v50 III stalls when warm (after 5-7 miles)

[acorrea]

Help...My v50 will run great for about 7 miles...then stalls. If I let it sit for 10 minutes it will fire right up and run great again long enough to get home and park it. Is this a coil issue? Electric box issue? Valve clearance? I am planning on checking these items this weekend but wanted to get some expert advice first.

BTW - This is my first Guzzi and I am loving the bike and the Guzzi community.

Thanks in advance for your help.

[pete roper]

Another thing. Make sure the choke plungers are seating properly. Are the plugs black when it dies?

Pete

[Rafael]

Same thing happened to my T-3 a couple of times, turned out to be a bad coil the first time and junk clogging the petcock screen the second time. electronic ignitions either works or not unless it cuts out it may be a bad connection.
good luck.

[chris a]

Couls also be a blocked petrol tank vent...probebly in the filler cap.

[acorrea]

Guys, thanks for the additional items to check. One other detail - when the bike stalls, it does so when waiting at a light and not while running so it doesn't just cut out. It will happen when the light goes green and I go to accelerate and the bike boggs and turns off. Hope this sparks some more ideas.

[john zibell]

Guys, thanks for the additional items to check. One other detail - when the bike stalls, it does so when waiting at a light and not while running so it doesn't just cut out. It will happen when the light goes green and I go to accelerate and the bike boggs and turns off. Hope this sparks some more ideas.

The symptom you describe fits all of the above. The easiest thing to check is the gas cap vent. Take a run with the cap off. If it doesn't stall when taking off from the light, that is your answer. If it does, you know it isn't the cap and can check the coils and other items mentioned.

[rossw]

I have seen these symptoms in two other vehicles. OK, they were both cars, but the problem in both cases lay with the electronic ignition. What would happen is that the ignition module would work fine until it got hot, then mysteriously and suddenly die.

Once given a chance to cool down again, it would function perfectly, until it got hot. Lather, rinse, repeat. Apparently very common in early Ford Lasers. The other vehicle I've seen do it was a WB ute. It could be something worth checking.