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Next: New bike dilemma.
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External
Since: Dec 08, 2003
Posts: 7
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(Msg. 1) Posted: Sun Dec 14, 2003 1:42 pm
Post subject: 1984 PW80 engine problem
Archived from groups: rec>motorcycles>dirt (more info?)
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My son and I were out riding this morning and his bike kept stalling when
he'd come to a stop. Each time, it became more and more difficult to restart
it; I had to completely open the throttle to get it to fire. After it
stalled again, I attempted to restart it and noticed it was increasingly
harder to kick (it required more force to kick) and it made a "squeaking"
noise each time I kicked it. I kicked gently it, worried that it felt like
it was seizing, and then it did. The kick-start locked up completely and I
was unable to kick it any more.
I'm not overly mechanically inclined and am worried that what it felt like
might actually have happened...the motor has seized up. If that's the case,
for the life of me, I can't imaging why.
I checked the engine oil and gear (transmission) oil and both levels were
fine. I drained the gear oil and it looked to be a bit lighter in color than
I would have expected making me wonder if there might have been some water
contamination. Nonetheless, it still felt fine and did not appear to contain
any metal pieces or other contaminates.
Am I on the right track here? Could the engine have seized despite appearing
to me well oiled? What are the potential ramifications if it is seized i.e.
since it wasn't running when it happened, could it be relatively easy (read:
cheap) to fix or could I still have done some significant damage?
Any insight into what might have happened would be appreciated. I want to
get some ideas before taking to the dealer ($$$).
Thanks,
Todd. |
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External
Since: Apr 01, 2004
Posts: 93
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(Msg. 2) Posted: Sun Dec 14, 2003 4:05 pm
Post subject: Re: 1984 PW80 engine problem [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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Todd,
Your sweaking could have possibly been a broken ring. The ring might have
broke and then now it has fallen down into the exhaust and lodged it between
the piston and the exhaust/cylinder wall. DO NOT force it. Take the head off
and see what is going on.
My .02,
Iowa883
"Todd" <sliderxp21REMOVETHIS DeleteThis @hotmail.com> wrote in message
news:vtpin9g13jebfe@corp.supernews.com...
> My son and I were out riding this morning and his bike kept stalling when
> he'd come to a stop. Each time, it became more and more difficult to
restart
> it; I had to completely open the throttle to get it to fire. After it
> stalled again, I attempted to restart it and noticed it was increasingly
> harder to kick (it required more force to kick) and it made a "squeaking"
> noise each time I kicked it. I kicked gently it, worried that it felt like
> it was seizing, and then it did. The kick-start locked up completely and I
> was unable to kick it any more.
>
> I'm not overly mechanically inclined and am worried that what it felt like
> might actually have happened...the motor has seized up. If that's the
case,
> for the life of me, I can't imaging why.
>
> I checked the engine oil and gear (transmission) oil and both levels were
> fine. I drained the gear oil and it looked to be a bit lighter in color
than
> I would have expected making me wonder if there might have been some water
> contamination. Nonetheless, it still felt fine and did not appear to
contain
> any metal pieces or other contaminates.
>
> Am I on the right track here? Could the engine have seized despite
appearing
> to me well oiled? What are the potential ramifications if it is seized
i.e.
> since it wasn't running when it happened, could it be relatively easy
(read:
> cheap) to fix or could I still have done some significant damage?
>
> Any insight into what might have happened would be appreciated. I want to
> get some ideas before taking to the dealer ($$$).
>
> Thanks,
>
> Todd.
>
><!-- ~MESSAGE_AFTER~ --> |
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External
Since: Jul 17, 2003
Posts: 106
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(Msg. 3) Posted: Sun Dec 14, 2003 5:39 pm
Post subject: Re: 1984 PW80 engine problem [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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Todd wrote:
> My son and I were out riding this morning and his bike kept stalling when
> he'd come to a stop. Each time, it became more and more difficult to
> restart it; I had to completely open the throttle to get it to fire. After
> it stalled again, I attempted to restart it and noticed it was
> increasingly harder to kick (it required more force to kick) and it made a
> "squeaking" noise each time I kicked it. I kicked gently it, worried that
> it felt like it was seizing, and then it did. The kick-start locked up
> completely and I was unable to kick it any more.
