Originally Posted by Scott Fisher

I have the Sirio XXX. I have only run the 2611 pipe (older version). I am still using the orginal rod as they seem to last the way the Novarossi rods do.
I have not had a problem making 5 mins yet but it doesn't get the mileage that the IDM engine gets.
This engine seems to have a more broad power band. It still has good top end like what we are used to, but better bottom end than some of the earlier Sirio engines. I do have a good clutch setup that seems to work pretty well.