kx 250 cylinder

LA Sleeve is the only company making a 310 piston kit, Max Power doesn't sell the pistons anymore.

I have a 99 KX cylinder made into a 310 by Eric on my bike, I am also using a 02 bottom end on that motor. The power valve in the cylinder is not the same but the cylinder and linkage all match up. I am using the Max Power piston but I have a new LA Sleeve piston, It fits but the ring end gap pins need to be moved. I have machinest friend and we are going to try it. I had a friends KTM 300 (05)piston in my hand the other day and it is a 72mm size but the ring gaps were in the right place so I thought may be Eric could make a 300 KX with that piston.? My bike runs great and dosen't need a piston now but I came by a 03 cylinder made into a 310 with out a piston so it is what I am going to try the LA Sleeve piston in it. If anyone comes out with Eric's 74mm piston again would someone let us know. Thanks Ed