hello mate ,i fitted a kawasaki ae/ar 80 piston kit to my tlm 50.my one has definately been bored,but honda did make tlm 50,60,70,80,125 and so on.the bottom of the skirt on the piston has to be cut down a touch to miss counter weights on crankshaft.also the measurment from the center of the gudgen pin to the top of piston crown is slighly shorter,which will give you a bigger squish gap hence lower the compresion,which will probably take it back down to the power of a 50cc.thisis the only piston that has almost identical measurments.i hope this is useful to you......oh the bike chugs along fine.
