Hello, Decided I needed to try a trail bike in addition to my Z900. Pick up a nearly new CRF250L next week. will review the forums to get ideas on upgrades. Especially looking at gearing recommendations 13/42?? Will be used around local lanes and dirt tracks so top end isn't a priority. It comes with a yoshi SR4 and a standard pipe is included. Sounded a bit noisy with the yoshi on but is the standard pipe even worth considering especially if looking for a bit extra performance.