1996 VMAX mystery issue

"e" <someone RemoveThis @some.domain> wrote in message
news:d1cog.31776$Bh2.19154@fe07.news.easynews.com...
> In article <i3b2a29e0v1hsbbek9fkoh0v29icaq2fjd RemoveThis @4ax.com>, STi
> <nobody RemoveThis @nowhere.com> wrote:
>
>>
>>I have a1996 VMAX with 42000KM on it. never had any trouble with it.
>>Yamaha serviced at 30000KM (valve adjust/carb sync) . Stored in
>>winters. started up fine this summer,BUT..I was freeway driving at
>>70MPH when sudenly "lost" a cylinder and had minimal oil coming out LF
>>(#2) cylinder and was running very rich. Have 200PSI compression in LF
>>cylinder,all rest 150. leakdown test was 11%. Found nothing to cause
>>such a loss..
>>
>>left the bike to sit for 3 days,started up and it ran
>>acceptably,perhaps a little "rich". any suggestions of what cd have
>>happened to cause that little "fart" that went away all by itself??
>>thanks
>
> what is your storage drill?
The difference in compression should not exceed 10% . Several things jump to
mind as to possible cause(s) of your problem. most immediate is some sort of
head gasket problem, after that check the valve/lifter assembly perhaps one
exhaust valve is not opening all the way (which would explain both rich
condition and higher compression) I've seen lifter/rocker assembly slip of
center before also bent fulcrum assembly. I believe that the v-max has
removable cam covers. you may be able to visually inspect the movement of
the valve train on the affected cylinder. hope this helps
 >> Stay informed about: 1996 VMAX mystery issue 

"walt peifer" <lensman.RemoveThis@tampabay.rr.com> wrote in message
news:hKwog.21139$LT2.1695@tornado.tampabay.rr.com...
>
> "e" <someone.RemoveThis@some.domain> wrote in message
> news:d1cog.31776$Bh2.19154@fe07.news.easynews.com...
>> In article <i3b2a29e0v1hsbbek9fkoh0v29icaq2fjd.RemoveThis@4ax.com>, STi
>> <nobody.RemoveThis@nowhere.com> wrote:
>>
>>>
>>>I have a1996 VMAX with 42000KM on it. never had any trouble with it.
>>>Yamaha serviced at 30000KM (valve adjust/carb sync) . Stored in
>>>winters. started up fine this summer,BUT..I was freeway driving at
>>>70MPH when sudenly "lost" a cylinder and had minimal oil coming out LF
>>>(#2) cylinder and was running very rich. Have 200PSI compression in LF
>>>cylinder,all rest 150. leakdown test was 11%. Found nothing to cause
>>>such a loss..
>>>
>>>left the bike to sit for 3 days,started up and it ran
>>>acceptably,perhaps a little "rich". any suggestions of what cd have
>>>happened to cause that little "fart" that went away all by itself??
>>>thanks
>>
>> what is your storage drill?

> The difference in compression should not exceed 10% . Several things jump
> to mind as to possible cause(s) of your problem. most immediate is some
> sort of head gasket problem, after that check the valve/lifter assembly
> perhaps one exhaust valve is not opening all the way (which would explain
> both rich condition and higher compression) I've seen lifter/rocker
> assembly slip of center before also bent fulcrum assembly. I believe that
> the v-max has removable cam covers. you may be able to visually inspect
> the movement of the valve train on the affected cylinder. hope this helps

I was going to say that possibly an oil ring got stuck - pulled in oil (talk
about rich!) then left some in the cylinder causing a fake higher CR
resulting in the 200psi reading. Leave it for a bit (or drive it), the ring
gets unstuck, life goes on as normal.

Try the compression test again (assuming all is normal) and see if it's more
of a level playing field now....
 >> Stay informed about: 1996 VMAX mystery issue 

that makes sense..stuck oil ring...i will drive for a bit (which i
have done) and then re-check compression.

thanks.




On Wed, 28 Jun 2006 18:45:32 -0700, "John Craker" <watts.DeleteThis@dccnet.com>
wrote:

