Georgelee07 Posted April 29, 2017 Share Posted April 29, 2017 I got myself a 2008 cbr 125The problem I have is when I start it it revs straight to around 5000 rpm. And when it makes it's way back down to about 3000 it will shoot down and cut out, Just won't idle at allThe bike has no faults according to the fi light.I've cleaned the fuel pump and fuel line. Checked the rubber boot between throttle body and head and checked the air filter housing connection and they all seem fine so it doesn't seem to have an air leak.Tested the idle air vale and it's reading ok so I assume that's working.I'm stumpedAnd help and ideas please ? Quote Link to comment Share on other sites More sharing options...
Tango Posted April 30, 2017 Share Posted April 30, 2017 Have you checked the Throttle Position Sensor (if it has one) and the Idle Air Admittance Valve (again, if it has one).....They may be called something else, this is what they're called on my Triumph..... Quote Link to comment Share on other sites More sharing options...
Georgelee07 Posted April 30, 2017 Author Share Posted April 30, 2017 I have checked to see if there's current to it and it has. I havnt actually taken it off as I'm not sure what to look for. I've also looked at the idle air valve and that seems fine. I've seen somewhere that is you take bits of or start fidling you need to reset ecu which I have just tried, and can also reset throttle position sensor bit I'm not sure how this one is done ?Any help guys Quote Link to comment Share on other sites More sharing options...
ThePhatomfart Posted April 30, 2017 Share Posted April 30, 2017 You will need to short 2 wires in the DLC, and two wires in the ECT to reset the TPS, will PM you the relevant info Quote Link to comment Share on other sites More sharing options...
Georgelee07 Posted May 2, 2017 Author Share Posted May 2, 2017 Thanks for the replyManaged to find this out in the Haynes manual and it's all sorted Quote Link to comment Share on other sites More sharing options...
Georgelee07 Posted May 10, 2017 Author Share Posted May 10, 2017 There's still a problem !! I have replaced old fuel with new to make sure the fuel wasn't the issue. The idle is temperamental, sometimes it will idle at 3000 then drop and die and sometimes it will idle correctly for ages until I rev it then it will die again. I've tried adjusting the throttle sensor but doesn't seem to have an effect so now I'm stumped.There's also no warning codes which I assume everything is ok but there's something not right Quote Link to comment Share on other sites More sharing options...
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