I been running right around 40:1.....
Yeah, sids right.. I know i've had several leaks around the intake/reed cage myself... ANd a word of caution/advice..... Keep an eye on all bolts and nuts also, mine have worked loose/.... Guess that's why somebody invented loctite
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Carb cleaner is good to use also but of course the scoot needs to run and w/o the fan shroud you cant let it run long.... I woulda thought a 130 would be plenty big enough, but of course i'm still learning...
You can make a tester pretty cheap, if you search for the cheaper prices but around $20 i have in mine. It's not fancy but it works