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Re: [Virago] POP goes the Virago....

Date : Mon, 6 Aug 2007 11:59:43 -0700
To : Yamaha Virago Motorcyle Discussions <virago@xxxxxxxxxxxx>
From : James J Schneider <jjschneider@xxxxxxxxxxxx>
Subject : Re: [Virago] POP goes the Virago....
Bob,

No, not coils.  Given your description, it's gotta be a mechanical leak
somewhere.  Here's what comes to mind, from easiest to hardest:

Exhaust gasket leak - probably not.
Intake boot leak - probably not.
Blown carb slide diaphragm - probably not.
Spark plug blown out of head.  Could either be that the plug wasn't screwed
in very far OR your threads stripped.  Easy to check, more likely.
Blown head gasket - most likely, not fun, sorry.  Easy to check with
compression gage.

So, first check your plugs - are they in place?  Fouled?  Are you getting
spark?  Are the threads in the head OK?  Then check compression - the two
cylinders should be within 10 or 15 pounds of the each other.

BTW, I don't think being on the sidestand caused the problem, just
coincidence.  My 1100 also leans WAY over on the stand.  It will idle OK if
warm, but not on choke on the sidestant.  The angle doesn't seem to affect
the regular fuel metering, but fouls the choke metering all up.

Jeremy





I pulled my 1985 xv1000 out of the garage this morning and put it on
the sidestand.  I don't normally start it like that---the thing leans
so far over that I think it's gotta be bad for the fuel flow somehow.
Anyway, as I was getting my pack ready I reached over and started it
up and *POW*---something near the front blew.

At first I thought it was a loud backfire and that I only thought I
heard it come from the front, so I started it again.  It sounded
awful.  I think I heard one cylinder firing plus a "breathy" sound,
and it didn't stay on idle; it just dies without throttle.

Since I was getting to work, I didn't have a chance to investigate.  I
put it in the garage and pulled the battery ground, just in case.  I
thought I had smelled a little ozone when it first happened.

I just wondered where I might start looking when I get to work on it?
My first guess is the coils, but I'm still learning here.  Any
pointers would be much appreciated.

Best,
Bob

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