My 2 Cursors both had Hanno 61's and my Boxer 60 had one also. They all ran between 10400 and 10600 with APC 12-12 narrow or APC 12-11 wides. I always ran Morgan Cool Power 15%. I did try 25% and did not see enough performance gain to spend the extra. Hope this helps. Still have a bunch of Hanno's and am putting the old Cursor back together. Just love that 2 stroke idle.

BCNU

Mark O