Here's the latest:
2007 865/270 SM
TPUSA 813 Cams
TPUSA +3 Igniter
Uni 4229 Pod filters
Chevy 605 LC pipes (ends removed, 2 baffles out, 3rd & 4th drilled)
Med G-Pop adjustable baffles installed in pipes
PVL (Nology) coils
TPUSA Magnecor Wires
BC AI Removal Kit
NGK IX Plugs
152 Keihin Mains (the brand matters)
48 Pilots
Pilot Screws approx. 1+ out
N3RF (TBS) Needles
Float heights approx. 18.5mm
Polished Slides with stock 2.5mm transfer port
Yamaha FZ1 slide springs
1.38mm air bleed holes in throttle plates
Now closing in on about as good as this may get. WOT & upper RPM is good (mostly in & about the low to mid 13's AFR), & the previously problematic 4 - 6k RPM WOT rich dip is gone.
In 55 degree F weather, warm motor idles approx mid-13's AFR.
65 MPH (indicated) cruise is just over 14 AFR.
Light throttle, hi-RPM hovers just under 14 AFR.
Light throttle, low-RPM dips down in the 11 - 12 AFR range, however the bike is rarely operated there.
Overall, the 48 pilots work better for me than the 45's did, however I don't think it's the optimum size. A 46.5 -47 would be better, if available.
When not "on the throttle", the pilots play a large role. Getting that right can pay big dividends in overall driveability & satisfaction.
The motor feels & sounds the strongest yet. I suspect the stellar mileage I was getting with the 45 pilots & air bleed mod will be negated somewhat by the 48's, however I have no plans to go back to the 45's.
The ironic thing is if I didn't have an on-board AF meter I would be absolutely THRILLED with the way this thing runs, however I think there's a bit more to be had with optimal tuning.
I may still experiment more with the needles...
