Author Topic: Idle Problems  (Read 1765 times)

Offline JoeW

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Idle Problems
« on: March 06, 2015, 05:27:08 PM »
In the last couple of weeks I've had 2 bikes in here with idling issues on one cylinder. Both bikes are older and using VHB carburetors. The first was an Ambassador, it ran great but, was loading up and fouling the left plug. The owner had tried what he could and then brought it to me. I've seen this problem before and other than having the jets swapped, it's usually the choke plunger. This carb had a piece of the old choke plunger stuck in the bore. Someone along the way could not get it out so, they drilled it out until a new one would fit but, didn't get the whole thing out so it would not seal.

I fished this out but there is still some in there.
The next bike had the opposite problem. It was running too lean on the right cylinder. I could spray a little carb cleaner down the throat and the idle picked right up. My young apprentice had rebuilt the carbs, (it's his newly acquired 850T). He's done a few sets and has the basics down. We pulled the carb and popped on another we had just rebuilt and the bike ran fine. On close inspection this is what I found...

Here's a good carb...

The plugs from the drilling of the idle passages are missing, where they went and why I have no clue. I'm going to try to find some small bearings and peen them in the holes.
Just thought I'd put this out there.
Joe Walano

Offline Scott DeRoss

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Re: Idle Problems
« Reply #1 on: March 06, 2015, 07:20:21 PM »
Paging Dr. Guzzi Joe, Paging Dr. Guzzi Joe! Your wanted In the emergency room!
2007 Vintage (Vinnie)
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1975 Honda CT90
1979 Beneli G2 moped
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Never take life so serious you won't get out of it alive

Offline CalVin2007

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Re: Idle Problems
« Reply #2 on: March 06, 2015, 07:26:30 PM »
 Joe, I've used drops of solder to peen into those holes. Works well and is almost free (Guzzi content) .  ;D

  Terry
'07 CalVin
 '79 TT500
 '78 SR500
 '80 SR500

Offline Chuck in Indiana

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Re: Idle Problems
« Reply #3 on: March 07, 2015, 08:27:04 AM »
This one was idling a little rich. Figured the float needed adjusted.  ;D not a Guzzi carb, but this may be the best bodge ever..
Chuck in (Elwood) Indiana/sometimes SoCal

02 Scura RC
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I think senility is going to be a fairly smooth transition for me..

Offline Kiwi_Roy

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Re: Idle Problems
« Reply #4 on: March 07, 2015, 10:41:20 AM »
 
The plugs from the drilling of the idle passages are missing, where they went and why I have no clue. I'm going to try to find some small bearings and peen them in the holes.
Just thought I'd put this out there.

My guess is you cleaned the carbs in an ultrasonic cleaner, it rattled the plugs loose

I have seen that before a friend put his Kawasaki carbs in for cleaning and several fell out, found them in the bottom of cleaner.
« Last Edit: March 07, 2015, 10:55:55 AM by Kiwi_Roy »
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