2023 KLX 300 Review. I Just spent $7500 on a KLX 300. Now that I can re-program the ECU and am developing pipes with Delkevic pipes, I'm excited to make this bike awesome. Stock though, there is not much there. Here are the pros and cons on my personal list. It will be great in the end though and worth you buying. Keep watching as we improve the performance of this KLX 300 on BestDualSportBikes.com