YZ250 Smoke, Gas & Oil
Schmoe
CRF230 for him yesterday to replace the outgrown CRF100 so he's happy to get
out and the wife seems happy enough to have the 100 to herself for the
moment.
After riding, brought my YZ250 up on the trailer, engine running, fuel shut
off to drain and notice smoke pouring out of the breather with steady drip
of gas. Shut her down and drove home. When I got home, notice some oil
dropped on the trailer, ahead of the breather tubes from somewhere under the
crankcase. Damn. Something clogged?
Any ideas?
Thanks.
Dean H
Not sure about the smoke and drip. Although, there was that weekend in
Vegas.
If the stuff on the trailer is black like spooge, maybe it's from a
powervalve vent?
-Dean
just guessing
Schmoe
news:6bc71f44-c811-450a...@p14g2000yqj.googlegroups.com...
On Jul 16, 1:51 pm, "Schmoe" <s...@s.net> wrote:
> Finished a nice ride today with the wife & 14 year old. I picked up an '03
> CRF230 for him yesterday to replace the outgrown CRF100 so he's happy to
> get
> out and the wife seems happy enough to have the 100 to herself for the
> moment.
>
> After riding, brought my YZ250 up on the trailer, engine running, fuel
> shut
> off to drain and notice smoke pouring out of the breather with steady drip
> of gas. Shut her down and drove home. When I got home, notice some oil
> dropped on the trailer, ahead of the breather tubes from somewhere under
> the
> crankcase. Damn. Something clogged?
>
> Any ideas?
>
> Thanks.
>Not sure about the smoke and drip. Although, there was that weekend in
>Vegas.
I remember that weekend. Good one.
>If the stuff on the trailer is black like spooge, maybe it's from a
>powervalve vent?
Nope, it's oil, clean from a relatively recent change.
sturd
> Nope, it's oil, clean from a relatively recent change.
Transmission oil? You've probably got a leaky main seal if so.
Go fast. Take chances.
Mike S.
Schmoe
news:ce0850b8-4f77-4bcf...@t7g2000vbv.googlegroups.com...
> Schmoe reports:
>
>> Nope, it's oil, clean from a relatively recent change.
>
> Transmission oil? You've probably got a leaky main seal if so.
Would that cause the pressure blow back and the white smoke out of the
breather along with dripping gas? Doesn't it sound more like something's
clogged causing engine pressure? Could be tranny oil but it wasn't really
red colored, more like engine oil color.
Dean H
> red colored, more like engine oil color.
Could it be premix that has all the fuel evaporated out of it, leaving
only 2stroke oil? Leaky fuel system?
HardWorkingDog
wrote:
> Could be tranny oil but it wasn't really
> red colored, more like engine oil color.
"I think that word does not mean what you think it does." --the
Princess Bride
There are 2 oils used in 2 strokes--the "engine oil" that lubricates
the piston/ring/cylinder/crankshaft is the premix oil that's added to
the gas.
The transmission oil is what lubricates the, well, transmission, and
sits in the bottom of the engine case, and is what you drain out &
refill on a regular basis.
You probably use some kind of honey-colored oil in your transmission,
and that's likely what you're seeing. No help on how it's getting out
of the transmission though...
--
Charles
'99 YZ250
Schmoe
Sorry, should have mentioned, it's a YZ250FV 4 stroke.
Dean H
> "Dean H" <dfhy...@optonline.net> wrote in message
Well that's blue horse of a different color.
Your bike is leaking trendiness. Nothing to do but ride it hard.
(just kidding, I have no clue)
HardWorkingDog
wrote:
> Sorry, should have mentioned, it's a YZ250FV 4 stroke.
that's inconceivable
:)
--
Charles
'99 YZ250
"It's bad luck just SEEin' a thing like that..."
Tiago
> "Dean H" <dfhy...@optonline.net> wrote in message
When I first saw the problem I thought "well, a 4 stroke do that when
the crankcase is overfilled with oil, but 2 stroke, well..."
