So I posted earlier this month. boss pipe with hi flow intake and 12mm carb, everything else stock. but the boss was out of stock so I ended up (happily) with a Proma GP, and since I had to reorder I added a Bing 15mm carb and intake. I have some random jets- 58, 62,64,66, 68, 69. I'm sure one of those would work with the 12mm but no clue where to start with the bigger carb. Help?