Hi im new to trials but have been racing enduro over the past 5 years or so. Ive bought an 09 sherco, ridden it for a couple of hours and it seems to have an over fuelling issue. I can potter about at 1/4 to 1/3 throttle no issues. Give it some beans- more throttle and higher revs up a hill or even on flat and it starts to bog and blue smoke losing all power and running crap. To me its like a worn needle or the jet is wrong. It takes then a few minutes of pottering about before it clears and runs clean at low throttle. Again if i open it up back to square one and rubs crap and smokes for a few mins. Ive not had carb apart yet but was gonna go straight in with a new needle and jet if there is a recommended jet and needle part number combo thats proven. Any help appreciated.