Project Pro Circuit KTM 125 SX 2 Stroke RAW Dirt Bike Magazine

For this edition of RAW we take a look at our Project Pro Circuit KTM 125SX 2 Stroke. Pro Circuit put a ton of time into developing the engine on our KTM125 including designing a new exhaust that not only produces more power but is also lees likely to be kept the stock bore and stroke so the bike is legal for the 125cc class. Pro Circuit ported the cylinder, milled the head and installed a Vertex piston made to their specs sold exclusively through them. Most of the engine hardware was replaced wi