Irregular tickover

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f90x
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Irregular tickover

Postby f90x » Wed Jul 03, 2019 12:17 pm

The last couple of times I’ve taken the 12S out, the tickover has been erratic. I’ve balanced the throttle bodies the last time I did the tappets (it was doing it a bit then as well) but appears to be a permanent fixture now. It’s fine when riding but as soon as I come to a stop it’s there. Would I be correct in thinking TPS (throttle position sensor) and does anyone have any experience of this?

Steve
R1200GS TC. Triple Black
R1200S. It’s gone. Had it 11yrs. My favourite bike in 42yrs riding.

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Motobecane C3
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Humbug
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Re: Irregular tickover

Postby Humbug » Wed Jul 03, 2019 9:15 pm

Mine improved when i adjusted the valve clearances. Was erratic at tickover and stalled regularly. Had the throttle bodies checked at the time and was told that they were spot on.
10 KTM RC8

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f90x
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Re: Irregular tickover

Postby f90x » Sun Jul 07, 2019 10:03 am

Hmmm, I did the valve clearances some time back and it didn't make any difference for me. I don't have any stalling. I think I might give the TPS a clout.
R1200GS TC. Triple Black
R1200S. It’s gone. Had it 11yrs. My favourite bike in 42yrs riding.

Holdsworth professional
Motobecane C3
Brompton

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Hay Ewe^
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Re: Irregular tickover

Postby Hay Ewe^ » Mon Jul 08, 2019 9:23 pm

erratic idling will be more obvious at idle - obviously!
but as the buterflys open up inside the throttle bodies the percentage of availble airflow is greater, and so erratic flow is greatly masked.

Another problem could be the that there is wear on the TPS, the tracks inside may be worn and / or dirty (I dont know how, they are sealed).
I am experience the same on my 1150GS and will be ordering a new TPS this week.
I have a loaner at the moment and it has proved the problem
Dont get a second hand one - you dont know what condition that is like


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