Broken skirt, or ring. Probably came apart and wedged between piston and
port, or fell down and wedged between crank and case. Don't force it.
Just pull the head and barrel off it. You can rebuild the top end blind
folded, it's about a 10 minute job on a PW. If the skirt did brake off the
piston, you will want to split the cases or at the very least pull the
engine off the frame and rinse it out thouraghly with kerosene.
>
> I'm not overly mechanically inclined and am worried that what it felt like
> might actually have happened...the motor has seized up. If that's the
> case, for the life of me, I can't imaging why.
>
> I checked the engine oil and gear (transmission) oil and both levels were
> fine. I drained the gear oil and it looked to be a bit lighter in color
> than I would have expected making me wonder if there might have been some
> water contamination. Nonetheless, it still felt fine and did not appear to
> contain any metal pieces or other contaminates.
>
> Am I on the right track here? Could the engine have seized despite
> appearing to me well oiled? What are the potential ramifications if it is
> seized i.e. since it wasn't running when it happened, could it be
> relatively easy (read: cheap) to fix or could I still have done some
> significant damage?
The oil in the transmission has nothing to do with the engine, it's a
2-stroke. The tranny oil never even comes into contact with any part of
the engine, hence the reason it looks light-no burned hydrocarbons. All of
your engine lube comes from the 2-stroke oil in your injector. If you had
the wrong oil (should be good quality injector type 2-stroke like Yamalube)
in the injector resevoir, it would cause a seizure. Sometimes people
mistakenly put 10W40 in the tranny and injector res, but the injector won't
push 10W40. Also, sometime people disable the injector and "forget" to
tell the new owner.
Eric
>
> Any insight into what might have happened would be appreciated. I want to
> get some ideas before taking to the dealer ($$$).
>
Do the work yourself. If you are going to get into the dirtbike game, best
learn now on something as simple as the PW. Tear down is simple, it's even
in the owner's manual provided by Yamaha.
Eric
--
2000 XR250, '74 Elsinore MR50 (original owner),
'99 CR80 (11yr old daughter), '96 RM80 (14yr old son), 2000 DS80 (visiting
kids).
Remove "nospam" from reply-to<!-- ~MESSAGE_AFTER~ --> >> Stay informed about: 1984 PW80 engine problem |
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External
Since: Dec 08, 2003
Posts: 7
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(Msg. 4) Posted: Tue Dec 16, 2003 2:29 pm
Post subject: Re: 1984 PW80 engine problem [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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Eric and Iowa:
Thanks for the suggestions.
I pulled the head off and the cylinder looked fine and there was no evidence
of any scratching or scoring of the cylinder.
I didn't force it too much, but I was able to kick it over and ultimately
start the bike again, but it didn't run well for long. It simply dies at
idle so I have to give it some throttle to keep it going.
I'll have the local shop give it the once over and then get a manual and
start learning.
Any leads on where I can get a manual for a PW80?
Thanks again,
Todd.
"Eric B" <ericbish.DeleteThis@yahoo.com> wrote in message
news:0K6dnd_Ii868bEGiU-KYkQ@giganews.com...
> Todd wrote:
>
> > My son and I were out riding this morning and his bike kept stalling
when
> > he'd come to a stop. Each time, it became more and more difficult to
> > restart it; I had to completely open the throttle to get it to fire.
After
> > it stalled again, I attempted to restart it and noticed it was
> > increasingly harder to kick (it required more force to kick) and it made
a
> > "squeaking" noise each time I kicked it. I kicked gently it, worried
that
> > it felt like it was seizing, and then it did. The kick-start locked up
> > completely and I was unable to kick it any more.