You know, in 4 stroke engines, the combustion gasses can go past the
rings and reach the crankcase. That's normal and more gas go through
the more worn the engine is, but mind, even brand new engines has this
"gas seeping" - sorry, can't come with a better term. If you fill with
too much oil, the excess will be thrown through the breather vent. I'm
not familiar with the YZ engine in particular, but years ago, before
all this eco and polution concerns, the breather was just a tube from
the crankcase to the open air (I had a bike like this a NX200 - yeah,
not the 250). Now, the pollution concerns forced the breather to go to
the air box. I think all street bikes are like this nowadays. Have you
seen air boxes full of oil? From the air box there is usually a drain
tube. On my XR250, this tube was split in a "T", where one end went
up, under the seat and was open to the air, while the other end went
down the bike but was plugged. After a few months, this tube fill with
oil and is part of the normal maintenance to remove the plug and
collect the thick, smelly oil that accumulates. Of course, dragging
the bottom of the bike against rocks ripped the plug. I guess it's
lying under a rock in one of the trails I rode. You said clean oil and
I instantly thought "crankcase overfill"... btdt.
:)
-- Tiago
Tiago
> I instantly thought "crankcase overfill"... btdt.
Just one more thing:
if your engine is flooding constantly, the problem gets much much
worse, because the excess fuel will end up on the crankcase, help
filling it even more.
-- Tiago
sturd
> Sorry, should have mentioned, it's a YZ250FV 4 stroke.
Oh, well then. Nevermind.
Tiago is probably on the right track though.
Schmoe
news:825df081-3947-4fa3...@en1g2000vbb.googlegroups.com...
Just one more thing:
Thanks, I think this last comment could be closer to it. The bike does
flood when hot. If the bike stalls during a ride and I don't immediately
kick her back on, it's a ROYAL P.I.T.A. to get her re-started. Often, I
have to wait 5-10 minutes, even using the hot start lever to allow more air
in.
That said, when this incident/issue occurred, the bike had been running
normal at the end of the ride, put up on the trailer running, fuel valve
shutoff to run gas out of the carb. I haven't run the bike since but maybe
I'll run it tonight and see if it happens again. I'll also check the relief
hoses. There are about 5 or 6 of them, all coming down the same area behind
the engine & below.
dsc-ky
> "Tiago" <diariodastril...@gmail.com> wrote in message
I just had an incident where my 06 300 KTM would not start after
installing a new full dc conversion ignition system. Trouble shot many
things with the new ignition and it checked out perfect and I did have
spark. Left me scratching my head for a couple of weeks. When I
finally got back to working on it, I pulled the carb and reeds to have
a look. Reeds fine. Carb had been spilling gas all over the place. I
noticed that the reeds seemed to have water on them and I could see a
watery mix on the crank weights. So I put hose down in the cases and
pulled back on the syringe. I got a nasty mix of water/gas/oil.
Repeated until empty, filled with fresh gas and emptied about 3 or 4
more times. Put 4 ounces of premix back into the cases. Reinstalled
the reeds, opened the carb, checked the float... could not shut off
the flow. I don't know what happened to make the floats off, but I
reset it and reinstalled the carb. Bike fired on the first kick and I
rode it around the yard... smoked like hell for a while from the extra
pre-mix but ran fine. So if your cases are full of something even gas,
it may not light off? I think it kills the flow of air or something.
If it does light off full of gas... that could be a bad thing.
Scrape
news:4e282b25$0$25188$a826...@newsreader.readnews.com:
> Often, I have to wait 5-10 minutes, even using the hot
> start lever to allow more air in.
YZ250s don't have a hot start lever. Is this a 4S?
Dean H
> > Often, I have to wait 5-10 minutes, even using the hot
> > start lever to allow more air in.
>
> YZ250s don't have a hot start lever. Is this a 4S?
yeah, he fordot to mention that.
It's a YZF, not a YZ.
That's what the world has come to after this period of four stroke
flatulence.
I was calling Honda dealers looking for jets and needles the other
day.
"What model do you have?"
"Well, it's a GasGas, but it uses the same carb as a lot of CR250's"
"It's a what what?"
"GasGas. Spanish. But really, it uses a CR250 carb"
"A what?"
"CR 250"
"Two Stroke?"
"Yes, a CR 250 is a two stroke"
"oh, we'd have to order those, and there are lots of choices so we
need to know your model."
<fizzle> "Ok then, thanks." click
it gets harder and harder to support brick and mortar.
