For the 500ES the correct jets are main 120, pilot 25 and neddle on top nocht.
The carb comes with too rich jets kit, from 132 to 140 I think with 25 and 38 pilot (I don't find the 19 the catalog says). I don't know the correct float chamber level (at work). The air filter I fit is a paper Amal type (the round chrome piece with holes, you know).
The carb has better precission than stock Micarb, You gain torque easyly (top speed not so easyly). Bolts to fit are a little short, you must look for another ones.
I'm waiting for a spacer and turbulator to refit with the idea to find the best carb job. I will let you know.