MV poo.

In what way is "locked solid" not a seizure?

 

I realise this marks me down as a mechanical idiot, but I'd always
assumed a "seizure" involved two bits of metal becoming stuck together
that shouldn't be stuck together, not just something caught against
something else, IYSWIM[1]

[1] though I doubt you will SWIM, as it doesn't make full sense to me.

 

In the sense that nothing much was broken and IIRC, I just replaced a
ring. No metal bits welded themselves together.
And the fact that it stopped in rather less than a millisecond
whereas an engine seizure takes a second or so.

Not a lot of difference really.

 

darsy says...

It's when something isn't moving the way it should, for whatever
reason. You can have partial seizures, which is when the piston will
still move in the bore, but the heat damage and resultant once molten
alloy picking up on the side of the piston and bore has made things a
bit tight. The most common type is the heat seizure, where a piston has
overheated through a lack of lubrication and expanded beyond the limits
of the bore. This usually results in bore damage as the rings tend to
take chunks out it when they break, which they inevitably do.

 

http://photobucket.com/albums/v448/mvmonoposto/Swiss Tour 2005/?action=view&current=DSCF0128.jpg


Is this Arona/Stresa area?



--
Steve Parry
K100RS SE & F650
and a 520i SE Touring for comfort


(not forgetting the SK90PY)

http://www.gwynfryn.co.uk

 

Yes, it's Stresa.

 

Thought so, stopped there while on a tour with a KLR600 a few years ago
.....

--
Steve Parry
K100RS SE & F650
and a 520i SE Touring for comfort


(not forgetting the SK90PY)

http://www.gwynfryn.co.uk

 

OK, thanks. Only ever having owned one 2-stroke, which (so far) hasn't
seized, I'm not really up on this subject. Give it time, mind.

 

Funnily enough I had a mate do exactly the same routine when his
GPZ550D1 threw a rod.

Apparently the conrod guy at the factory had his torque wrench on the
wrong setting!


--
Steve Parry
K100RS SE & F650
and a 520i SE Touring for comfort


(not forgetting the SK90PY)

http://www.gwynfryn.co.uk

 

PS at 2 or 300 miles or so ..



--
Steve Parry
K100RS SE & F650
and a 520i SE Touring for comfort


(not forgetting the SK90PY)

http://www.gwynfryn.co.uk

 

darsy says...

Top tip: Always ride with your left hand hovering over the clutch
lever.

When a seizure on a highly tuned stroker occurs, the bike will suddenly
go like stink, then start to feel sluggish almost immediately. That's
the time to whip the clutch in, hit the kill switch and coast to the
side of the road or track. Leave it to cool right down before doing
anything, don't try to ride it away after a couple of minutes. 9 times
out of 10 there's been a lubrication failure, or cooling problem. Look
right over the cooling and lube sytem before blaming anything else, and
then look at the pistons/barrels to see if you can get away with not
fitting new pistons and reboring/replating.

Lean jetting usually shows itself by melting a hole in the top of a
piston, as does timing being out. When this happens you may still have
to strip the engine as bits of molten alloy will have got into the big-
ends and main bearings.

 

<snip>


That's a habit I still have from my RD days


--
Steve Parry
K100RS SE & F650
and a 520i SE Touring for comfort


(not forgetting the SK90PY)

http://www.gwynfryn.co.uk

 

Luvverly. We stayed over t'other side of the "hill" on Como at a
similarly gorgeous place, Bellagio.

 

2-strokes: blame the East Germans.

 

Certainly my experience.

 

Think Morris Minor with a column change and Vauxhall Chevette plastic
interior but smaller and noisier.

Many phenomenal 'design' features. Fuel filler above a hot engine, no
fuel gauge (dipstick), 20L jerry can in the boot when full impossible to
get out and a special hand scarifying feature if you cock up a gear
change when a tram is bearing down on you.