Make sure you order all the screws nuts etc. when you order the adaptor bracket. ERC
Scottie, Please don't go for the 105 needle jet, I really doubt you need it and it may cause very weak, hot running, pinking [pinging] and even holed pistons and / or sieziure. If you must, try it and hopefully you will notice right away that it is too small and switch back to a larger one. As a yardstick, I am also heavily into Triumph Tiger Cubs and only some of the softer tuned later ones ran a 105 needle jet in their very small 375 Monoblocs, most Sports Cubs had 106 in a 376 size. I still would not rule out a 107 improving things for you. B.W.
B.W.Scottie is at nearly a mile high in elevation above sea level in Denver, Colorado..