When you're holding the throttle giving it gas the compression of the engine forces excess gas up the tube into the Boost bottle storing it there ... when you let go of your throttle cutting off the gas from the carburetor to the engine..that allows the gas to trickle back down out of the bottle to your engine. >allowing your bike to (idle better> lower) also gives you more (boost conserves gas) allows you bike to run better. Some professional instructional videos claim keep your( engine cooler) cuz idols lower and give you (more torque when riding )I don't know all the benefits but I do know adding this expansion chamber in between the carburetor and engine definitely helps... also if you have a expansion chamber muffler on your bike that's a plus.. having bottle and muffler expansion chamber on both sides of your engine allowing maximum performance.... the expansion chamber Muffler is shaped in a way that allows the air pushing out to bounce back off the funnel shape so it pushes back and forces gas back up the muffler into the engine conserving gas and using your atomized gas... cleaner Muffler no oil and gas in it so no more leaky baffle ...won't need to clean out and not wasting gas... it's a good idea to upgrade carberator air intake to a less restricted air flow high pro motorcycle / dirt bike air filter
I completely agree with you in the video on the answer to no it's not worth it. The last thing you ever want on these engines is it to be lean and it just causes way more problems. Should always keep it safe and simple
Boost bottles ain't worth using..seems like the carb is too busy trying to fill the bottle and not the engine...plus a shorter intake seems to work better..why add more travel...
