Bridgestone Motorcycle Parts Discussion Board
Bridgestone Tech Talk => 50, 60, 90 & 100 Talk => Topic started by: jbmjeff on April 21, 2020, 09:07:05 PM
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I am transplanting a BS90 motor in a chibi. I can relocate airbox/etc, but it would be a lot easier to just remove the carb sidecover and run a velocity stack with no airbox.
has anyone rejetted a bs90 carb (mikuni vm17-18) with just a velocity stack? if so, what jets?
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Sounds interesting. The BS carbs don't have a shoulder on the inlet to clamp a velocity stack in the normal way, so that's something you'd have to work around.
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I can solve the inlet/velocity stack problem with a grub screw/set screw.
the factory airbox is very restrictive, and I know that these bikes wont start/run well without some sort of airbox. I assume that someone has addressed the re-jetting necessary when the carb is just just sucking air?