I am thinking about buying a rad valve. Does it work? What exactly does it help?Is it worth the money? I ride a kdx220.fmf rev,Fredette torque ring,dropped tooth on primary
One of those 'heard people say..' is me. I've used several reed sets/combos on my bike. I've ridden side by side with another kdx modified the same as mine with the exception of reed differences.
I guarantee, promise and otherwise affirm: The moto tassinari deltaforceII reed block is a HUGE improvement over the rad valve.
...which is why the price of the rad valve has dropped something like $30 recently...sez me.
If you really really want one...buy a used one that maybe has brand new reeds on it.
The amount of performance gain from a RAD valve versus a set of Power or Pro reeds is NOT worth the extra $$. Your money could be better spent elsewhere IMHO.