This is my dt 125 with 2.00 mm oversize piston(58mm)power valve is pinned fully open,full dep pipe.standard reeds for now,going to put some fibre 1s in later.im using a br8 plug.9 didnt work that good.
I havent checked what jets are in the carb but the bike seems fast enough as it is what ever they are.2 mates had a ride of it and said its the quickest 125 they been on.