what makes 220 power feel electric?

[Nevada Sixx]

why does a 220 have such great bottom end, and no mid hit like other two strokes? is it mostly the porting? or could it be more in the ignition?

 

[Robcolo]

A restrictive & tuned to low rpms expansion chamber. Install the FMF and you'll see it's not proting or timing

 

[canyncarvr]

Because I'm disagreeable and contentious (but still correct ;) )....

It's port timing and a 33mm carb.

Putting a <whatever> pipe on the 220 will certainly be an improvment, but you will NEVER make it a hi-rev screamer with the existing timing and small carby.

re: electric
CDave thinks the RB carb is most responsible for this. Considers it to be one of his favorite things! ;)

Check out what he says @:

http://justkdx.dirtrider.net

As many times as I've referred this link, I'm convinced it's not read, so here:

Regarding the RB mod, Mr. Otteson says:

The results are outstanding and its become one of my favorite mods. The off idle carburetion is excellent with clean crisp throttle response. You can easily lug the bike in a gear higher that you could normally and chug your way through the slickest conditions by almost eliminating unwanted rear wheel spend then when things oven up a little off you go. The bottom end becomes very 4-stroke like.

 

[Simon Fuller]

Trying not to be too disagreeable and contentious but Nevada was commenting on the mid range hit, not the top end. An aftermarket pipe and jetting will certainly give you a mid range hit, that is what you are after. As CC says a bigger carb will be required to add substantially to the top end and will no doubt add to the mid as well.

But then I may not be correct :)