>
>
> Broken skirt, or ring. Probably came apart and wedged between piston and
> port, or fell down and wedged between crank and case. Don't force it.
> Just pull the head and barrel off it. You can rebuild the top end blind
> folded, it's about a 10 minute job on a PW. If the skirt did brake off
the
> piston, you will want to split the cases or at the very least pull the
> engine off the frame and rinse it out thouraghly with kerosene.
>
> >
> > I'm not overly mechanically inclined and am worried that what it felt
like
> > might actually have happened...the motor has seized up. If that's the
> > case, for the life of me, I can't imaging why.
> >
> > I checked the engine oil and gear (transmission) oil and both levels
were
> > fine. I drained the gear oil and it looked to be a bit lighter in color
> > than I would have expected making me wonder if there might have been
some
> > water contamination. Nonetheless, it still felt fine and did not appear
to
> > contain any metal pieces or other contaminates.
> >
> > Am I on the right track here? Could the engine have seized despite
> > appearing to me well oiled? What are the potential ramifications if it
is
> > seized i.e. since it wasn't running when it happened, could it be
> > relatively easy (read: cheap) to fix or could I still have done some
> > significant damage?
>
> The oil in the transmission has nothing to do with the engine, it's a
> 2-stroke. The tranny oil never even comes into contact with any part of
> the engine, hence the reason it looks light-no burned hydrocarbons. All
of
> your engine lube comes from the 2-stroke oil in your injector. If you had
> the wrong oil (should be good quality injector type 2-stroke like
Yamalube)
> in the injector resevoir, it would cause a seizure. Sometimes people
> mistakenly put 10W40 in the tranny and injector res, but the injector
won't
> push 10W40. Also, sometime people disable the injector and "forget" to
> tell the new owner.
> Eric
> >
> > Any insight into what might have happened would be appreciated. I want
to
> > get some ideas before taking to the dealer ($$$).
> >
> Do the work yourself. If you are going to get into the dirtbike game,
best
> learn now on something as simple as the PW. Tear down is simple, it's
even
> in the owner's manual provided by Yamaha.
>
> Eric
>
> --
> 2000 XR250, '74 Elsinore MR50 (original owner),
> '99 CR80 (11yr old daughter), '96 RM80 (14yr old son), 2000 DS80 (visiting
> kids).
> Remove "nospam" from reply-to
>
>
><!-- ~MESSAGE_AFTER~ --> >> Stay informed about: 1984 PW80 engine problem |
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External
Since: Dec 08, 2003
Posts: 7
|
(Msg. 5) Posted: Tue Dec 16, 2003 6:03 pm
Post subject: Re: 1984 PW80 engine problem [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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A shop manual, that is.
"Todd" <sliderxp21REMOVETHIS DeleteThis @hotmail.com> wrote in message
news:vtuu7f9difgg7d@corp.supernews.com...
> Eric and Iowa:
>
> Thanks for the suggestions.
>
> I pulled the head off and the cylinder looked fine and there was no
evidence
> of any scratching or scoring of the cylinder.
>
> I didn't force it too much, but I was able to kick it over and ultimately
> start the bike again, but it didn't run well for long. It simply dies at
> idle so I have to give it some throttle to keep it going.
>
> I'll have the local shop give it the once over and then get a manual and
> start learning.
>
> Any leads on where I can get a manual for a PW80?
>
> Thanks again,
>
> Todd.
>
> "Eric B" <ericbish DeleteThis @yahoo.com> wrote in message
> news:0K6dnd_Ii868bEGiU-KYkQ@giganews.com...
> > Todd wrote:
> >
> > > My son and I were out riding this morning and his bike kept stalling
> when
> > > he'd come to a stop. Each time, it became more and more difficult to
> > > restart it; I had to completely open the throttle to get it to fire.
> After
> > > it stalled again, I attempted to restart it and noticed it was
> > > increasingly harder to kick (it required more force to kick) and it
made
> a
> > > "squeaking" noise each time I kicked it. I kicked gently it, worried
> that
> > > it felt like it was seizing, and then it did. The kick-start locked up
> > > completely and I was unable to kick it any more.
