Boost bottle?

[Sohighlyunlikely]

I am assuming these are just a scam, but what is the thought on these?

Steve

 

[crassius]

never seen them do much on an engine without reed valves

 

[Deleted member 12676]

boost bottles were designed for bikes with reed valve and expansion chamber.

but incidentally they offer some advantage to these stock bikes because it leans out the partial throttle mixture which these bikes need.

http://www.dragonfly75.com/motorbike/YEIS.html