For some decent bottom end power, instead of an SHA, I'd go by a PHBG 15 or 16. They are mofos to tune, but they are the best for the buck.The Sha clone came with the air filter frome the picture from above but I adapted it to the stock carb. Comparing the jet that came with the clone with the wrong jets that the aliexpress sent (4mm) I think it was something to .90 and I think that was the problem with not staying at idle. Maybe another week until the 5mm jets are coming (If they sent the wrong size again I will burn the carb ). If I knew that the "performance" carb is a dellorto clone, I would go for a original one but I gained new information and found new things about carbs with this mistake.
But to pick a specific model, there's quite a list of things to consider:
If you desire a carburetor with a specific connection (Flanged, SHA style female slot, rubber manifold and hose clamps); a left or right handed position of the choke level, idle screw and A/F screw; the presence or absence of an oil mixer circuit; and if your choke should be operated via a throttle cable, or manually.
Dell'Orto has all sort of variants in matter of PHB type carburetors. I'm omitting the "G" because in the Dell'Orto nomenclature, the last letter points out the size range of the carburetor's venturi, the G is from 15 to 21 mm.
PHBs ranges all the way from 15 to 36mm monsters!