Here is the big bore kit proposed by ATHENA to increase the displacement of your motocross / enduro HUSQVARNA TE, TC, TXC, SMR, in 250cc 4 stroke from 2006 to 2007. This kit in Ø83mm against Ø76mm of origin thus allows to pass your motor bike of 250cc has 300cc! A gain of torque and performance will be immediately felt. It allows a gain of 4 HP on average which is huge on this vehicle. Of what amply to have fun on the tracks or in the forest. ATHENA has moreover well foreseen the things because this high engine is sold complete. It includes the cylinder, piston, ring as well as all the gaskets you need for a quality and tight reassembly. The advantage of taking this engine is that it is designed to be mounted on the original connecting rod with the original cylinder head and camshaft. So you don't have to make any modification or adjustment !