CR125R Exhaust Oil Spooge Leaking - HELP

chevywaldo
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158
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10/12/2013
Location
Roselle, IL US
Edited Date/Time 7/4/2015 1:33am
take a look at the photos. This is after riding the bike for about 30-60 minutes. Not racing, just recreational motocross. This is a 2001. The oil spooge drips out of the silencer onto the swingarm. The engine was rebuilt by a pro 2 years ago. I put another new piston in it just a few months ago. I rode it earlier today. I have owned the bike for 4 years. It has "ALWAYS" done this, even before the engine rebuild. I recently rejetted the carb main jet and pilot jet. That made it run better. I downsized them both 1 size from factory specs (leaner) a couple months ago. The bike runs very good at high rpm. Lots of power at high rpm (crazy fast), but at low and mid rpm - very little power. I'm running 32:1. The exhaust power valve works fine. I never changed the silencer packing - I'm sure it's full of oil, but that's likely not the problem - I'm sure it's a carb or tuning or fuel issue? Don't know. I'm looking for someone who had the same problem and learned how to fix it.

thanks. Lee






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RonSkj
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Radiator Springs, CA US
Fantasy
6/20/2015 4:20pm Edited Date/Time 6/20/2015 4:23pm
I would just put a catch can under the silencer and reuse the oil. You could save alotta coin!
TailSoHard
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Beer City, MI US
6/20/2015 4:24pm
I'm just here cause the word "spooge" made me laugh Laughing
731chopper
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DFW, TX US
6/20/2015 4:36pm
What ratio are you mixing your gas at? What premix oil are you using? You need to repack the silencer. Ride the bike on the pipe more. If you lug the motor on a 2 stroke it can do this a little but nothing like what you're showing in your photo. That is ridiculous.
MxKing809
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Big Sand Whoops, MI US
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6/20/2015 4:51pm
Define 'rebuilt by a pro'..... I know alot of pro riders I wouldn't let touch my bike. I also know some professional dishwashers, ditch diggers, and concrete masons that think they're chad watts.....

The Shop

6/20/2015 4:57pm
That's mostly a throttle position issue, not enough of it.
yzjs7
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Antioch, CA US
6/20/2015 4:58pm
Repack the muffler. My 01yz did the same thing. Nothing is wrong with your bike, plus your mixing a strong oil to gas ratio. Maybe try leaning it out a bit.
KLX650C
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Carmichael, CA US
6/20/2015 5:33pm
Holy crap that's like the exxon valdez. After you rejetted you need to clean that can out and repack to see if it stops
6/20/2015 6:05pm
try 40:1 and use Motul 800.
hillbilly
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Afton, TN US
6/20/2015 6:18pm
it is the crank seal on the clutch side pulling tranny oil into the crankcase.

you notice lesd oil when changing tranny fluid?
hillbilly
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Afton, TN US
6/20/2015 6:22pm
make sure the case vent tube is clear ,if plugged it will build pressure in tranny and push oil thru seals,crank included.
Coyote
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Santa Cruz, CA US
6/20/2015 6:46pm
TailSoHard wrote:
I'm just here cause the word "spooge" made me laugh Laughing
definitely not used in the appropriate terminology...lmao!!!
Spartacus
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6/20/2015 7:22pm
EPA super fund clean-up site.
BobPA
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PA US
6/20/2015 7:30pm
hillbilly wrote:
it is the crank seal on the clutch side pulling tranny oil into the crankcase.

