For Campbell and others who've been messing with the pilot jet deal. I
tried some #157.5 jets in my PAJ-2 to replace stock original #170's. At
the same time I removed .020" shims from my stock needles. I have #155
main jets, the pilot screws are still about 2.5-2.75 turns out. I didn't
change this. I still have diaphragm springs tied (5-6 turns) otherwise the
engine is stock but with Mark's 4-2-2 exhaust.
The only obvious change the smaller PAJ's gave me was an overall richer
mixture at lower rpm, response everywhere is still very smooth and even.
Pulling away from as low as 1800 rpm in top is even smoother now, not that
you have to do that all that often. The plugs started to darken up from an
off white gray look to actually developing some light tan coloring on the
lower porcelain after mainly light throttle cruising everywhere from
2000-4500 in top gear. Much of it was at 2500-3500 in top.
Most significant thing, was something everyone at one time complains
about, that little lean blip coming back down through the gears as you are
slowing down and blipping the throttle on the downshift. Well it's
definately gone.
To take it a step further, I believe I could probably put a #160, #162.5,
#165 till the blip comes back. Go back down one number to get rid of it
and reinstall the .020" needle shims and evaluate that setup.
This is all easy and quick to try. I believe even the guys with the stock
engines and exhausts would benefit most from the smaller PAJ's without
adding shims to needles. This accompanied by about 2.5 turns out on the
pilot needles I believe is a better approach for a dead stocker than
shimming needles. I believe non California bikes don't need the shims, but
would benefit from the PAJ change more than anything else.
What are everyone elses thoughts? Is there any merit in my logic?
Sam Blumenstein #795
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