> >
> >
> > Broken skirt, or ring. Probably came apart and wedged between piston
and
> > port, or fell down and wedged between crank and case. Don't force it.
> > Just pull the head and barrel off it. You can rebuild the top end blind
> > folded, it's about a 10 minute job on a PW. If the skirt did brake off
> the
> > piston, you will want to split the cases or at the very least pull the
> > engine off the frame and rinse it out thouraghly with kerosene.
> >
> > >
> > > I'm not overly mechanically inclined and am worried that what it felt
> like
> > > might actually have happened...the motor has seized up. If that's the
> > > case, for the life of me, I can't imaging why.
> > >
> > > I checked the engine oil and gear (transmission) oil and both levels
> were
> > > fine. I drained the gear oil and it looked to be a bit lighter in
color
> > > than I would have expected making me wonder if there might have been
> some
> > > water contamination. Nonetheless, it still felt fine and did not
appear
> to
> > > contain any metal pieces or other contaminates.
> > >
> > > Am I on the right track here? Could the engine have seized despite
> > > appearing to me well oiled? What are the potential ramifications if it
> is
> > > seized i.e. since it wasn't running when it happened, could it be
> > > relatively easy (read: cheap) to fix or could I still have done some
> > > significant damage?
> >
> > The oil in the transmission has nothing to do with the engine, it's a
> > 2-stroke. The tranny oil never even comes into contact with any part of
> > the engine, hence the reason it looks light-no burned hydrocarbons. All
> of
> > your engine lube comes from the 2-stroke oil in your injector. If you
had
> > the wrong oil (should be good quality injector type 2-stroke like
> Yamalube)
> > in the injector resevoir, it would cause a seizure. Sometimes people
> > mistakenly put 10W40 in the tranny and injector res, but the injector
> won't
> > push 10W40. Also, sometime people disable the injector and "forget" to
> > tell the new owner.
> > Eric
> > >
> > > Any insight into what might have happened would be appreciated. I want
> to
> > > get some ideas before taking to the dealer ($$$).
> > >
> > Do the work yourself. If you are going to get into the dirtbike game,
> best
> > learn now on something as simple as the PW. Tear down is simple, it's
> even
> > in the owner's manual provided by Yamaha.
> >
> > Eric
> >
> > --
> > 2000 XR250, '74 Elsinore MR50 (original owner),
> > '99 CR80 (11yr old daughter), '96 RM80 (14yr old son), 2000 DS80
(visiting
> > kids).
> > Remove "nospam" from reply-to
> >
> >
> >
>
><!-- ~MESSAGE_AFTER~ --> >> Stay informed about: 1984 PW80 engine problem |
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External
Since: Jul 17, 2003
Posts: 106
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(Msg. 6) Posted: Wed Dec 17, 2003 8:09 pm
Post subject: Re: 1984 PW80 engine problem [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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Todd wrote:
> A shop manual, that is.
>
> "Todd" <sliderxp21REMOVETHIS.RemoveThis@hotmail.com> wrote in message
> news:vtuu7f9difgg7d@corp.supernews.com...
>> Eric and Iowa:
>>
>> Thanks for the suggestions.
>>
>> I pulled the head off and the cylinder looked fine and there was no
> evidence
>> of any scratching or scoring of the cylinder.
>>
>> I didn't force it too much, but I was able to kick it over and ultimately
>> start the bike again, but it didn't run well for long. It simply dies at
>> idle so I have to give it some throttle to keep it going.
>>
>> I'll have the local shop give it the once over and then get a manual and
>> start learning.
>>
>> Any leads on where I can get a manual for a PW80?
>>
>> Thanks again,
>>
>> Todd.
Check the con rod for play-side to side is ok, up and down is very bad.
You can get the owner's manual from Yamaha's website-it has the engine tear
down directions in it. You can also get a regular shop manual that is far
more detailed.
