dirtdog

My son has a 98 ttr 125. It recently has been bored with new piston&rings, Probably only a couple hours on new parts. Bike al;ways starts on 2nd or third kick.Very dependable.Went to race last night..kid statred bike up and drove over to practice...bike sputtered and died. Wouldnt start..even pushing it. Pulled plug...it has spark when we kick it. Pulled fuel line...gas coming into carb. Using same gas as last race so gas should be fine.Im thinking maybe a clogged jet but my sons saying it doesnt feel like it has the same compression (feels ok to me). My compression gauge is too big to fit plug hole so I cant check it at the moment.Any ideas??