Resonator chamber spacer

[C George]

Has anybody ever tried one of these ?

It's a 3/16 to 1/4" spacer that increases the size of the resonator.

If I'm correct , I believe the resonator itself makes the exhaust
tract slightly longer at low rpm's.

I'd like to try one on the 200.

[KDXrider1989]

If you mean resonator as in expansion chamber or header pipe, then yes you will notice a little more low-end grunt at the expense of a few hundred rpm's on top end pull. theres many threads already on here about it

[C George]

The resonator chamber is on the left side of the engine cylinder. a rectangular box roughly 1.5 x 3.0"
The exhaust goes in there when the aux. ports are closed.

[Julien D]

Yes, someone used to make one at some point, but I haven't seen or heard of one in a while. And I believe you are correct, should add low end power.