Hueligan

Hi folks, I recently bought my son a 2006/7 DT125X. It had been advertised as being in original condition but, upon delivery, I noticed a bright blue wire leading from behind the headlight assembly to the chassis. I had previously read about a DIY bypass for the YPVS which entailed cutting a wire leading into the ignition block and earthing it onto the chassis and sure enough this is what has been done to it. I reinstated the wire as it should be as I think Mr Yamaha probably knows more about building bikes than I do but the YPVS did not work. Investigation showed that not only had the bypass been fitted but some bright spark had also cut the 5 wires leading from the YPVS servo assembly. I reconnected them and plugged them into the appropriate connector block. When I turn the main power on I can now feel a small click in the servo unit but it does not turn the pulley and perform a full cycle of the valve as I believe it should. It also does nothing when the bike is actually running. I have noticed a further 2 connector blocks which I assume should have something plugged into them? The bike is fitted with a CDi unit which is located under the petrol tank. Does this run the YPVS or should there be a separate YPVS controller (perhaps plugged into those 2 spare connectors)? I do have a PDF version of the service manual for the bike but it doesn't say a lot about the YPVS other than how to adjust it. The wiring diagram is a bit too complicated for me to understand without some guidance. Any advice would be gratefully received. Regards Hue

Hi everyone, I've just bought my son his first Yamaha, a 2006/7 DT125X, so thought it would be a good idea to join the owners' forum in order to share in your undoubted expertise in all things Yamaha. I have already encountered a problem with the YPVS which I am struggling to resolve. Is this the place to post the problem specifics or should I start a thread elsewhere? Regards Hue