If I was racing on a track, this setup would not work, I would have to pick up the the lever to down shift. I can see alot of missed down shifts and sliding off the track in the middle off the corners,lol.
I run a 3 1/2 mile run, in the redwood forest, on a Highway with a 35 to 45 MPH speed limit, there's logging trucks and stuff flying down the road too, so, I am just Road Kill,lol. It's all upshifting and flat out, maybe one down shift into third, then back to wide open. It has a PBU 28 tooth billet alum rear gear, and I started w/ a 16 up front and hit 55 in third on the China speedo, but it made 4th to high geared. Since, I put a 15 up front, but have not tested it yet. Have a 22mm w/ the pilot and main jet gauge drilled to the next size. The PZ19 on it now, has both jets one size bigger. Yesterday the rubber mount broke off the blue finned CDI, and it was hanging down, so got out my 200 mph tape and put it back together. Has a hp coil & X12 hp side exhaust that's Very Loud.
It was running real hot at the end of the run, so I added a $60 oil cooler, and mounted it to the upper left under the frame, it keeps it from blocking air to the engine. That helped alot, runs cooler now.