Well, at least your bricks are still flesh colored.

Well, something isn’t exactly right trying to tune with the Dyna muffler…

The #32 pilot jet seems perfect.  The idle is very steady at 1250-1300 rpms.  This is actually an improvement.

During “roll on” testing of the main jet in 3rd and 4th gear, it stumbles or hesitates and isn’t smooth when I ease off to 7/8th throttle.  Suggesting the #130 main jet is too big.  I will go back down to a #128, but this is the main jet I was using with just the UNI air filter (no Dyna muffler).

Since I also moved the e-clip from the 2nd to 3rd groove on the needle, I’m wondering if this isn’t contributing to the issue as well.  In the low/medium midrange, it almost feels too rich as well.  I went back and forth with this when I installed the UNI filter and found I liked the 2nd groove (leaner) a little better for crisper acceleration in the midrange.  But I’m always scared of being too lean in the midrange where I do 90% of normal riding.

Now I’ll be doing 1 change at a time (like I’m told).  

I’m also still wondering if a different needle may be needed to get everything dialed in right.  

DBM - you changed the needle on your hotrod.  Ideas?  I think mine is a DDJ.  If I wanted to keep some of the low midrange richness (or correct mixture), but I wanted to lean out the upper end of the midrange, can you suggest a different needle?  Do I need less taper?  This type of advanced tuning is above my pay grade.

I wouldn’t worry too much, the Dyna muffler is very restrictive.  I suspect you could reduce to a 125 main.  Lower the needle a notch first.  Keep an eye out for surging or any other lean indications (spark plug, hesitation, hiccups, etc).

Well…. After changing the main jet about a dozen times, it’s not surprising that I over tightened and broke the float bowl drain plug.  You know…because I had to make sure the o-ring sealed good and tight!  The base that seals around the o-ring area sheared right off the plug.  It’s really thin material where they meet.

New drain plug and o-ring ordered and coming soon.  When will I ever learn!?

Maybe this time I will see how little torque can be used to get a good seal (instead of near the stripped breaking point).