[kyriakos]

New RPS Hawk 250; but lacks power at top end. I've been reading 60 mph top stock, but I couldn't get it above 42. I rejetted the stock carb to 115, opened air box a bit, set the mixture at 1.5 turns out, set valve lash to .002, and was able to get top to 45-46 on flat ground. I thought it may be speedometer, but GPS confirms my speed at ~46.

Two sprockets arrived today and it feels good in lower gears, but I can't get any speed out of 5th gear... bogs out. My goal is a pretty simple 60-65 top speed highway, 55 cruising. Based on everything I've read, I should be there, but it's struggling. Any ideas?

I'm in Georgia, at sea level, temp ~70.