I think it’s a KTM 50 carb

haha, I think it will be too big but lets see :)
It can work depending on pipe and port area,I'm running 24mm p/p engine with decent sized ports intake area is 23mm and exhaust is 27mm and it tunes from bottom to top with proper responce thru out the range.I say it all the time these engine's are severly lacking in cylinder fill efficaintcy if you cleaned up the ports and especaily if you corrected the transfers you can feed it alot more a/f and it will pump it no problem and you'll be happy with the gains.
 
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