Edited Date/Time:
I have a set of fasstco flexxbars on my KTM 300 and get arm pump horribly bad. I've never really suffered from arm pump before but now I seem to get it within 10-15 minutes of riding. I thought I was crazy/early season pump or whatever but I went riding with my dad and buddy yesterday and could barely hang on after minutes. I swapped bikes with my cousin (same bike, same year) who has a set of pro tapers. Did a 9 miles single track loop and no issues whatsoever. Hopped back on my bike and got arm pump immediately. Swapped bikes with my dad (TE 300) and again, no issues.
My buddy, who is roughly the same height and weight as me said his arms were killing him on my bike. My dad, who's a bit taller said he didn't get arm pump at all.
It's crazy. I want to love the bars (mainly because they were expensive!!) But I can't get over the arm pump. Has anyone else had this experience with these handlebars and arm pump? If so, is there anything I can do to help?