Checked the mileage since I went to the 155 main & trimmed the white spacer to about .06". Riding reasonably( I know, very subjective) not much time spent seeing what the top end is, tries twice, got to 82 once & 85 the next day. Some time spent rolling easy at 35 in traffic, high gear, putting along. Most of the time tho is 50 & up. Managed 42 MPG, a 7 MPG increase. Now, I will give the 152.5 a shot, soon as it gets here.Oh, I dont just wind the throttle open & wait for the engine to catch up, I dial it thru the torque. Very rarely do I get any backfire at all. no growling, snarling on decel, & I really miss that. Isnt a big single sposed to have more personality? Is it possible I will wind up with the 150 back in it? Seems pretty lean for a bike with the header inner wall gutted out of it, a Supertrapp with 14 baffles, K&N drop in, snorkel removed, & ( senior moment) the expensive hot plug. OHH ea, Irridium,, I knew I knew that.

You mean pull the cap & run it open?
If so, nope, hadnt even considered it..