Eric
>>
>> "Eric B" <ericbish.RemoveThis@yahoo.com> wrote in message
>> news:0K6dnd_Ii868bEGiU-KYkQ@giganews.com...
>> > Todd wrote:
>> >
>> > > My son and I were out riding this morning and his bike kept stalling
>> when
>> > > he'd come to a stop. Each time, it became more and more difficult to
>> > > restart it; I had to completely open the throttle to get it to fire.
>> After
>> > > it stalled again, I attempted to restart it and noticed it was
>> > > increasingly harder to kick (it required more force to kick) and it
> made
>> a
>> > > "squeaking" noise each time I kicked it. I kicked gently it, worried
>> that
>> > > it felt like it was seizing, and then it did. The kick-start locked
>> > > up completely and I was unable to kick it any more.
>> >
>> >
>> > Broken skirt, or ring. Probably came apart and wedged between piston
> and
>> > port, or fell down and wedged between crank and case. Don't force it.
>> > Just pull the head and barrel off it. You can rebuild the top end
>> > blind
>> > folded, it's about a 10 minute job on a PW. If the skirt did brake off
>> the
>> > piston, you will want to split the cases or at the very least pull the
>> > engine off the frame and rinse it out thouraghly with kerosene.
>> >
>> > >
>> > > I'm not overly mechanically inclined and am worried that what it felt
>> like
>> > > might actually have happened...the motor has seized up. If that's the
>> > > case, for the life of me, I can't imaging why.
>> > >
>> > > I checked the engine oil and gear (transmission) oil and both levels
>> were
>> > > fine. I drained the gear oil and it looked to be a bit lighter in
> color
>> > > than I would have expected making me wonder if there might have been
>> some
>> > > water contamination. Nonetheless, it still felt fine and did not
> appear
>> to
>> > > contain any metal pieces or other contaminates.
>> > >
>> > > Am I on the right track here? Could the engine have seized despite
>> > > appearing to me well oiled? What are the potential ramifications if
>> > > it
>> is
>> > > seized i.e. since it wasn't running when it happened, could it be
>> > > relatively easy (read: cheap) to fix or could I still have done some
>> > > significant damage?
>> >
>> > The oil in the transmission has nothing to do with the engine, it's a
>> > 2-stroke. The tranny oil never even comes into contact with any part
>> > of
>> > the engine, hence the reason it looks light-no burned hydrocarbons.
>> > All
>> of
>> > your engine lube comes from the 2-stroke oil in your injector. If you
> had
>> > the wrong oil (should be good quality injector type 2-stroke like
>> Yamalube)
>> > in the injector resevoir, it would cause a seizure. Sometimes people
>> > mistakenly put 10W40 in the tranny and injector res, but the injector
>> won't
>> > push 10W40. Also, sometime people disable the injector and "forget" to
>> > tell the new owner.
>> > Eric
>> > >
>> > > Any insight into what might have happened would be appreciated. I
>> > > want
>> to
>> > > get some ideas before taking to the dealer ($$$).
>> > >
>> > Do the work yourself. If you are going to get into the dirtbike game,
>> best
>> > learn now on something as simple as the PW. Tear down is simple, it's
>> even
>> > in the owner's manual provided by Yamaha.
>> >
>> > Eric
>> >
>> > --
>> > 2000 XR250, '74 Elsinore MR50 (original owner),
>> > '99 CR80 (11yr old daughter), '96 RM80 (14yr old son), 2000 DS80
> (visiting
>> > kids).
>> > Remove "nospam" from reply-to
>> >
>> >
>> >
>>
>>
>
>
>
--
2000 XR250, '74 Elsinore MR50 (original owner),
'99 CR80 (11yr old daughter), '96 RM80 (14yr old son), 2000 DS80 (visiting
kids).
Remove "nospam" from reply-to<!-- ~MESSAGE_AFTER~ --> >> Stay informed about: 1984 PW80 engine problem |
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