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81 SP 1000 Hard to start when warm

profwacko

profwacko

Cruisin' Guzzisti
GT Famiglia
Joined
Oct 28, 2008
Messages
122
Location
Austin
A buddy of mine bought this bike and asked me to help him with it.

I have cleaned out the carbs as it had been sitting quite a while to try to help the starting issue. The only real problem was the pilot jet passageway was blocked with crud in the right carb. That definitely helped it a lot, as it now responds to changes in the pilot jet setting. The left carb looks like it had been recently redone, as it was MUCH cleaner inside.

It really runs pretty well now, but it is still reluctant to start when warmed up, requiring the choke lever to be engaged to get it started.

With the choke lever on, it starts immediately, cold or hot.

This bike has the carbs with accelerator pumps. At least, I think that's what that little triangular fitting on the carb is.

Any thoughts out there in the Guzzi Collective?

ADVthanksANCE

-Jack (in South Austin)

PS: Todd, remember that guy who came and spoke to us about a Guzzi at his used car lot? This is that bike. My buddy Walt sold his Triumph and bought it.
 
Have you checked float levels? Does moving the idle mix screw have any impact on the engine speed? Also let us know how it is jetted. She may be set very lean if you need the enriching circuit to start when hot.
 
Turning the idle jet screw definitely affects the running on both cylinders now that I have cleaned out the right side carb.

I'll have to get the owner to come by so I can get the jet numbers for you.

ADVthanksANCE

-Jack
 
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