Re: Which carb for Kstar/Boss?

Probably Fred /
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Low rpm stock crank set up ( 70 cc kit maybe with shallow case match) hi comp head, 14-16 mm carb, middle gearing (17x40, 15x36, 19x45 ), Estroil/circuit type pipe .

Aftermarket crank hi rpm set up (70cc kit maybe with deep case match and a little porting or opened intake), modded hi comp head for lower compression or mid compression head, 19-21 mm carb, low gearing (stock or 16x40), boss, 6p, simo or any hi rpm pipe.

What is your set up?

If you got part of each of these set ups in your set up your set up could be missmatched and you may not have good performance or you may go boom

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