>"walt peifer" <lensman.DeleteThis@tampabay.rr.com> wrote in message
>news:hKwog.21139$LT2.1695@tornado.tampabay.rr.com...
>>
>> "e" <someone.DeleteThis@some.domain> wrote in message
>> news:d1cog.31776$Bh2.19154@fe07.news.easynews.com...
>>> In article <i3b2a29e0v1hsbbek9fkoh0v29icaq2fjd.DeleteThis@4ax.com>, STi
>>> <nobody.DeleteThis@nowhere.com> wrote:
>>>
>>>>
>>>>I have a1996 VMAX with 42000KM on it. never had any trouble with it.
>>>>Yamaha serviced at 30000KM (valve adjust/carb sync) . Stored in
>>>>winters. started up fine this summer,BUT..I was freeway driving at
>>>>70MPH when sudenly "lost" a cylinder and had minimal oil coming out LF
>>>>(#2) cylinder and was running very rich. Have 200PSI compression in LF
>>>>cylinder,all rest 150. leakdown test was 11%. Found nothing to cause
>>>>such a loss..
>>>>
>>>>left the bike to sit for 3 days,started up and it ran
>>>>acceptably,perhaps a little "rich". any suggestions of what cd have
>>>>happened to cause that little "fart" that went away all by itself??
>>>>thanks
>>>
>>> what is your storage drill?
>
>> The difference in compression should not exceed 10% . Several things jump
>> to mind as to possible cause(s) of your problem. most immediate is some
>> sort of head gasket problem, after that check the valve/lifter assembly
>> perhaps one exhaust valve is not opening all the way (which would explain
>> both rich condition and higher compression) I've seen lifter/rocker
>> assembly slip of center before also bent fulcrum assembly. I believe that
>> the v-max has removable cam covers. you may be able to visually inspect
>> the movement of the valve train on the affected cylinder. hope this helps
>
>I was going to say that possibly an oil ring got stuck - pulled in oil (talk
>about rich!) then left some in the cylinder causing a fake higher CR
>resulting in the 200psi reading. Leave it for a bit (or drive it), the ring
>gets unstuck, life goes on as normal.
>
>Try the compression test again (assuming all is normal) and see if it's more
>of a level playing field now....
>
 >> Stay informed about: 1996 VMAX mystery issue 

I put gas stabilizer in, change oil and filter.block off air
intake/cover exhaust.cover and store in heated dining room. The only
thing i may have done wrong is I did not drive it last year, but i did
drain the gas and put new in with stabilizer.
The bike now runs fine, quite rich, but strong. It's like it had a
hairball and farted it out!! thanks for your reply,and any further
ideas wd be appreciated.



On Tue, 27 Jun 2006 15:20:41 GMT, someone DeleteThis @some.domain (e) wrote:

>In article <i3b2a29e0v1hsbbek9fkoh0v29icaq2fjd DeleteThis @4ax.com>, STi <nobody DeleteThis @nowhere.com> wrote:
>
>>
>>I have a1996 VMAX with 42000KM on it. never had any trouble with it.
>>Yamaha serviced at 30000KM (valve adjust/carb sync) . Stored in
>>winters. started up fine this summer,BUT..I was freeway driving at
>>70MPH when sudenly "lost" a cylinder and had minimal oil coming out LF
>>(#2) cylinder and was running very rich. Have 200PSI compression in LF
>>cylinder,all rest 150. leakdown test was 11%. Found nothing to cause
>>such a loss..
>>
>>left the bike to sit for 3 days,started up and it ran
>>acceptably,perhaps a little "rich". any suggestions of what cd have
>>happened to cause that little "fart" that went away all by itself??
>>thanks
>
>what is your storage drill?
 >> Stay informed about: 1996 VMAX mystery issue 

"STi" <nobody DeleteThis @nowhere.com> wrote in message
news:jg89a2lkjvg87aq72u7uuhu6khe6ne8lbf@4ax.com...
>I put gas stabilizer in, change oil and filter.block off air
> intake/cover exhaust.cover and store in heated dining room. The only
> thing i may have done wrong is I did not drive it last year, but i did
> drain the gas and put new in with stabilizer.
> The bike now runs fine, quite rich, but strong. It's like it had a
> hairball and farted it out!! thanks for your reply,and any further
> ideas wd be appreciated.
>
>
>
> On Tue, 27 Jun 2006 15:20:41 GMT, someone DeleteThis @some.domain (e) wrote:
>
>>In article <i3b2a29e0v1hsbbek9fkoh0v29icaq2fjd DeleteThis @4ax.com>, STi
>><nobody DeleteThis @nowhere.com> wrote:
>>
>>>
>>>I have a1996 VMAX with 42000KM on it. never had any trouble with it.
>>>Yamaha serviced at 30000KM (valve adjust/carb sync) . Stored in
>>>winters. started up fine this summer,BUT..I was freeway driving at
>>>70MPH when sudenly "lost" a cylinder and had minimal oil coming out LF
>>>(#2) cylinder and was running very rich. Have 200PSI compression in LF
>>>cylinder,all rest 150. leakdown test was 11%. Found nothing to cause
>>>such a loss..
>>>
>>>left the bike to sit for 3 days,started up and it ran
>>>acceptably,perhaps a little "rich". any suggestions of what cd have
>>>happened to cause that little "fart" that went away all by itself??
>>>thanks
>>
>>what is your storage drill?
>
glad to here its running better. sometimes varnish can form on the intake
valves or in the carb even with stabilizer over a long period of time
especially in the carbs this could be the source of the "rich" condition
 >> Stay informed about: 1996 VMAX mystery issue 

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 >> Stay informed about: 1996 VMAX mystery issue