Today I rode the GSA and the 501 back to back and the first time I could give the 501 some beans. I rode the 501 with lots of open throttle today - mud, gravel snow and ice mix road - and I really like the 501. I took it to Waiparous and then back to HWY 40 north onto Water Valley through some serous mud , ice and gravel mix. This thing was a piece of cake off road compared to the GSA today. -especially through the mud. I have been told the stock TKC 80’s are crap on the 501 but I was happy with them today. And I felt like I was flying on the gravel roads as if it is on rails ( maybe the steering dampener?)- I’m easily faster on it than the GSA -it really likes to be ridden in high revs on gravel - doing 120 plus on the gravel felt great. It’s a little off road monster.