Dellorto help

[Chuck in Indiana]

Yes, I hear you, and in fact reliability is all I should expect here. But I can't help thinking that if it did 90mph uphill before the flood, then I must have overlooked something in the rebuild.

Absolutely. Just because it's old doesn't mean it can't get the job done..

[SED]

The T ran pretty well up to Cripple Creek and back -- not like a new bike, but it hauled the two of us and our gear -- about 220 lb of flesh and camping gear -- up the hills to 10,000 feet and didn't hold up traffic. Got 52 mpg for the trip.

Still not happy with top-end power so this morning I installed the Dyna III that's been sitting on the shelf for four years. Much improved low and midrange, mild improvement at the high end. It still doesn't want to pull beyond 5000 rpm (80 mph). Maybe I never got all the mud out of the mufflers?  Will investigate that next.

Are you still on the 120 main?  If so, you might go back to the 142 and middle needle position then work down again.  If the main is too lean the engine will overheat quickly

Apologies if I've missed something.
Shawn

[Testarossa]

I'm on the 130 main and middle position on the needle.

[Kiwi_Roy]

I have seen guzzi distributors with unmatched springs -- one heavier and one lighter; one longer and one shorter (can't remember which).  I don't know if the designers intended it that way to smooth out the advance or whether some person simply slapped in some springs without thinking about it.  So you might want to check yours against specs.
 

That's how my Eldo is, I'm sure I've seen it in others too

[Two Checks]

Now you have made ign.ition changes which now require rejetting. Go back to the origin.al mains and watch it pull hard again at higher rpm.

[Testarossa]

Okay.  Went back to the 142 mains, and got hold of a digital tach to double check accuracy of the engine speed (the Veglia tach is sticky since the flood).

It now idles smoothly at 1050 rpm, makes good power at low and midrange up to 5000 and goes no farther.  Some popping and burbling above 4000.

Plugs look clean.

[dl.allen]

Hi any resolution on this topic?  I have the same bike and intakes with top end issues and am curious to what jets you ended up with???

[Two Checks]

Old thread, and I am curious, too.  Missed the mud in the mufflers. Pull the muffs and run it, see what it does.

[John A]

Make sure the filters have enough length. From the inside end of filter to where it clamps on should be 2.5x the inside diameter of the filter or it will not run as well at WOT, some engines will go real flat until you back out of the throttle

[chuck peterson]

That stack between carb and air filter IS a Venturi....after markets may not be?