Disco

Hi lads, Was wondering if someone could point me in the right direction with this. I have a TDR 125 - runs ok and idles perfect up to a point where your riding her and she starts to lose power and sort of shake forward and backwards (if you know what i mean). If you reduce the revs by lowering the throttle she will continue on, but if you keep the throttle open at the poing where she shakes forward and backwards, she will cut out and will sometimes take time to get her started again. Would anyone have any ideas what this could be ? just rescently done a complete top end rebuilt. Thanks for all help on this lads, Dave

Hi lads, Just new here and plan to stick around I have a TDR 125 - was on it today and its moving grand but after a while it starts to lose power . I got it up to 105kms today which is about 63 mile an hour. Next thing you know it starts to slow down on its own . If you hold it constantly for a while you might be lucky for it to get back up to speed but not always. Sometimes you have to wait until you go down a gear and then it will be grand again for a while . This happens 2 to 3 times in a 10 mile journey. Anyone have any ideas ? could this be the YPVS ? Thanks very much for your time, Dave