In some forms of racing, two-strokes still rule. One is western off-road races like the National Grand Prix Championship. There, two-strokes go head to head with four-stokes of the same displacement. For the 2019 season, Troy Vanscourt built a KTM 250SX for the 250 expert class and Pro 2. He chose the SX because it has a more aggressive power delivery than the XC, and because it’s lighter–no electric start. Here’s how the project came together.
- Precision Concepts re-valved and re-sprung the shock for our off-road application and reworked the WP air fork to match.
- Supersprox Stealth rear sprockets feature an aluminum core for weight reduction and steel drive teeth for increased wear life.
- The IMS Core footpegs are available in three different sizes—MX, Enduro and Rally—with standard or sharp teeth.
- Blais Racing ported and polished the cylinder for some additional performance without compromising durability.
- The GPR Version 4 Pro Stabilizer kit comes complete with a top triple clamp, bar mounts, a frame mount and a Version 4 under-the-bar stabilizer.
- The IMS oversized tank holds around 3 gallons and is available in multiple color choices with a quick-dump or screw-top option.
- Seal Savers are made of neoprene and designed to fit over your fork seals to keep out debris and prevent damage that might cause the seals to leak oil or air.
- The Warp 9 wheelset provides some much-needed strength to handle grueling off-road-style events.
- Nitro Mousse foam inserts have a high concentration of nitrogen in a micro-matrix of proprietary elastomers, giving them a tube feel without the possibility of flats.