Adjusting the throttle sensor

I have been adjusting the TPS with TuneECU but things aren't going as I planned to.
When I set the TPS between 0.55V in neutral position, the full throttle position sets 3.62 v instead of the wanted 3.8V
In full throttle it also monitored 93% instead of 100%

Need I adjust the throttle cable or do something else?

I've done the measurements with only the ignition on.

When the engine is cold... Set full throttle to 3.8v and do not worry about the tps percentage... When warm it will sit at around .65v... Then do 15 min reset. Worked a charm for smootheness for me

F*CK The engine doesn't run idle with normal RPM's
when I start the engine for 5 seconds the rpm swaps around 3000 - 4000, like someone is jerking the throttle. After the 5 seconds it runs normally idle but when I open the throttle and hold it for a few seconds the whole progress starts over!!

I did a 15 min. reset (with the same problem), but didn't result the problem

Please help!?

Yes the revs will sit high for a while but will drop off... 15Min reset fixes this... In a weeks time ecu will know what is doing from normal riding... Neutral changes can be done but only when at operating temp... I would leave it alone and let the self learning reset do its job. If the tps voltage is too high u will know about it at idle as it will stall every time u lift off the throttle... What u want is the smooth transition from on and off throttle responce.

U will never get 100% tps without stalling issues unfortunately but I do get 98 to 97% and is silky smooth

thanks guys!
I will start the whole procedure all over. Set the tps at 3.8V when the engine is cold and do a 15 min. reset.

One question though. Does the engine needs to run when setting the tps?

Only if u want for the neutral reading... But not the one when cold... For what its worth.. I disconnected my head light fuse when I did that

Yeah!! Finally!
I guess a night rest resolved the problem

Now I know what you mean MrZ32 by 'Silky smooth'. No more annoying traffic rides, just pure easiness en almost no engine brake. Although I'm going set the tps a little lower for my kind of taste. Now when I leave the throttle the rpm drops only till 3000, so I can ride 44 km/h for ages. What's your advice, 3.7V or 3.75V?

just give the bike a week or so mate... it settles down more from being too silky smooth.

but if you were to change it just bump the cold reading up a lil (more than 3.8v)... the idle speed controller kicks in when voltage drops... it is getting the transition just right.

but leave it for a week and it will learn... it did for me

I've lowered the tps to 3.72V, did a reset and now it's just perfect! The rpm slowly drops, also under 3000, and the engine doesn't shut down after 30 sec in idle, what it did with 3.78V.
What a fantastic bike do we have, now even better then it was!

Does balancing the throttle bodies interfere with the setting of the TPS ? Just wondering as I'm planning on doing both soon and it would be easier if I could set the TPS first (cold engine) and then sync the bodies (running engine) , would save me the wait till the engine is cold again

yep, just set it to 3.8V cold (full throttle) then do the throttle balance.

I've set the voltage to 3.79v full throttle (cold engine) and did the 15 min reset more than once already. Been riding it for a week now and it keeps cutting out when slowing to a stop, just when I pull the clutch.
It also idles way too low. Running on shade's map with otto timing

Any ideas?

Tried setting the tps to 3.75 today, but this made no difference at all to how the bike rides. This should make a difference right? It is the front cylinder tps you set right? Seeing as that is the only ones voltage you can read in tuneecu. seems I let in a serious electrical gremlin

You have turned the O2 sensors off with tuneecu, right? Still no difference?

Yep, the o2 sensors are indeed off. Just rode it again a few minutes ago. Seems that some stuff changed over night. Now it's as if the throttle stays partially open, it just keeps trotting on at 2k-3k rpm. Can't make heads or tails of this thing.
Anyways, I've ordered some dielectric grease from the US (impossible to get over here in Belgium) and will be packing the BGC again when it arrives. I'll also check the throttle cable play. After that it's going in for a custom tune over at the place Bert went to, hopefully by then it won't be so unpredictable anymore.

@MrZ32, is it possible the correct voltage is different for the SDR vs. the regular SD ?

The TPS is really sensitive and I suggest you touch it only when you really have to!
Also mark it or write down the settings so you can put it back where it was BEFORE undoing the screw!
Just to give an example how sensitive it is, doing up the screw can trow it off....

Another tip: read the engine repair manual for your bike (download from how to section) and check the recommended voltage settings.

The SD runs shit if the TPS is set wrongly, I'm sure that is the only problem you have.
On some bikes don't try to aim for 100% open but instead make sure it is fully closed with the engine hot and throttle closed, aim for the recommended closed throttle voltage if you use a volt meter.

If the bike cuts out or idles funny it's off!

If you adjust TPS at full throttle what will be the reading at closed throttle? It think that it is possible to adjust the map so that the closed and small throttle open positions will be smoother. If you change map for low rpm it will change the mixture for certain rpm, if you adjust tps it will change the mixture for the entire throttle range and you need dyno later.

@ktmguy
I've always double checked the values after fastening the screw.
The thing that bugs me, and also the reason I think it's something else than the tps setting, is that the behaviour changes over night without me changing anything.
For example: I set the voltage to 3.75v friday evening. It runs fine in the garage at that time.
Saturday morning I take it out for a spin, it idles on very low rpms, causing it to stall out when I pull the clutch while rolling to a stop.
Sunday I go four another drive, this time it idles high, causing it to keep trotting on at 2k-3k rpm.
Today I take it to work and it went back to saturdays behaviour.
It's really strange. Can't make heads or tails of it.

was it doing this before you adjusted the tps?

and i will let you know what voltage mine is cold and hot tomorrow... might help you guys out. but i am thinking that there is differences between individual bikes

It didn't do that before I changed the tps no. I did install motobox at the time I changed the TPS voltage, so I also had the BGC disconnected, that's why I'm not jumping to any conclusions until my newly ordered dielectric grease is in and I had a chance to clean and repack the BGC.

Still knocking on wood, but I think I might have found the issue. There was way too much play in the throttle cable. Just retightened it and on the initial ride, I had no more stalls.
Now when it kept going on at 2k-3k rpm, could this also be because of the ECU trying to (over)compensate for the slack in the throttle cable and subsequently the throttle bodies being closed too far ?

So sometimes it wants to rev too high and sometimes stall? I guess if the throttle bodies were able vibrate around due to loose cables its possible but not likely. Can you check the resistence in tuneecu of the idle speed controller.. From memory it should be reading 25ohms... Check the PDF that Klink hosted for me in the how to do it section.

will sleep over what you could upset when installing motobox.

Will check the resistance tomorrow and update in this post.

Haven't had a chance to check yet. Bert_be's dyno guy had an opening so I dropped it of over there today. Should have it back on Saturday. He will set the TPS, balance them and set everything right. It was definately running way too rich on Shade's map, had black spots all over the SDR's fine white ass

Better make this a sticky I guess?
Lot of problems on 990 and 1190 engines seems to be TPS related.
Certainly worth reading this topic if described symptoms appear.

I'm having the same problems and have practically destroyed the BGC from repeated cleanings with no result.

Tomorrow I have a date with my TB's...hopefully I'll get lucky.

i am a tad confused, sorry for my ignorance.

attached to computer and have open tune ecu
bike on but not running

in diagnostics screen TPS meter (bottom of the 3 gauges) shows .80V. i believe you guys are saying to set it to 3.8v

can someone please advise me how to do this as my throttle is just too choppy and not fun to ride bike.

thank you.