Have billet aluminum spacer that a buddy made. They have small air tubes connecting them. I was wondering if this would give a similar effect to a booster bottle??

I would like to first ask; What does a booster bottle do?
...what is it's function?

As a 2 stroke runs, it creates a positive pulse in the intake track. Some of this pulse gets by the reed valve (not a problem on a rotary motor). The "boost bottle" is there to pull that little positive pulse that gets by the reeds over to the other cylinder that going through its intake cycle. By doing this, it keeps raw fuel from backing up into the carb and air box. If you can remember back to the mid 70's, those motors spit back more fuel than it took in :D.
Do "boost bottles" add performance, IMO no. They do however keep the idle and midrange cleaner by not having the raw fuel sitting in the air box to be sucked in during a Intake stroke.
I know of more than one person with a series III doo motor that had twin pipes that had problems getting the fuel dialed in until after they removed the bottle and plugged the holes. Doo dropped the "boost bottle" in 03 on the REV chassis...umm, guess they found out it didnt work either.

As far as linking the two spacers together with a small hose, I wouldnt! The spacers however in some cases do help out, and give added HP.


Brian

I use 1/4" spacers on a machz and seen a little better e.t. in the 1/4 mile but noticed a lot better throttle response. :hallo1: