Rain will probably be more of a mental thing than anything, at low speeds it shouldn't be too bad unless you redline and drop the clutch mid turn lol. Watch out for the white painted lines on the course, although they probably aren't the same as the kind they use on actual streets which get slick in the cold and wet. I was lucky my msf was near the end of summer but temps were in the 90s, had to retake my driver license picture when I was all sweaty lol. Good luck hope to have another licensed rider with us