HardWorkingDog
Scrape <noth...@domain.com> wrote:
Y'all just need to put the tools down and watch The Princess Bride.
Dean H
> Y'all just need to put the tools down and watch The Princess Bride.
Have fun storming the castle!
dsc-ky
>
> yeah, he fordot to mention that.
That's a good way to get a lot of useless answers... :)
Scrape
1f191c...@n35g2000yqf.googlegroups.com:
> <fizzle> "Ok then, thanks." click
> it gets harder and harder to support brick and mortar.
The one that lights me up every time is, "no, we don't have that, but we
can order it for you."
You know, *I* can order it. And have it here cheaper and on my doorstep in
two days. I try, seriously, to support the local guys.
The three shops closest to me have shut their doors in the last year or so.
The Yamaha dealer that moved from a great, perfectly functional building to
a monstrosity of a shop with a spiral stair case up to the Aprilia display
upstairs and the separate shiny repair shop, to the Honda dealer with the
indoor waterfall, to the Kawasaki/Suzuki shop that had nothing fancy going
for it.
None of them ever had a part I needed and all sold accessories/gear at MSRP
plus. They all had a fair selection of bikes - selling for about $1K more
than I could get any of them for anywhere else.
Scrape
@news.individual.net:
> Y'all just need to put the tools down and watch The Princess Bride.
Good movie.
Dean H
>
> > <fizzle> "Ok then, thanks." click
> > it gets harder and harder to support brick and mortar.
>
> The one that lights me up every time is, "no, we don't have that, but we
> can order it for you."
>
> You know, *I* can order it. And have it here cheaper and on my doorstep in
> two days.
Or, I've gotten this one too much.
"No, I don't have that in stock. I haven't sold one in 32 months."
Really? How many did you NOT sell in the last 32 months?
Scrape
Excellent.
I've gotten the "I've never sold one of those."
My reply: "I've bought four elsewhere because you didn't have them."
That was for a throttle tube for a YZ250F that fit countless different
bikes.
The Yamaha shop mentioned in the previous post that shut down didn't
have an air filter, OEM or aftermarket, for a YZ250F. Interesting thing
about that is the same f'ing air filter fit 107 different Yamahas at
that time. I understand not keeping every part for every bike. But one
single part number that fit all full size bikes for over a decade???
When I managed record stores back in the 80s, we kept a "lost sales"
sheet. And we ordered from it. These guys are relying too much on low
paid workers and software that doesn't do what it should.
The Real Bev
> The three shops closest to me have shut their doors in the last year or so.
> The Yamaha dealer that moved from a great, perfectly functional building to
> a monstrosity of a shop with a spiral stair case up to the Aprilia display
> upstairs and the separate shiny repair shop, to the Honda dealer with the
> indoor waterfall, to the Kawasaki/Suzuki shop that had nothing fancy going
> for it.
>
> None of them ever had a part I needed and all sold accessories/gear at MSRP
> plus. They all had a fair selection of bikes - selling for about $1K more
> than I could get any of them for anywhere else.
Long ago there was Bert's motorcycle wrecking yard in Monrovia. Dark,
dirty, lots of parts piled all over and you could generally get at least
an approximation of what you needed. Fast-forward 20 years and it's a
huge multi-brand dealership and the part I liked is a parking lot.
Feh.
--
Cheers, Bev
When you wish upon a falling star your dreams can come true. Unless
it's really a meteorite hurtling to the earth which will destroy all
life. Then you're pretty much hosed no matter what you wish for.
Unless it's death by meteor. --Demotivators
Scrape
news:j0hil9$kt8$1...@dont-email.me:
> Long ago there was Bert's motorcycle wrecking yard in Monrovia. Dark,
> dirty, lots of parts piled all over and you could generally get at
> least an approximation of what you needed. Fast-forward 20 years and
> it's a huge multi-brand dealership and the part I liked is a parking
> lot.
There's no excuse for a modern shop to not carry commonly used/replaced
parts.
Schmoe
news:Xns9F2B5A9A240E2s...@216.168.3.70...
Mine does. '06 YZ250FV
Schmoe
news:5d53397a-ac54-435e...@r28g2000prb.googlegroups.com...
> > YZ250s don't have a hot start lever. Is this a 4S?
