duncan racing 300ex national kit

[adolfo4]

hey has anyone tried or have the duncan 300ex national kit how is the power is it alot more than stock and can i compete againt a 400ex with a pipe. and is it reliable do i have to change the pistons often and any help will be aprecited:confused: :mad:

[Jingle #11]

im sure ull be able to feel the difference but not sure about keepin up with piped 400's But if u got the 330 ud defenitly be able to keep up and pass them.

[adolfo4]

were can i get a 330 kit and for how much are the kits relible and how often will ihave to be changing the cylinder when thy wear off