Hate to throw a spanner in the works, but I used those Keyster kits on my 750/4, and they were….well…..rubbish. The float bowl gaskets dissolved when in contact with fuel, and it just wouldn’t tune up properly. I stripped them again and put most of the old bits back in and it ran heaps better. A dyno tune man near me also said to throw away the kits and get only original, as he had nothing but trouble with them. Jet sizes are only very approximate to their stamping. But I’m sure there are others who have used them and had no issues. Peter.