I have just purchased a lovely dt125r, it went lovely for the first few weeks or so but recently when i have been riding along everynow and then the bikes seems to cut off the fuel like it is starved! i cant even rev it as i am slowing down but when i come to a stop i kick it over for about 5 minutes and it will start again! the problem is it has got a lot worse recently and is happening all the time!! i have changed the plug and have got compression!! can someone help please!!!