you notice lesd oil when changing tranny fluid?
That what I was thinking, but they usually blubber pretty bad at high RPM when the tranny seal is bad.
theToothPerry
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Santa Clarita, CA US
6/20/2015 7:39pm
32:1 is perfect for 125s if ridden properly. If bogged and trail ridden, 32:1 would probably load it up. Try 40:1 but you might have to adjust the airscrew to compensate.
chump6784
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AU
6/20/2015 8:00pm
Run 40:1 with a good quality oil and twist the throttle further. My wife's rm 125 looked like that but not as bad
EMA884mx
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Midland, TX US
6/20/2015 8:08pm
That seat cover is from a stock 2000 CR125R, not a 2001. Nit picky, but I know that's not a 2001 CR.
Tiki
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6/20/2015 8:12pm
That's mostly a throttle position issue, not enough of it.
This is a large part of the problem.
hillbilly
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Afton, TN US
6/20/2015 8:48pm
hillbilly wrote:
it is the crank seal on the clutch side pulling tranny oil into the crankcase.

you notice lesd oil when changing tranny fluid?
BobPA wrote:
That what I was thinking, but they usually blubber pretty bad at high RPM when the tranny seal is bad.
depends on how bad i guess,may be why it is crazy fast,sucking a little air if he hasnt checkedvtranny level and there is little oil.

going down a main and it still does that,but revs good,

honda have a case gasket ?
FGR01
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6/20/2015 8:52pm
Resist the urge to use less oil.

Spooge is not caused by too much oil. It's caused by combustion temps that are too low to burn the oil that is there. And low combustion temps are primarily caused by jetting that is too rich for the riding you are doing.

You need to clean and repack your silencer and get all the oil out of the pipe and ideally clean your power valve as well. Then you can start trying to get it jetted correctly. Your silencer packing is so full of oil right now that thing will be spooging for the next decade no matter what you change.

Certain fuels and oils are more prone to spooge. Pump gas is usually pretty bad and oils with a high flash point are less likely to burn completely.
6/20/2015 8:55pm
First, I would try finding out what is causing the spooge. Then the best approach is to fix it as much as possible. It might be caused by the mix ratio or the jetting.
hillbilly
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Afton, TN US
6/20/2015 9:06pm
the crank could have a groove in it where the seal rides and leak just enuff tranny oil.

i would have to dip my finger in it and smell to tell you if its 2str oil or out the gear box.

FIREfish148
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Kirkland, WA US
6/20/2015 9:11pm
I used to have the exact same bike and it did the exact same thing. 'Till I learned to turn the trottle all the way.
Cygnus
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Hanover, CO US
6/20/2015 9:15pm
Is the rubber grommet between the pipe and silencer there?
6/20/2015 9:19pm
FGR01 wrote:
Resist the urge to use less oil. Spooge is not caused by too much oil. It's caused by combustion temps that are too low to burn...
Resist the urge to use less oil.

Spooge is not caused by too much oil. It's caused by combustion temps that are too low to burn the oil that is there. And low combustion temps are primarily caused by jetting that is too rich for the riding you are doing.

You need to clean and repack your silencer and get all the oil out of the pipe and ideally clean your power valve as well. Then you can start trying to get it jetted correctly. Your silencer packing is so full of oil right now that thing will be spooging for the next decade no matter what you change.

Certain fuels and oils are more prone to spooge. Pump gas is usually pretty bad and oils with a high flash point are less likely to burn completely.
This^. I would definitely repack the silencer. But the low combustion temps might be due to riding style. Maybe try to ride a gear low? Like you have noticed, the power is in the high revs so keep the motor there. I had a similar problem with my first two stroke bike, riding it on the top of the revs solved it fairly quick, and sounds awesome.
MR. X
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North Tonawanda, NY US
6/20/2015 9:31pm
hillbilly wrote:
the crank could have a groove in it where the seal rides and leak just enuff tranny oil. i would have to dip my finger in...
the crank could have a groove in it where the seal rides and leak just enuff tranny oil.

i would have to dip my finger in it and smell to tell you if its 2str oil or out the gear box.

i would have to dip my finger in it and smell Reminded me of a girl i used to talk toSick
JRT812
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Cottontown, TN US
6/20/2015 10:26pm
FGR01 wrote:
Resist the urge to use less oil. Spooge is not caused by too much oil. It's caused by combustion temps that are too low to burn...
Resist the urge to use less oil.

