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From: Stephen Cowell on 8 Oct 2009 21:32

"tylernt" <tylernt(a)gmail.com> wrote in message
news:a16ecc39-e82e-47be-9ee7-184fdf06d5ea(a)m20g2000vbp.googlegroups.com...
> Does your Dnepr have ticklers and if so, are you tickling the carbs?
>
> You might also kick it a couple times with the ignition off to prime
> the engine.

Does it have a pumper carb? They're particular about the
starting procedure. Read the manual? In Italian?
__
Steve
..


From: Rob Kleinschmidt on 8 Oct 2009 22:28
On Oct 8, 5:26 pm, "Stephen Cowell" <stephenleeNOSPAMcow...(a)gmail.com>
wrote:
> "J. Clarke" <jclarke.use...(a)cox.net> wrote in message
>
> news:hal7je01omq(a)news6.newsguy.com...
>
>
>
> > Rob Kleinschmidt wrote:
> >> On Oct 8, 2:13 am, "J. Clarke" <jclarke.use...(a)cox.net> wrote:
>
> >>> I don't know what the Russians did but bush pilots in Alaska and
> >>> Canada used to drain the oil immediately after landing and take it
> >>> some place warm, then warm it up on a stove before they put it back
> >>> when they're ready to leave. I'm told that with synthetic oil this
> >>> is no longer necessary.
>
> >> Switching to synthetic sounds like a really good idea.
> >> Not sure if there's any downside. I normally run Mobil 1
> >> 15-50 automotive from Walmart, which isn't all that expensive.
> >> In really cold weather, maybe a 40 wt multi-vis synthetic,
> >> possibly a diesel oil.
>
> > Only real downside to synthetics that I'm aware of other than cost is the
> > possibility that there's some weird seal material that doesn't work or
> > play
> > well with them--that's unlikely but not impossible.
>
> On a new piece of equipment, the rings won't seat right
> with synthetic; most mfgrs will tell you to run the oil that
> came in it for the first thousand or so.  I've got a buddy
> that *had* to have Mobil1 installed before he took delivery...
> his bike puffs white smoke when he gets on it, still, after
> three years.

Good point. I suppose "new Dnepr" isn't really an
oxymoron after all. I don't particularly believe synthetic
damages seals though.

From: Beauregard T. Shagnasty on 8 Oct 2009 22:37
Stephen Cowell wrote:

>> Does your Dnepr
>
> Read the manual? In Italian?

� �� ����� ��� ����� ���� ���������� � ���������. :-)

--
-bts
-Could. Not. Resist.
From: J. Clarke on 8 Oct 2009 23:01
Rob Kleinschmidt wrote:
> On Oct 8, 5:26 pm, "Stephen Cowell" <stephenleeNOSPAMcow...(a)gmail.com>
> wrote:
>> "J. Clarke" <jclarke.use...(a)cox.net> wrote in message
>>
>> news:hal7je01omq(a)news6.newsguy.com...
>>
>>
>>
>>> Rob Kleinschmidt wrote:
>>>> On Oct 8, 2:13 am, "J. Clarke" <jclarke.use...(a)cox.net> wrote:
>>
>>>>> I don't know what the Russians did but bush pilots in Alaska and
>>>>> Canada used to drain the oil immediately after landing and take it
>>>>> some place warm, then warm it up on a stove before they put it
>>>>> back when they're ready to leave. I'm told that with synthetic
>>>>> oil this is no longer necessary.
>>
>>>> Switching to synthetic sounds like a really good idea.
>>>> Not sure if there's any downside. I normally run Mobil 1
>>>> 15-50 automotive from Walmart, which isn't all that expensive.
>>>> In really cold weather, maybe a 40 wt multi-vis synthetic,
>>>> possibly a diesel oil.
>>
>>> Only real downside to synthetics that I'm aware of other than cost
>>> is the possibility that there's some weird seal material that
>>> doesn't work or play
>>> well with them--that's unlikely but not impossible.
>>
>> On a new piece of equipment, the rings won't seat right
>> with synthetic; most mfgrs will tell you to run the oil that
>> came in it for the first thousand or so. I've got a buddy
>> that *had* to have Mobil1 installed before he took delivery...
>> his bike puffs white smoke when he gets on it, still, after
>> three years.
>
> Good point. I suppose "new Dnepr" isn't really an
> oxymoron after all. I don't particularly believe synthetic
> damages seals though.

Not so much damages as they don't respond the same way. Common practice in
the US auto industry, and presumably in the Russian as well, is to use seals
that are a loose fit but swell when they soak in lubricant for a while--the
loose fit eases assembly. Different lubricants will cause different degrees
of swelling, and one of the objectives in formulating different motor oils
is to produce the same degree of swelling in common seal materials. If an
oddball material is used then going to a synthetic lubricant might swell it
more or less than it is supposed to resulting in either a too tight or too
loose seal.

As for rings not seating right, depends on the oil and the design of the
engine--some exotic cars come with synthetic these days.

If the guy's bike puffs _white_ smoke when he starts it, that's coolant, not
oil, and he should find out why it's happening rather than assuming that
it's because synthetic oil prevented the rings from seating.

From: Rob Kleinschmidt on 9 Oct 2009 01:46
On Oct 8, 7:01 pm, "J. Clarke" <jclarke.use...(a)cox.net> wrote:
> Rob Kleinschmidt wrote:
> > On Oct 8, 5:26 pm, "Stephen Cowell" <stephenleeNOSPAMcow...(a)gmail.com>
> > wrote:
> >> I've got a buddy
> >> that *had* to have Mobil1 installed before he took delivery...
> >> his bike puffs white smoke when he gets on it, still, after
> >> three years.
>
> > Good point. I suppose "new Dnepr" isn't really an
> > oxymoron after all. I don't particularly believe synthetic
> > damages seals though.
>
> Not so much damages as they don't respond the same way.  

> one of the objectives in formulating different motor oils
> is to produce the same degree of swelling in common seal materials.  If an
> oddball material is used then going to a synthetic lubricant might swell it
> more or less than it is supposed to resulting in either a too tight or too
> loose seal.

Common explanation seems to be early synthetics may have
had problems but current generation don't.

http://www.popularmechanics.com/automotive/how_to/4213451.html

> As for rings not seating right, depends on the oil and the design of the
> engine--some exotic cars come with synthetic these days.

I recall going through at least one grade of lighter oil
followed by one oil change of dino before going to synthetic.
On an air cooled engine though, I wouldn't run anything else
and yeah right from the factory on some not so exotic newer
engines too I think.

> If the guy's bike puffs _white_ smoke when he starts it, that's coolant, not
> oil, and he should find out why it's happening rather than assuming that
> it's because synthetic oil prevented the rings from seating.

Common advice I've heard for new rings is "ride it like you
stole it".

I'd probably try synthetic on a Dnepr myself. Works fine on my
fairly similar '80s era BMW airhead.

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