Modern Vespa : Revs take a while to drop

Revs take a while to drop

rod_r

UTC

details

Addicted

1990's 50s + DR 85

Joined: UTC
Posts: 558
Location: auckland, new zealand

rod_r

Addicted

1990's 50s + DR 85

Joined: UTC
Posts: 558
Location: auckland, new zealand

UTC quote

Not a vespa, but I've recently bought a 1996 Italjet Velocifero. I had the 12mm dellorto PHVA carb tuned after I got it and the guy said it had been running rich and that he had leaned it out a bit, including dropping the needle down one notch from middle.

What I am noticing is that when I come to a stop, then engine seems to keep on revving for maybe a second or two, then quickly drops right down to idle speed.

Any ideas?

⬆️ About 1 year elapsed ⬇️

tonelar UTC details Hooked Formula 125 Joined: UTC Posts: 240 Location: San Francisco
tonelar Hooked Formula 125 Joined: UTC Posts: 240 Location: San Francisco	UTC quote That's usually a lean condition. First make sure there are no air leaks. If there aren't any, turn your air screw in a quarter turn and see if this fixes it. (My bad... I just noticed this was from last year. Can a mod move the thread?)

jimc UTC details Moderaptor The Hornet (GT200, aka Love Bug) and 'Dimples' - a GTS 300 Joined: UTC Posts: 45644 Location: Pleasant Hill, CA
jimc Moderaptor The Hornet (GT200, aka Love Bug) and 'Dimples' - a GTS 300 Joined: UTC Posts: 45644 Location: Pleasant Hill, CA	UTC quote I'll lock it...

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