Spooge is not caused by too much oil. It's caused by combustion temps that are too low to burn the oil that is there. And low combustion temps are primarily caused by jetting that is too rich for the riding you are doing.

You need to clean and repack your silencer and get all the oil out of the pipe and ideally clean your power valve as well. Then you can start trying to get it jetted correctly. Your silencer packing is so full of oil right now that thing will be spooging for the next decade no matter what you change.

Certain fuels and oils are more prone to spooge. Pump gas is usually pretty bad and oils with a high flash point are less likely to burn completely.
^1
Couldn't agree more. Focus on your jetting, change packaging, and lookat the flashpoint of your oil. A little bit is ok, but that is crazy.
CR250Rider
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Moses Lake, WA US
6/20/2015 11:13pm
I recently cleaned my pipe by emptying a can of easyoff oven cleaner into it and letting it soak for 3 days.. it helped a ton but the spooge is returning. A tenth of what you have tho. I do have rich jetting but my smoker runs cool compared to a 4 stroker
Chu
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GB
6/21/2015 12:10am
Re pack and ride faster.
Stoop
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FJ
6/21/2015 12:12am
just matte black the whole bike, you wont even notice it
6/21/2015 2:51am
FGR01 wrote:
Resist the urge to use less oil. Spooge is not caused by too much oil. It's caused by combustion temps that are too low to burn...
Resist the urge to use less oil.

Spooge is not caused by too much oil. It's caused by combustion temps that are too low to burn the oil that is there. And low combustion temps are primarily caused by jetting that is too rich for the riding you are doing.

You need to clean and repack your silencer and get all the oil out of the pipe and ideally clean your power valve as well. Then you can start trying to get it jetted correctly. Your silencer packing is so full of oil right now that thing will be spooging for the next decade no matter what you change.

Certain fuels and oils are more prone to spooge. Pump gas is usually pretty bad and oils with a high flash point are less likely to burn completely.
JRT812 wrote:
^1
Couldn't agree more. Focus on your jetting, change packaging, and lookat the flashpoint of your oil. A little bit is ok, but that is crazy.
+3 here.

I've dug out my old specs book from back in the day and I had specs for 00' and an 02 model that I never had any issues with. Note these are Australian models running 95 octane (RON). Other than the oxygenated fuels in the US, the specs I read on the net guys in the US run are pretty similar to what I use for other bikes so no need to panic.

2000
350 main (360 stock)
45 pilot (50)
standard 6BEG20-69 in 2nd clip (3rd clip)

2002
360 (400)
standard 32.5 pilot
standard needle in 2nd from 3rd

Pro circuit specs
Standard 380 45 6BEG20-68 in 3rd slide 5 air screw not recorded
Pro Circuit 370 37.5 6BEG20-69 (leaner) in 2nd std slide air screw 1.5

I would go 360 main and 35 pilot or even 32.5 and 6BEG20-69 in 2nd. air screw around 1.5 out. If your pilot is too lean, the bike will be too revvy straight off idle to quarter throttle, and you wont blow it up with too lean a pilot so experiment there all you want and you'll figure it out. The 68 and 69 on the needle is the size of the thicker straight section and affects the bike from about quarter to half throttle, 68 being smaller than the 69 and therefor richer. If you're too lean on the needle you'll loose power through the mid and it will ping under hard load. The clip position affects from quarter to 3 quarter. The main affects from half through to full in conjunction with the taper on the needle, but mostly at full. This setting will be good for anything but drag racing or long track. Put these in and go for a good blast, it will come back smoking from the pipe as all the oil burns off, and after a good days riding and burning, then repack your muffler. Better still, get an after market silencer. I used to run FMF shorty with Fatty pipe to beef the low and mid a little. If all that seems too much, buy and fit a JD jet kit, or pay someone who can jet.The bike will go sooooo much better and is usually better money spent than a pipe.

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