My Homelite 25 is on EI and runs really well. The only trouble I have with it is this: When I bring it up to full throttle, It will reach max RPM at about 3/4 throttle. When I push the stick past 3/4, it tends to slow down a bit. The EI system is RCexl with auto advance. Could this be a timing problem or a carb problem, ie high speed needle? I have not checked max RPM's, but will do that now. It has a 16 x 8 MA prop. What kind of max rpm should I be getting? It is totally stock except for EI and a Zenoah G26 carb.