A friend of mine has an 06 Classic w/05 2.5 200efi he has run a 25 & 26 tempest plus-both on the rev limiter. Now granted the 26 is really? because the even pitch tempests are not known for true pitch. After my urging he has a 26 Fury-not on or run yet, but I believe he will run 5900 with it at close to 75. I would send your prop to mark croxton (the prop moderater on bbc) and have him fix it first, then retry before ordering your Fury. You will want a back up prop anyway. John S.