Force

I checked the cables were on there properly. I knew that they run through the cleaning procedure when you turn the switch on because you can hear it whirr one way then the other when set up correctly. Checked the cables and they aren't sticking and neither is the power valve, they all run freely so I reckon it must be a signal problem. What do you reckon the best temporary fix would be then? Shall I disconnect the power to the servomotor and just move the PV to different positions until I find one that works well? I appreciate your help, thanks.

Just wanted to say a quick hi. I've recently started riding a bike, mainly green laning / enduro type riding and bought myself a DT125RE back in May 2012. Hopefully I'll have a full licence soon and am looking at getting myself a WR250! I'll be sticking around on these forums for a while as I post up more and more of my bike problems (haha), and hopefully be able to help others too with similar problems. Catch you all later!

Thanks for the quick response. As it turns out, the servo motor hadn’t died completely. It still tries to move although I’m not sure if it’s working properly. When I take off the cables and turn the electrics on, the motor rotates anticlockwise, stops at the 90° position (270° anticlockwise from top position) and shudders briefly in this position and just stops. Is this normal? With the cables on, the motor still only tries to turn anticlockwise making the right hand cable go tight and the left one slack, sometimes causing the left hand cable to pop off out of motor pulley. When the right cable goes tight the motor stops, then tries to turn anticlockwise again then just stops in this position. I’ve had a friend look at it who used to be a mechanic but he’s not sure as to why it can’t be set up properly. Does this mean I need a new servo motor? Cynic, you seem to know your stuff pretty well Will go say hi in the new members area later

Help needed quickly! I have a DT125RE (2006 model) and I also have my bike test in 3 days for my full (UK) licence. I was out practicing for my test this morning when all of a sudden the bike was losing power and was being very unresponsive when I was pulling on the throttle. The bike was making loads of noise as well. It turns out that the servo motor for the power valve (YPVS) had died on me! I phoned up my local bike garage (the only one near me) and they said that they couldn’t see to my bike until next week, after the test. Is it possible to ride the bike with the valve pinned? I’ve noticed that when you take the cover off the power valve there is pin hole on the black rotating part that lines up with the a hole in the housing. Would it be ok to pin the valve in this position to use the bike? I've read stuff about pinning the valve in position on DT125's. I don’t want to do it if it’s going to damage the bike but I won’t mind doing it just to get through the test. I don’t want to cancel the test because it’s a massive waiting list to rebook it! Thanks.