Topica Loopframe_Guzzi Archive


Subject: RE: Crummy Running

Author: sund-@olywa.net

Date: Jul 3, 2001, 5:00 PM

Post ID: 1707358723


DJ -

Been reading the Crummy Running posts. If it runs strong with the revs up and the
throttle is open, then an overall shortage of fuel or spark is not too likely.

Like someone said, the wash job could be a coincidence.

Stuff that would make it run crummy at low speed only: Jammed centrifugal advance
mechanism, clogged idle jets, clogged low speed jets, low voltage to the ignition at
low rpm, hmmm - I'm kinda rusty at this.

Can you ride it while its running curmmy? Ride along for a mile or so with a steady
throttle and suffer with the miss. Then switch it off without changing the throttle position
and coast to a stop. Pull the plugs. If one or both are black and sooty, then something
may be wrong with the spark. If one or both show signs of getting white or light tan,
then there may be a shortage of fuel. Take it from there. Sometimes ya hafta try a few
times to get a reading that makes sense. This also tells you if it is one hole or both
that is missing. (I musta done this a jillion times to get those Mikunis jetted to have good
manners.)

Does it backfire some when it is running like crap?

BobG

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Paul,
Dry as a bone. First thing I checked. Checked the points while I was at it, and they were in spec.
I may take Eric's suggestion and spray it with WD40 just for an additional precaution, but the
distributor was clearly dry, as were the spark plug caps. I thought it was likely a moisture issue
too, but none to be found. While there could certainly be moisture tucked into some spark plug or
coil cap, it has been weeks since this bike was washed, and it has been in a dry, climate controlled
garage ever since.
Dennis
----- Original Message -----
From: Paul Linn
To: Loopfram-@topica.com
Sent: Monday, July 02, 2001 10:23 PM
Subject: RE: Crummy Running


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sounds like a moisture issue to me. How does the inside of the cap and distributor look?
-----Original Message-----
From: Dennis Jones [mailto:dbjo-@cobweb.net]
Sent: Monday, July 02, 2001 9:36 PM
To: Loopfram-@topica.com
Subject: Crummy Running


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Eldo won't run right. Here's what I know. Rode the Eldo round trip to and from the Western NY
Rally. Ran perfectly, not so much as a hiccup. Got it home and washed it good of those pesky
Western New York bugs. Used S100 and a hose as I have done often in the past. Polished it and
parked it. Because of family obligations, and a need to ride some of my other bikes, the Eldo sat
til tonight. It was difficult to start. Unusual. Rode off, and it didn't want to idle at stop
signs/traffic lights, etc. Rode it for mebbe 15 minutes. Would stall if rpm weren't kept at 2,500
or more. Engaging the clutch resulted in feeble performance. Lots of slippage of the clutch to
keep it from stalling. Would run rough and bike would shake until I gave it lots of throttle and
got rpms up. Would then clean up and run strongly to redline, but returning to below 4,000 rpm
would start the symptoms all over again.

I am getting spark at the plugs. The spark plug wires & caps are dry and firmly attached. Ditto
coil. Gas in the tank. Checked float bowls. Carbs are getting gasoline. Points adjusted properly.
Checked the airbox, and even ran it without the airbox. Same result.

Other than the bike wash, the bike was running PERFECTLY, and had run perfectly for 800 miles,
before I parked it.

Any suggestions, other than to never wash the bike again?
D.J.

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