all engines with centrifugal clutch have the same rpm engagement: minRPM = 2400, maxRPM = 3200.
shoudn't it be highter?
The engine clutch must be triggered at 3,000 rpm maximum and make the kart with the Driver on board move
forward; it must be in direct drive (and 100% engaged) at 5,000 rpm maximum under all circumstances.
http://www.cikfia.com/fileadmin/content/REGULATIONS/Technical/Technical%20Regulations/Web_RT_FULL.pdf
for x30 challenge it is even more: 4000-6000