You can pass emissions with the VAFC, 450cc's and no FMU,FPR, or missing link is needed. Just do the hack and you can run around 10 psi daily. Timing may be a little advanced, so just retard the timing by around 2 degrees. Finer tuning can be done with a better type of fuel management like uberdata or hondata. Normally you would be able to pull a little bit more power from a chipped ecu. SAFC/VAFC either one would do the trick, whatever you can get a hand on.