I have recently installed a temp gauge and tachometer on my stella to better understand my jetting before I upgrade the head on my scoot. I am aware that I have been extra cautious with the jetting keeping it what I think is slightly rich at 118 main jet for 32F day. A couple days ago, I finally ran it for an hour or so with the new gauges on to see what my baselines were.. and found that I could never get the RPM over 5000 even on a mile or so on a less busy highway area. Max speed at about 50mph and engine temps were consistently 180F only getting up to about 200F after that mile on the highway (45F +/- day in NYC). So today, I swapped the 118 main jet which was slightly rich for 32F day, for a 116 main jet, and was able to rev up to 6500 possibly more, never went on the highway, and temps were 200F consistent, max 220F.
After looking at the manual, I see that it gets peak power at 5500 RPM stock. This led me to wonder if that should be the max at stock or if it is just the peak power range with excess RPM available. What is the max RPM for a stock engine? Anyone have specific details?
My engine and carb is stock, but I do have a SIP Road XL pipe, and Boyesen reeds. Carb idle jet 140/45 main stack 140/be1/116.