the thing that pvl does for you is a) removes rotating mass(good for mx/wot riding, not good for woods), b) allows you to set the timing wherever you want and gives you a bigger spark. these are analog just like stock, so the advance curve for the ignition is straight, aka the advance is the same the whole time no matter the rpm, the big difference is you can put that curve at whatever degree you want.
1985 Honda ATC250R drag trike with s/t kit and full drag CR hybrid motor and drag chassis...
1986 Honda ATC250R daily rider fully modded engine, +4 swinger,etc...
1997 Polaris Storm 800 triple, boyesen reeds, dg individual silencers, 240 studs, 123mph on radar...