Jerking at low revs/speeds

[Fieldmouse]

I'd definitely checking throttle body balance and then re calibrating the TPS.

Good luck

Hey Froudy,

Checked TPS, and can't get it lower than 1.4. Is there any use balancing throttle bodies if TPS is out? Do I need new sensor? Got same reading from two multimeters.
Maybe a redhead match will solve the issue 🤬

[KiwiCol]

There are a few bikes out there with TPS that just won't go to 1100 & they run fine.  I had 1, figured it was crook so bought a new one $168 from memory & it gave the exact same reading as the one I took off!  So I now have a spare TPS & the bike runs fine (by me) with the original one.

Moral here, don't think your TPS is bung if you can't get it to 1100ohm, I think it's more to do with the difference between high & low readings, but that could be way wrong, just my assumption.

[Fieldmouse]

There are a few bikes out there with TPS that just won't go to 1100 & they run fine.  I had 1, figured it was crook so bought a new one $168 from memory & it gave the exact same reading as the one I took off!  So I now have a spare TPS & the bike runs fine (by me) with the original one.

Moral here, don't think your TPS is bung if you can't get it to 1100ohm, I think it's more to do with the difference between high & low readings, but that could be way wrong, just my assumption.

Yes Col,
I've read your thread and the issues you've had, so I'm a bit reluctant to buy one just yet. Lifting my idle to 1100 instead of 1000 made a huge difference. Can only just feel the bike playing up. Might leave it like this for a bit and 🤞my fingers. It's tolerable 👍

[Eric GSX1400K3]

It also depends on at which connector you check resistance at. If at the main connector, the ohms will be higher as there is more inline resitance. At the actual connector for the TPS, plus with your battery  being fully charged, youve  got  the best chance of getting the right reading.  Also check that your throttle valves have full range of motion. 

[Fieldmouse]

Righto,
Glad to say, problem has been eliminated. If you've followed my journey, you've seen what I've done. Today, to add to it all, I tightened all throttle body intake clips, some had quite a bit of adjustment.
I also adjusted throttle cables, and I certainly believe now this is where the problem was. Must've been too much free play. I've taken it to around two millimeters of free play, and the bike is just completely different. Absolutely no jerkiness at all now!!!

Thank you all for your input, even the jokes that frustrated me even more, as I thought to myself "well your bike must run fine", when my heap of 💩 doesn't!

I will return to the quiet corner of the forum. Thank you all 👍👍👍

[grog]

Good, great result Mr Mouse. Throttle cables i have as tight as i can get, as Hooli said, just enough to not change revs when bars turned. TPS, 1.1 k ohms closed at sensor. I only worry about closed resistance. Idle speed 1100, mine cuts out at less. Healtech ATRE fitted, can of worms but certainly helped mine. I ride other bikes and always amazed just how smooth 14 is, any revs, any gear. Just my 10 cents worth.

[KiwiCol]

Good on ya mate, stuck with it & sorted it. 

[Irish in Oz]

So you mean thriving on neglect Irish......

Not from riding, but it's sitting up now for about 18 months so I'm sure when I fire it up in about 9 months time it will come up with every fault code there is.
But I'm not worried because it will be sorted here 

Are you heading back to Aussie in 9 months?   Has it been 18 months since you went back 'home'?  Geez, that went quick.

2 years in May going back for a while in Oct/Nov after the long hot summer.

[Fieldmouse]

Good, great result Mr Mouse. Throttle cables i have as tight as i can get, as Hooli said, just enough to not change revs when bars turned. TPS, 1.1 k ohms closed at sensor. I only worry about closed resistance. Idle speed 1100, mine cuts out at less. Healtech ATRE fitted, can of worms but certainly helped mine. I ride other bikes and always amazed just how smooth 14 is, any revs, any gear. Just my 10 cents worth.

Thanks Grog,
I'm certain mine was a cable issue. My TPS is at 1300 at the sensor plug, no adjustment left. My will definitely idle lower, so I might try 1000 rpm again just to reduce shock load selecting f1st gear. But other than that mate, the old girl is just amazing to ride now, because I fair had the 💩's on with her riding at low revs/speeds.

Anyway, I hope, although as easy as it turned out to be, it could be helpful to others in the future.

[Fieldmouse]

Good on ya mate, stuck with it & sorted it. 

Thanks Col, I appreciate your help 👍

[Eric GSX1400K3]

Not sure  where you are mr mouse, but a TRE (timing retard eliminator) is also perhaps a good idea.  Steve at Rated R parts here in perth WA sells them, makes a big difference, and its pure plug and play.

Type this into ebay: Auto TRE SUZUKI Timing Retard Eliminator - GSX1400  Smart ATRE  GSX-1400

Glad its all worked out, vacuum leaks can be pita to track down.

[Hooli]

I'd definitely checking throttle body balance and then re calibrating the TPS.

Good luck

Hey Froudy,

Checked TPS, and can't get it lower than 1.4. Is there any use balancing throttle bodies if TPS is out? Do I need new sensor? Got same reading from two multimeters.
Maybe a redhead match will solve the issue 🤬

Yes & no.

As others have said depends where you check the resistance as to what it reads but it's still worth balancing the throttles as that means all cylinders are running equal throttle.

[Fieldmouse]

Not sure  where you are mr mouse, but a TRE (timing retard eliminator) is also perhaps a good idea.  Steve at Rated R parts here in perth WA sells them, makes a big difference, and its pure plug and play.

Type this into ebay: Auto TRE SUZUKI Timing Retard Eliminator - GSX1400  Smart ATRE  GSX-1400

Glad its all worked out, vacuum leaks can be pita to track down.

Righto, thanks Eric, I will have a look mate.
Cheers

[Fieldmouse]

I'd definitely checking throttle body balance and then re calibrating the TPS.

Good luck

Hey Froudy,

Checked TPS, and can't get it lower than 1.4. Is there any use balancing throttle bodies if TPS is out? Do I need new sensor? Got same reading from two multimeters.
Maybe a redhead match will solve the issue 🤬

Yes & no.

As others have said depends where you check the resistance as to what it reads but it's still worth balancing the throttles as that means all cylinders are running equal throttle.

Hooli, 
Where can I find thread on here about throttle body balancing. I've plugged it into forum search engine, but got nothing 🤷‍♂️   I've got the balancer, but am wondering how to access the intakes to the throttle bodies. I've looked in through air box, but not enough room. I did the old hose to the ear and listen trick.
I hope airbox doesn't have to be removed?!

Cheers mate

[KiwiCol]

Here ya go Fieldmouse.

https://gsx1400owners.org/forum/index.php?topic=4631.0