. They ran it on a dyno and said it was fine (insert $rant about stupid dealer not listening here...)

Eventually they sent it back and it was the same, pretty much ok when cold, but getting dangerous over a long ride.
After further discussions they asked me to change the spark plugs - no point sending it back to them.

On removing the tank I see that the fuel pipe is a bit kinked, so I am now waiting for parts to do the fuel pipe mod.
I am thinking I may replace the spark plugs as well, anyway.

I also got into diagnostic mode, thinking the TPS might be faulty. This is where some advice would be appreciated.
The numbers on the display seem normal, well within range at closed throttle and increasing linearly with throttle opening.
But I noticed that just off idle there is a buzzing noise and something seems to be fighting me. I can't open the throttle smoothly.
I assume it is something to do with the Throttle Servo Motor.
Looking at the workshop manual, as far as I can see the throttle cables only move the TPS, there shouldn't be anything else connected to my hand.
So what is making it stiff? The buzzing noise goes away at (I reckon) the same throttle setting that smooths the engine out when it is running, and from there on the throttle is easy to move.

Does this sound right? Any info appreciated.
 

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Discussion Starter #3
Further progress over the weekend.

It seems my questions about the TPS were a red herring.
The 'graunchiness' was due to the fact that there is a spring between the throttle cables and the end of the throttle butterfly shaft.It seems that at low throttle openings the shaft is vibrating. I assume some wear/ free play is causing feedback between the motor and the position sensor.

Below are two videos, the first is from a couple of years ago, from someone who had the same problem as me:


As you can see the throttles should not be doing that.
The second is my throttles.


At the moment my plan is to change the spark plugs and do the fuel mod. I do not expect this to fix the problem now!
 

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Discussion Starter #5
Sorry, but I don't think this is the same issue. Anyway, the shop I got it from have agreed that the throttle bodies are borked and are sending me a new set. Further updates to follow!
 

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I had a similar problem. I thought it was the TPS since that was an issue with the 2004 and newer R1's. Took it to the dealer and it was the plugs. Replaced them and the bike has been running better than ever!!
 

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Sorry, but I don't think this is the same issue. Anyway, the shop I got it from have agreed that the throttle bodies are borked and are sending me a new set. Further updates to follow!
Have you managed to get throttle bodies replaced now or still waiting?
 

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“Rhinestone Cowboy” MF Doom
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Sorry, but I don't think this is the same issue. Anyway, the shop I got it from have agreed that the throttle bodies are borked and are sending me a new set. Further updates to follow!
What you describe is exactly what I experienced for years. For a long time, I was on a wild goose chase.

Then I had the ECU reflashed and that fixed my issue.

When you’re finish replacing everything on your bike and the issue is still there, give the reflash and try and let them know that your throttle is very abrupt.

@Tad158
 

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Astronomer not Astrologer
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:corn....
 

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Astronomer not Astrologer
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Nothing wrong with the TB in that video. That is exactly how the throttle by wire map is programmed. The buzzing is the servo caught between two steps. Every R1 would do that if they did what you just did.

At zero RPM the throttle table is like 2% at WOT....So yes they won't open.

Put the bike in diagnostic mode and look at the tps value and open the throttle. The butterflies will go to WOT.

What you are complaining about is what everyone complained about worth this generation bike...The throw and fuel mapping sucked from the factory...hence why we flash the bikes ECU...and why a PCV doesn't fix it, because it is fuel AND throttle mapping.
 

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R1.. The fast kind
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Interesting to know this flaw still continues ever since the introduction of ride by wire.... :confused:

My -07 did the same and it drow me bonkers until i got the ECU flashed with YEC firmware.

Got a video of it:

No mater how careful i tried to open the throttle the butterflies made a jump, i,e, it isn't a A/F issue but i guess a remap in the 0-2% area can smooth it out a bit but it's a sick way to manage it.

As other mentioned, a reflash that adress this issue is the way to go (y)
 

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Discussion Starter #14
Well, the 'new' throttle bodies have fixed the problem. She is soooo smooth now! OK so my last bike was a Ducati so my definition of smooth may be slightly out, but hey!

As people say above, there is still a bit of a jump in the throttle position, but to be honest I can't feel it when riding (not yet anyway!) I have to get used to how she rides now, then I may start having opinions on fueling/ throttle position.

I don't think these issues are the same thing, the throttle 'jumping to a position' was there, but it was then vibrating back and forward. there was too much play or wear in something causing a feedback loop. As you can see in the videos, it is a lot more than a 1% change in opening position so I don't think it is just 'between two steps'.

Anyway, it's fixed now and I think I fell in love with it on the test ride.

Time to try to get some miles in before it gets too cold!
 

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Well, the 'new' throttle bodies have fixed the problem. She is soooo smooth now! OK so my last bike was a Ducati so my definition of smooth may be slightly out, but hey!

As people say above, there is still a bit of a jump in the throttle position, but to be honest I can't feel it when riding (not yet anyway!) I have to get used to how she rides now, then I may start having opinions on fueling/ throttle position.

I don't think these issues are the same thing, the throttle 'jumping to a position' was there, but it was then vibrating back and forward. there was too much play or wear in something causing a feedback loop. As you can see in the videos, it is a lot more than a 1% change in opening position so I don't think it is just 'between two steps'.

Anyway, it's fixed now and I think I fell in love with it on the test ride.

Time to try to get some miles in before it gets too cold!
Did you buy new thottle bodies from yamaha / other dealer or did you get 2nd hand ones? or like Ebay ones?
 

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Discussion Starter #16
Did you buy new thottle bodies from yamaha / other dealer or did you get 2nd hand ones? or like Ebay ones?
The throttle bodies were second hand, but the shop bought them. So I don't know where they came from - I assume ebay:confused:
The label says they are from an '09 R1, so I assume they have some miles on them!
 
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