Product: Pro Circuit faced a challenge with the 2023 KTM 300SX as many riders found the stock powerband to be too powerful. The bike has undergone significant changes for 2023, with the inclusion of an electronically controlled power valve and throttle-body fuel injection integrated with spark advance through the ECU. It also offers two maps accessible through a handlebar-mounted switch – a mild white map and a powerful green map. However, the two maps have different port timing, which was not possible with previous systems. Improving the exhaust system for a bike with so many variables is quite tricky. The Works pipe, manufactured by Pro Circuit for almost 40 years, is typical of their systems. It features a raw, unfinished steel exterior and uses all the original mounting hardware. We paired it with the Pro Circuit R304 stainless/aluminum silencer, which is part of the Shorty line, similar in length to the original but with a round shape instead of oval.

Our Take: The stock KTM 300SX can be quite challenging to handle, especially in the green map. It provides power comparable to a 450, but only briefly in the middle. The ramp-up is short before and after the power burst, requiring the rider to hold on tight and shift quickly. The white map offers an easier riding experience, but once you have experienced the sheer power of the more aggressive green map, it’s difficult to go back. With the addition of the Pro Circuit Works pipe and silencer, the KTM becomes more manageable in the green map without sacrificing power. The ramp-up now starts at lower RPM and the over-rev is slightly higher. In the middle range, it actually produces a little more power than the stock exhaust, while still being easy to handle. The exhaust note is slightly louder than the stock system, but it has a rich sound that we enjoy.

Racing against 450 four-strokes will still be a challenge for the 300SX. It requires a tighter grip, quicker shifting, and more precise throttle control. However, the Pro Circuit pipe is a step in the right direction, and we are impressed that it is already available for such a new bike. We also appreciate the raw steel finish, although it’s important to note that it requires regular maintenance to prevent rust (minimum with WD-40) and occasional cleaning with Scotch-Brite.

Price: $334.95 for the pipe, $171.95 for the silencer

Contact: www.procircuit.com