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External
Since: Oct 19, 2004
Posts: 4
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(Msg. 1) Posted: Tue Oct 19, 2004 12:15 pm
Post subject: Spark plugs are getting killed pretty fast
Archived from groups: alt>motorcycles>yamaha (more info?)
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Hello all. I have recently purchased a 1980 Yamaha 650 Heritage Special
from a friend for a whopping $100.00. After doing so, I had to do some work
on it to get it up to speed. New handlebars, new cables(clutch, front
brake, ect.), new output shaft seal, a whole lot of cleaning up, and an
entire upper block rebuild (Head gasket was blown, so I figured I might as
well change all the gaskets). After doing all this, my spark plugs wore out
in a couple of weeks. I took it to a cycle shop in my area, and found that
after cleaning out my carbs, their sync was way off. So they hooked the
bike to their machine, and set the carbs to sync at 14cm, just like they're
supposed to. I bought more spark plugs, and it ran like a dream come true.
Then, about two weeks later, the spark plugs did the same thing. I'm
running out of ideas as to why this is happening. Any insite would be
greatly apprecieated. |
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External
Since: Jul 17, 2003
Posts: 11
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(Msg. 2) Posted: Tue Oct 19, 2004 1:27 pm
Post subject: Re: Spark plugs are getting killed pretty fast [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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Johnny wrote:
> <snip> After doing all this, my spark plugs wore out
> in a couple of weeks.
Define "wore out". Covered with oil, rich mixture, burned, melted,
broken, what?
I've a feeling that if you find the meaning of "wore out", you'll also
find the cause of the problem.
LittleJohn
Madison, AL<!-- ~MESSAGE_AFTER~ --> |
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External
Since: Oct 19, 2004
Posts: 4
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(Msg. 3) Posted: Wed Oct 20, 2004 12:07 am
Post subject: Re: Spark plugs are getting killed pretty fast [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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Well, I suppose they're burned. They have a black solid substance on them
that does not appear to be oil. The actual structure of the plug looks the
same, so I wouldn't say they're broken or melted
"Johnny" <carcrash.TakeThisOut@i-55.com> wrote in message
news:cl3eni$bth$1@news.datasync.com...
> Hello all. I have recently purchased a 1980 Yamaha 650 Heritage Special
> from a friend for a whopping $100.00. After doing so, I had to do some
work
> on it to get it up to speed. New handlebars, new cables(clutch, front
> brake, ect.), new output shaft seal, a whole lot of cleaning up, and an
> entire upper block rebuild (Head gasket was blown, so I figured I might as
> well change all the gaskets). After doing all this, my spark plugs wore
out
> in a couple of weeks. I took it to a cycle shop in my area, and found
that
> after cleaning out my carbs, their sync was way off. So they hooked the
> bike to their machine, and set the carbs to sync at 14cm, just like
they're
> supposed to. I bought more spark plugs, and it ran like a dream come
true.
> Then, about two weeks later, the spark plugs did the same thing. I'm
> running out of ideas as to why this is happening. Any insite would be
> greatly apprecieated.
>
><!-- ~MESSAGE_AFTER~ --> >> Stay informed about: Spark plugs are getting killed pretty fast |
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External
Since: Jul 17, 2003
Posts: 11
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(Msg. 4) Posted: Wed Oct 20, 2004 8:29 am
Post subject: Re: Spark plugs are getting killed pretty fast [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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Johnny wrote:
> Well, I suppose they're burned. They have a black solid substance on them
> that does not appear to be oil. The actual structure of the plug looks the
> same, so I wouldn't say they're broken or melted
You're running way too rich. As both carbs appear to have the same
problem, you probably made a mistake when you reassembled them. Take
then apart again and make sure you have the correct needle jets in the
correct seats. Either that or both floats are bad, which is possible. Use
a short length of clear neopreme tubing for a quick check of the fuel
level in the bowls. (Easy to do, just google for instructions if you don't
know how.)
Good luck.
LittleJohn
Madison, AL<!-- ~MESSAGE_AFTER~ --> >> Stay informed about: Spark plugs are getting killed pretty fast |
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External
Since: Jun 09, 2004
Posts: 98
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(Msg. 5) Posted: Thu Oct 21, 2004 12:49 am
Post subject: Re: Spark plugs are getting killed pretty fast [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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In article <pan.2004.10.20.12.29.36.669020 DeleteThis @DeleteMe.knology.net>,
LittleJohn <littlejohn DeleteThis @DeleteMe.knology.net> wrote:
> Johnny wrote:
>
> > Well, I suppose they're burned. They have a black solid substance on them
> > that does not appear to be oil. The actual structure of the plug looks the
> > same, so I wouldn't say they're broken or melted
>
> You're running way too rich. As both carbs appear to have the same
> problem, you probably made a mistake when you reassembled them. Take
> then apart again and make sure you have the correct needle jets in the
> correct seats. Either that or both floats are bad, which is possible. Use
> a short length of clear neopreme tubing for a quick check of the fuel
> level in the bowls. (Easy to do, just google for instructions if you don't
> know how.)
And double-check that you have the right heat range plugs in the bike.
If they're too cold, they'll foul.<!-- ~MESSAGE_AFTER~ --> >> Stay informed about: Spark plugs are getting killed pretty fast |
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