ok so they do make a lot of power difference
yes a 28mm will go best from 140 to a 250cc
28mm isnt too big for a 140...
i used to run one years ago and it would sht on yx150's with 26mm oko's (geared the same)
but 26mm is the best selection as there literally a bolt on carb after changing the main jet to a 96 for a 140
and ty, your engine is a 155 lol not a 160
oko made a world of difference.. I run them on 2 of my 3 bikes..
hmm might get one for my dpro 140 after the suspension upgrade
and u might wanna look at this:
http://www.miniriders.com.au/carby-tuning/23986-those-about-rock-buying-oko-flatslides.html
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