interesting read, They mention the rev limiter and too expensive for a new module... when I was looking for one for my old bike I found that these guys had a unit they could mod for most bikes 1-6 cylinders
re programmable curve and limiter etc, they could even sort fuel injection
my old V-twin carbed bike was going to be $150US.... but I managed to find my fault outside of the ECM so didn't use them
http://www.ignitech.cz/en/vyrobky/tcip/tcip.htm