Rmz 250 2014, idle problem

muttman
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muttman
Edited Date/Time 10/15/2015 6:47am
Hey
Noting happens when i try to change the idle speed!
it does idle good and steady & starts, but its a bit low atm
anyone had the saame problem?

thx
|
racinstation
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racinstation 10/14/2015 6:58am
10/14/2015 6:58am
Typically if the idle adjustment know does not have any effect on the idle, the intake valves are too tight. Check and set the valve clearance and it should idle right up. Other things I have seen cause idle screw to be ineffective are dirty injectors and dirty idle circuit. Remove the idle adjustment knob assembly and clean it and the throttle body when you are doing the valve adjustment and see if that helps. The injector will need to be sent or taken to a shop to be done.
JZ125
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JZ125 10/14/2015 10:52am
10/14/2015 10:52am
racinstation wrote:
Typically if the idle adjustment know does not have any effect on the idle, the intake valves are too tight. Check and set the valve clearance...
Typically if the idle adjustment know does not have any effect on the idle, the intake valves are too tight. Check and set the valve clearance and it should idle right up. Other things I have seen cause idle screw to be ineffective are dirty injectors and dirty idle circuit. Remove the idle adjustment knob assembly and clean it and the throttle body when you are doing the valve adjustment and see if that helps. The injector will need to be sent or taken to a shop to be done.
XXXX22222

My first thought on the valves as well. You can put whatever you want on top of an air pump, there is still an air pump there.

Do these bikes use a MAP sensor for fuel mapping or MAF?
racinstation
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racinstation 10/14/2015 4:28pm
10/14/2015 4:28pm
No, just TPS, AIT, and ET sensors on this bike.
Paw Paw 271
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Paw Paw 271 10/14/2015 5:25pm
10/14/2015 5:25pm
This unit does have a MAP sensor and a TPS. If the TPS is not set correctly, or if the MAP sensor is dirty, or if the choke and enricher are dirty or the fuel injector is dirty they will all effect the idle speed. The choke /enricher is adjustable for idle speed.

Paw Paw

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racinstation
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racinstation 10/14/2015 6:16pm
10/14/2015 6:16pm Edited Date/Time 10/14/2015 6:17pm
If you are talking about the intake air pressure sensor, then Ill agree. A MAP sensor is a bit different and is typically used as a reference for forced induction. If the IAP is dirty, you may have bigger problems because that is the air that you engine is feasting upon, and it should be filtered air.

I would place my bet on tight intake valves. I work on quite a few RMZs and have a few of my own.

Most people can't test the TPS, so lets start with a quick valve adjustment and enricher knob cleaning and go from there.

Paw Paw 271
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Paw Paw 271 10/14/2015 6:29pm
10/14/2015 6:29pm
Suzuki calls it a MAP sensor.

Paw Paw
muttman
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muttman 10/14/2015 11:02pm
10/14/2015 11:02pm
Thanks for all awnsers!
possible causes are noted and i will try some this weekend.
talked to a friends, he had the "same" problem (ktm), but in his case it was the fuel pump i think.
Is that a possible cause?


Paw Paw 271
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Paw Paw 271 10/15/2015 6:05am
10/15/2015 6:05am
Yes fuel pump can be an issue, but the fuel filter on it is a bigger issue. Normally when you have fuel pump issues , it will not work at all where as if the filter is dirty it will run like crap due to fuel starvation. A lot of fuel pump issues with the KTM's is faulty fuel pump electrical leads.

Paw Paw
JZ125
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JZ125 10/15/2015 6:47am
10/15/2015 6:47am
muttman wrote:
Thanks for all awnsers! possible causes are noted and i will try some this weekend. talked to a friends, he had the "same" problem (ktm), but...
Thanks for all awnsers!
possible causes are noted and i will try some this weekend.
talked to a friends, he had the "same" problem (ktm), but in his case it was the fuel pump i think.
Is that a possible cause?


Have you recently done a top end on this bike? Adjusted valves?

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