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is it junk or not ?
Posted: Fri Mar 23, 2001 1:01 am
by pete1965@pacbell.net
Ok, my 1st post "Scraped foot pegs" was a joke, this is not.
I am in the process of getting the valves done at the machine shop
and
brought my cylinder bore in as well. It appears that the previous
owner (according to the machinest) let it sit for a while and as a
result the cylinder wall was damaged. Most likely by the rings
oxidizing against the cylinder wall. Anyways, the machine shop
recommends boring to 1 size over, and as a result I need to get a new
piston. Any recommendations on sources ? Also, the reason I took it
apart was not only the copious amounts of blue smoke from the exhaust
indicating ring wear (figured may as well get the valves done as
well), but a distinct "tink" in time with the cylinder. I stop short
of calling it a "knock" because it was not that severe. The kind of
"tink" that makes you whack the breaks, pull over and say "oh shit,
what the hell is that?". It did not manifest itself upon first
starting, but about 5-10 seconds after it started. I assume it was
piston slap due to severe ring (??) wear but am now questioning the
clearance between the wrist pin and the upper part of the connecting
rod as the source of the noise. The center of the wrist pin is
.94420"
(+/- .00005)and I will replace it with a new one, but wondering if
the wrist pin / connecting rod clearance is out of spec, and if this
is the case do I just light the thing on fire and buy another one,
cause I'd rather do that than tear into the lower part of the motor.
Quite honestly, I have never done it before, but am pretty sure I
don't want to.
Pete
is it junk or not ?
Posted: Fri Mar 23, 2001 7:24 am
by garagedoor79@hotmail.com
> oxidizing against the cylinder wall. Anyways, the machine shop
> recommends boring to 1 size over, and as a result I need to get a
new
> piston.
Can you bore out a KLR jug? As I understood it, the KLR uses nikasil
sleeves, and you just buy a new sleeve based on the next size needed,
with a matching oversize piston as well. No biggy either way, since
I hope I'm ages away from having to think about a job like this.
FWIW
Karl
is it junk or not ?
Posted: Fri Mar 23, 2001 8:24 am
by Ted Palmer
garagedoor79@... wrote:
[...]
> Can you bore out a KLR jug?
A normal oversize amount, yes.
> As I understood it, the KLR uses nikasil
> sleeves, and you just buy a new sleeve based on the next size needed,
> with a matching oversize piston as well. No biggy either way, since
> I hope I'm ages away from having to think about a job like this.
Only a normal ferrous wet sleeve in there, AFAIK.
You could bore a 650 sleeve bigger than factory max, but then the
factory doesn't make a piston bigger than 1mm oversize anyway,
so that limits choices a bit.
If someone really needs a much bigger bore (I'm considering going to
650 bore size in my KLR600) then the stock sleeve might get too
thin, which could lead to bore flex, reduced gas sealing and
possibly bore cracking from fataigue.
A custom sleeve into a bored out block would be the only truly
reliable way to go.
The KLX650 series uses "Electrofusion" coating on their bore.
The KLX650 shop manual even tells us how the coating is done:
"Electrofusion is a steel-molybdenum manufacturing treatment of the
cylinder bore. The process involves using high voltage to alternately
explode thin high-carbon steel wires and thin molybdenum wires directly
inside the aluminium cylinder bore."
Bores that are nikasil'd or electrofusioned generally are not
sleeved. These coatings are used to eliminate the sleeve by
putting a hard surface directly on the alloy bore.
Mister_T
is it junk or not ?
Posted: Fri Mar 23, 2001 8:44 am
by Claes Borovac
Is not this only done on the R model, the competition version? Not the C
model, the "road" version.
Claes, a swede in Dublin.
-----Original Message-----
From: Ted Palmer [mailto:tedp@...]
Sent: 23 March 2001 14:13
To:
DSN_klr650@yahoogroups.com
Subject: Re: [DSN_klr650] Re: Is it Junk or Not ?
garagedoor79@... wrote:
[...]
> Can you bore out a KLR jug?
A normal oversize amount, yes.
> As I understood it, the KLR uses nikasil
> sleeves, and you just buy a new sleeve based on the next size needed,
> with a matching oversize piston as well. No biggy either way, since
> I hope I'm ages away from having to think about a job like this.
Only a normal ferrous wet sleeve in there, AFAIK.
You could bore a 650 sleeve bigger than factory max, but then the
factory doesn't make a piston bigger than 1mm oversize anyway,
so that limits choices a bit.
If someone really needs a much bigger bore (I'm considering going to
650 bore size in my KLR600) then the stock sleeve might get too
thin, which could lead to bore flex, reduced gas sealing and
possibly bore cracking from fataigue.
A custom sleeve into a bored out block would be the only truly
reliable way to go.
The KLX650 series uses "Electrofusion" coating on their bore.
The KLX650 shop manual even tells us how the coating is done:
"Electrofusion is a steel-molybdenum manufacturing treatment of the
cylinder bore. The process involves using high voltage to alternately
explode thin high-carbon steel wires and thin molybdenum wires directly
inside the aluminium cylinder bore."
Bores that are nikasil'd or electrofusioned generally are not
sleeved. These coatings are used to eliminate the sleeve by
putting a hard surface directly on the alloy bore.
Mister_T
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is it junk or not ?
Posted: Fri Mar 23, 2001 12:52 pm
by Krgrife@aol.com
In a message dated 3/23/01 5:25:20 AM Pacific Standard Time,
garagedoor79@... writes:
<<
Can you bore out a KLR jug? As I understood it, the KLR uses nikasil
sleeves, and you just buy a new sleeve based on the next size needed,
with a matching oversize piston as well. No biggy either way, since
I hope I'm ages away from having to think about a job like this. >>
No, it is not nikasil and can be bored.
Kurt Grife
nklr jennifer's lessons/cartman/supertrapp
Posted: Fri Mar 23, 2001 10:35 pm
by Jerry Jackson
Scott, coincidentally I just finished installing my Supertrapp. Check it out
at:
http://www.jcj.net/klr/supertrapp_ids2.htm
Jerry in Deltona, FL
-----Original Message-----
From: InWoods13@... [mailto:InWoods13@...]
Sent: Friday, March 23, 2001 6:18 PM
To:
DSN_klr650@yahoogroups.com
Subject: Re: [DSN_klr650] Re: NKLR Jennifer's lessons/Cartman/Supertrapp
My tweet's now loud and noticeable......the Supertrapp thread isn't
exactly
inspiring confidence in my planned fix. Anybody have a number, on the
expected life of a new IDS2...or the EAR series? Thanks
Scott
A14 "thunderdog"