>
> yeah, he fordot to mention that.
>That's a good way to get a lot of useless answers... :)
My bad I guess. I thought being an '06 precluded it being a 4 stroke. Did
they still make the YZ250 2's that year?
sturd
> My bad I guess. I thought being an '06 precluded it being a 4 stroke. Did
> they still make the YZ250 2's that year?
They still sell YZ250 two strokes *this* year.
Scrape
They still make and sell them in the US today.
Scrape
That makes it a YZ250F, not a YZ250. Completely different bike.
Dean H
>
> They still make and sell them in the US today.
And I want one.
The Real Bev
> The Real Bev<bashl...@gmail.com> wrote:
>
>> Long ago there was Bert's motorcycle wrecking yard in Monrovia. Dark,
>> dirty, lots of parts piled all over and you could generally get at
>> least an approximation of what you needed. Fast-forward 20 years and
>> it's a huge multi-brand dealership and the part I liked is a parking
>> lot.
>
> There's no excuse for a modern shop to not carry commonly used/replaced
> parts.
Long ago (35 years?) I needed a smaller main jet for my 1960 Ducati
dell'orto carb. The local Ducati dealer(possibly the only one in
California) sent me to a guy who ran a motorcycle dealership in San
Marino (a lot like Beverly Hills, except newer) out of his and his
next-door grandma's garage and yard. You aren't even allowed to give
piano lessons in San Marino. The guy had the exact jet I needed.
In the dealer's defense, there weren't a lot of Ducatis or MotoGuzzis
around then.
--
Cheers, Bev
=-=-=-=-=-=-=-=-=-=-=-=
SAVE GAS, FART IN A JAR
Scrape
email.me:
>> There's no excuse for a modern shop to not carry commonly used/replaced
>> parts.
>
> Long ago (35 years?) I needed a smaller main jet for my 1960 Ducati
> dell'orto carb. The local Ducati dealer(possibly the only one in
> California) sent me to a guy who ran a motorcycle dealership in San
> Marino (a lot like Beverly Hills, except newer) out of his and his
> next-door grandma's garage and yard. You aren't even allowed to give
> piano lessons in San Marino. The guy had the exact jet I needed.
>
> In the dealer's defense, there weren't a lot of Ducatis or MotoGuzzis
> around then.
And you're still going to have the same problem finding Dell'orto parts...
Fortunately, there's a Mikuni conversion kit for a lot of them.. Or at
least some of them.
john
> Long ago (35 years?) I needed a smaller main jet for my 1960 Ducati
> dell'orto carb. The local Ducati dealer(possibly the only one in
> California) sent me to a guy who ran a motorcycle dealership in San Marino
> (a lot like Beverly Hills, except newer) out of his and his next-door
> grandma's garage and yard. You aren't even allowed to give piano lessons
> in San Marino. The guy had the exact jet I needed.
piano vs. bikes??
well it's like peta people will throw paint on
old ladies wearing fur coats, but would not
dare try that in a biker bar...
The Real Bev
> "The Real Bev"<
>> Long ago (35 years?) I needed a smaller main jet for my 1960 Ducati
>> dell'orto carb. The local Ducati dealer(possibly the only one in
>> California) sent me to a guy who ran a motorcycle dealership in San Marino
>> (a lot like Beverly Hills, except newer) out of his and his next-door
>> grandma's garage and yard. You aren't even allowed to give piano lessons
>> in San Marino. The guy had the exact jet I needed.
>
> piano vs. bikes??
No commercial enterprises at all in the residential neighborhood.
Businesses were confined to a short stretch of a really wide main
highway through town, and they were definitely low-key. Lawyers,
doctors, small restaurants, small dress shops. No supermarkets
(fortunately there were big ones on the edge of town so the servants
didn't have to drive very far) or large retail establishments of any sort.
Patton grew up here (former family hme is on Patton Way, and it's not
all that opulent) and it's where the Huntington Library lives. If
anybody passes through Pasadena I'll take you on a free tour.
> well it's like peta people will throw paint on
> old ladies wearing fur coats, but would not
> dare try that in a biker bar...
--
Cheers, Bev
oooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooo
People are more violently opposed to fur than leather because it's
safer to harass rich women than motorcycle gangs. --Unknown