I just installed a set of Boyesen Power Reeds in my 1991 KTM 500 MX. I put the new reeds in at the same time I replaced the top end. The instructions with the reeds say the bike will run richer, mostly affecting the main jet. I've already dropped the needle 1 position which helped noticeably, however wide open throttle gurgles. The stock main jet in this carb (Dellorto VHSB 38 AD) is a 190. How do the sizes of the main jet in this carb increment; by 1's, 5's or 10's? How much do you recommend I lower the main jet for the Boyesen Reeds?