i was wondering wether boost bottles relly work because i want to improve the bottom end on my yz 250 and lt 250 and dont want to throw good money at bad[img]i/expressions/face-icon-small-confused.gif[/img]

 

i havent tried one, but everyone i talk to says to not watse the money. guess it deoends mostly on what youre putting it on.

[img]i/expressions/face-icon-small-wink.gif[/img]

 

Don't bother with a boost bottle.

 

they suck, I put one on my 02 Shee and didn't notice a bit of difference in power, either hill climbs or racing down on the beach. I honestly could not tell the difference and thought to myself, well that was stupid I just flushed $40.00 down the toilet. If I still had my boost bottle I would give it to you. My advice would be not to buy one, it looks cool but thats it.

 

I had one on my YZ490. Didn't really help much. One on my banshee didn't help either. The came factory on my TRI-Z, but after taking it off and plugging the hole I didn't notice any difference.

I am guessing your YZ is late 70's early 80's?