Boost Bottles

[2TInstitute]

Likewise for reed intakes there was a time we used equations to calulate reed dimensions but by the late 80s it was discovered fitting the largerst reed with the most petals you can physically stuff in there provides greater gains

Do you have anything to support this claim?

I can see big reed blocks on TZ Yamahas.
But RS250 GP Hondas ran the same small six petal reeds as the RS125, NSR250 and CR125 even after 2000.
And the 2000s YZ125 used the same size petals and a very similar size reed block as the CR125.

I haven't seen anything that discusses why the difference in the Yamaha and Honda approach.

Yep that same Honda cage will support 50hp, the latest ICC kart engines have been developing the stuffer to the enth degree. Funny the pukka-GP-you-can't-fucking-buy-this RS250W used 2 very different reed cages.

[James W.]

Article on boost bottles: http://www.dragonfly75.com/moto/YEIS.html