Not sure what happened or if someone reported this already, but the B18C5 JRSC 440cc 16 ohm calibration now needs to be fixed.
In between the 4500 and 5500 rpm on the low cam tables, it has an rpm index of 136 rather than 5000.
Obviously for both fuel and timing tables.
This appeared right after I upgraded to 1.4.5 and is the same on my other computer running the latest beta.