54mm S125 Engine Rebuild Bigbore Kit 125cc Upgrade to 138cc PIT PRO DIRT BIKE

Brand New 54mm S125 Engine Rebuild Bigbore Kit 125cc Upgrade to 138cc PIT PRO DIRT BIKE DIAMETER OF BORE Approx. 54.03mm DISTANCE BETWEEN HEAD BOLTS (CENTRE HOLE TO CENTRE HOLE) CLOCKWISE EACH TWO BOLTS Approx. 51.93mm / 50.83mm / 50.37mm / 51.13mm HEIGHT OF THE BARREL (NOT INCLUDE THE SLEEVE) Approx. 76.69mm HEIGHT OF THE SLEEVE Approx. 20mm DIAMETER OF PISTON Approx. 53.26mm HEIGHT OF PISTON Approx. 37.14mm LENGTH OF PISTON PIN Approx. 40.89mm DIAMETER OF PISTON PIN Approx. 13.94mm Tag : PIT PRO, PIT Bike, Trail Bike, Dirt Bike, Motorcross Bike, MX Bike