Question about the correct jetting for my 1600 engine with DCOE 27 carburetors. I have a copy of the owners manual from DuettoInfo.com which lists; main jet 120, idle jet 50F11. Both Twincarbs.com and Carbparts.eu state; main jet 117, idle jet 50F14 for the 1600 spider. The other sizes are all the same. Which is correct? I've set it up with the owners manual sizes but wonder about the discrepancy. Thanks.