Last year I had a 2017 Ktm 350 and loved it, but this year I decided to go for the 18 450 and it seems I have made a massive mistake. I’m an expert level rider but the 450 just makes me so tired, I get arm pump after about 3 laps in a race and struggle to hold on and it’s ruining my racing. Apart from the obvious of going back to a 350 ( which I may do in a few weeks if this carries on) is there anything you can recommend I do to help? I haven’t touched the gearing yet it’s still standard. I’ve had my suspension set for my weight. Thanks