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Author Topic: 1990 lt250r burning tranny fluid  (Read 1515 times)

Offline 90lt250rnoob

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1990 lt250r burning tranny fluid
« on: November 09, 2015, 12:14:43 pm »
Hey guys my 1990 lt250r I'm pretty sure is burning my tranny fluid. The amount of spooge is rediculous. All over the Frame motor and swing arm. I'm pretty sure it's the crank seal but do you have to pull the motor out and split the cases. What do you do?
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Offline Gillio

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Re: 1990 lt250r burning tranny fluid
« Reply #1 on: November 09, 2015, 01:25:25 pm »
nope you can replaced the seals without pulling the motor
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Offline 90lt250rnoob

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Re: 1990 lt250r burning tranny fluid
« Reply #2 on: November 09, 2015, 01:27:24 pm »
Is there any how to guides on this that you know of?
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Offline Fateofnorns

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Re: 1990 lt250r burning tranny fluid
« Reply #3 on: January 31, 2016, 02:23:00 pm »
Not to hijack this thread, but related enough to post here rather than start a new thread:

I too have a bunch of black stuff leaking out of the exhaust area onto the frame an front of the engine. I've replaced the seals on this bike twice, one with some cheap seals and then with some higher quality winderosa  seals with no real difference. I even changed out the o-rings on some of the collars, etc...

What else could be causing this is not the engine seals?

Also, to answer thread starter's last question, you can find schematics for your engine in the Clymer repair manual, or if you go to an ATV web store like www.rockymountainatv.com and go to "OEM Parts" you can find schematics under your bike's make & model.
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Offline Rainman56

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Re: 1990 lt250r burning tranny fluid
« Reply #4 on: February 01, 2016, 05:41:09 am »
Quote from: Fateofnorns on January 31, 2016, 02:23:00 pm
Not to hijack this thread, but related enough to post here rather than start a new thread:

I too have a bunch of black stuff leaking out of the exhaust area onto the frame an front of the engine. I've replaced the seals on this bike twice, one with some cheap seals and then with some higher quality winderosa  seals with no real difference. I even changed out the o-rings on some of the collars, etc...

What else could be causing this is not the engine seals?

Also, to answer thread starter's last question, you can find schematics for your engine in the Clymer repair manual, or if you go to an ATV web store like www.rockymountainatv.com and go to "OEM Parts" you can find schematics under your bike's make & model.

What pipe are you running?I have black crap below the exhaust port due to the exhaust pipe to collector connection.Its simply some spoogeleakage from the exhaust.Some of the high end pipes use O-rings on the connection to eliminate it.Or you can reaseal the slip on connection styles with orange high temp silicone but will likely still leak some.
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Offline Fateofnorns

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Re: 1990 lt250r burning tranny fluid
« Reply #5 on: February 01, 2016, 04:21:59 pm »
Okay that makes sense then. I'm running an ancient FMF Gold Series pipe on the bike. As long as I'm not burning transmission oil then it's no big.

Thanks.
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Offline El Diablo

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Re: 1990 lt250r burning tranny fluid
« Reply #6 on: February 01, 2016, 10:17:41 pm »
Quote from: Fateofnorns on February 01, 2016, 04:21:59 pm
Okay that makes sense then. I'm running an ancient FMF Gold Series pipe on the bike. As long as I'm not burning transmission oil then it's no big.

Thanks.

If your flange is removable from the main body of the pipe, you may be able to have grooves machined around the outside circumference to accept O-rings to help eliminate or at least reduce the oil blow through.
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Brian
1988 Suzuki LT-250R (The HPR test mule)
1987 Suzuki LT-500R
1990 Suzuki LT-500R
1982 Honda ATC-185S
1982 Honda ATC-250R

Offline All American

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Re: 1990 lt250r burning tranny fluid
« Reply #7 on: February 02, 2016, 05:44:31 am »
My 85' also leaks out that black sponge stuff.  I installed new springs, and the Orange high temp stuff.  It still slowly builds up black residue.  I just accepted it and didn't know my FMF on there could be oringed.  BUT THEN AGAIN, IM WAITING IN LINE FOR AN FTZ PIPE!  I can't wait till they start making them again. ;D +k2  (Y)
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Offline Fateofnorns

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Re: 1990 lt250r burning tranny fluid
« Reply #8 on: February 03, 2016, 02:44:39 pm »
Know where I can find a machine shop in Y-town?
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Offline Fateofnorns

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Re: 1990 lt250r burning tranny fluid
« Reply #9 on: February 03, 2016, 02:45:46 pm »
Quote from: All American on February 02, 2016, 05:44:31 am
My 85' also leaks out that black sponge stuff.  I installed new springs, and the Orange high temp stuff.  It still slowly builds up black residue.  I just accepted it and didn't know my FMF on there could be oringed.  BUT THEN AGAIN, IM WAITING IN LINE FOR AN FTZ PIPE!  I can't wait till they start making them again. ;D +k2  (Y)

I'm thinking it could maybe be my power valve? I don't know, it doesn't seem to cause any problems.
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Offline El Diablo

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Re: 1990 lt250r burning tranny fluid
« Reply #10 on: February 04, 2016, 06:53:25 pm »
Quote from: Fateofnorns on February 03, 2016, 02:44:39 pm
Know where I can find a machine shop in Y-town?

Precision Electric & Machining on the corner of Pacific Ave & 16th Street.
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Brian
1988 Suzuki LT-250R (The HPR test mule)
1987 Suzuki LT-500R
1990 Suzuki LT-500R
1982 Honda ATC-185S
1982 Honda ATC-250R
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