OK, got my lettered JR cylinder rotax engine! Got to convert it to EVO tomorrow and install it and get the kart ready for transportation on Friday.
I am hearing that the EVO jetting is different from the jetting for the PREVO. Any suggestions for JR EVO jetting and gearing for OVRP? Saturday is scattered T-storms, similar to the last time when we rented a Rotax JR. The jetting we used on the PREVO that time was 152.