I've got a boost bottle that I ordered off eBay, made by Doppler Air Company but its a big one which I guess was for 125-150cc or so bikes. They guy had it on his RG125.
the volume of the bottle should be the same CC as the engine.... if you have a 50cc then your bottle should be 50cc to work properly...if the bottle is too big it wont pressurize properly lowering the discharge pressure ultimately lowering the performance effect.. Think about it like this... You have a small balloon and a large balloon...take one breath and blow into the large one and release the air, then the same for the small one... which one filled up more and had greater pressure when released?
The cases keep pressure inside, when the piston goes up it pulls the reeds open and drawns air thru the carb, which drawns gas up the main jet tube and into the carb. That is sucked up the intake ports that could be 2 to 5 on an air cooled cag engine. When the piston starts down the reeds shut, but before they do, alittle air and gas spit out, and some of it stays in the boost tube and bottle. When the reeds open again and draw air, it also bring pre-mixed fuel into the engine.
so to get this right the boost bottle should be the same size or a little bigger right? it cant be smaller, for example i have an x2 with the stock 49cc engine if i get a 2oz bottle and connected it would it be to big or would it do something?? if am not wrong i think 2oz is 59cc.
Just try it and see, I hold back the bike with my feet & crank my engines up before I take off, warms up the clutches, and fills up your boost bottle.
When your reeds open the air going thru the carb & manifold draw pre-mixed air and fuel the bottle to help with lag of the air having to travel from the from the front of the carb inside the cses and past the crank and up the ports. Thats why a smooth path and more ports allows the engine to breath better and w/ a tuned exhaust, it will give you more RPMs.
I've been looking into doing this with a rifle cartrige. I have some different sizes of nickel plated cartriges. The .308 looks to be a little small. I am going to try between a 7.62mm cratrige and a .300 mag cartrige. probably going to have to ad some extra hose to compensate for a little bit of volume.
I found a cable barb that is eactly the right size to thread into a 30 cal cartridge of any kind.
Going to find the volume of the cartridge that way I can possibly figure out how much and what diameter hose I will need?
I dont suppose anyone has tried this before?
Edit: .300 cartridge is about 12cc, much too small I guess.
Last edited by MathieuOuellette; 03-16-2013 at 02:09 PM..
got a question not sure how or where to post it so Im just going to dive in... I picked up an x7 r5 replica and the break levers are tired and dead so I was thinking of using so high end mtb break levers but here is the snag...the safety sensor in the rear break to start via electric starter. What do I do about that little guy? I was thinking of putting it in some sort of vallet box and strapping it out of the way somwhere behind my fairing. Any thoughts? hook a brother up
got a question not sure how or where to post it so Im just going to dive in... I picked up an x7 r5 replica and the break levers are tired and dead so I was thinking of using so high end mtb break levers but here is the snag...the safety sensor in the rear break to start via electric starter. What do I do about that little guy? I was thinking of putting it in some sort of vallet box and strapping it out of the way somwhere behind my fairing. Any thoughts? hook a brother up
you can get a push button micro switch from Radio Shack and hide it under the seat, tank ect...
