Do you mean 1200 RPM?
Honda CBR250RR 250cc 4 cylinder production road bike redlines at 20,000 rpm and will spin to 21,000.
Formula One has been running in the teens for decades out of necessity. Very small displacement engines need huge RPMs to get the horsepower
The privately owned airport where I kept my airplane in NC has a similar arrangement with John Deere.The Hadiesburg, Mississippi airport gets its grass cut for free. Kohler engine factory is across the street. They have a setup to test engines on a rig pulled behind a tractor. Very manicured airport.
Notice the torque curve as the rpm comes down, and how long the hp stays high. wonder what the lag is on the readings?
Not for racing, but try holding it at 75% power and see how many hours it lasts...Hi,
Many of the local lawnmower racing guys here use the 670cc Briggs, and rev them routinely to about 5k rpm. I questioned the longevity of these engines, and was repeatedly assured that some of these engines had been racing for their third year now without having been opened up. They say, however, that anything over 7k rpm tends to be a bit unreliable. I am seriously thinking of getting them to work on my big block Briggs - 70hp aught not to be a problem.