2010 EC300 Factory Jetting Specs - WTF?

[jeffs2200]

I tried the n3ch 3rd clip, 40 pilot and 175 main. Airscrew about 1.5 turns out.

500ft asl temps around 50degrees F.

The bike starts good and runs crisp from the first crack of the throttle. It has quite a bit more snap than with the n1ef needle. It seems to rev out better as well. I may try a 178 main and see if that makes any difference as well. It felt like it may be able to use a little more fuel up top. When you hit a long straight at wot then back off it would make a little noise, or surging. Very little but enough to make me think it could use a little more fuel.