Help trans oil transferring to engine side.. - Honda TRX Forums: Honda TRX 450R Forum
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post #1 of 20 (permalink) Old 10-01-2016, 01:43 AM Thread Starter
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Help trans oil transferring to engine side..

I noticed my tranny oil is transferring to engine side because I drain oil on engine side enough to where it's under the H mark on sight glass, start the bike up for a bit and let it sit for a bit and the sight glass is full. Go to the tranny side and take off bolt to check level and nothing comes out. I've done this 2 times already. What seal do I replace?
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post #2 of 20 (permalink) Old 10-01-2016, 11:56 AM
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Before you do a bunch of work for nothing(possibly) drain transmission completely & then mess with your engine oil level.it takes a while for it all to settle,it could be just messin with your mind bud?
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post #3 of 20 (permalink) Old 10-01-2016, 11:57 AM
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Ask me how I know,with all the $$ we put into them they can make us paranoid hahaaah,keep us posted!
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post #4 of 20 (permalink) Old 10-01-2016, 12:25 PM Thread Starter
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Will test tonight....yeah I might just be going crazy with this bike.
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post #5 of 20 (permalink) Old 10-01-2016, 06:52 PM
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The check bolt if you were to use that as a fill reference would make you overfill the trans by about 1/8 or better of a quart of oil.

I measure it out myself for years now, never an issue. It does take some time for the oil to settle as well when using the sight glass.

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post #6 of 20 (permalink) Old 10-01-2016, 08:55 PM
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On the 06+, transfer from trans to motor is the crank seal installed inside out, normal transfer is from motor to transmission, small amounts is normal.
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2008 TRX 450ER XC racing
FMSQ # 281
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post #7 of 20 (permalink) Old 10-01-2016, 08:57 PM Thread Starter
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I haven't changed out the crankshaft seal since I bought it back in 06. So I will deff check tonight and determine if it's transferring
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post #8 of 20 (permalink) Old 10-01-2016, 08:59 PM Thread Starter
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If I were to install the seal it goes spring outwards?
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post #9 of 20 (permalink) Old 10-02-2016, 12:42 PM
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Any luck ?
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post #10 of 20 (permalink) Old 10-02-2016, 12:43 PM
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Quote:
Originally Posted by gboezio View Post
On the 06+, transfer from trans to motor is the crank seal installed inside out, normal transfer is from motor to transmission, small amounts is normal.
Good one! I just learned something about that seal
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post #11 of 20 (permalink) Old 10-02-2016, 02:38 PM
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Yeah, ask me how I have found out lol
When you rebuild your engine, better check carefully the instructions, 04-05 install reversed from the 06+.
Couldn't pull it out without destroying it.
And now I think it's pushing oil because of blow by

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post #12 of 20 (permalink) Old 10-02-2016, 05:07 PM
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You could also have a bolt missing inside the cases. This is a relatively common problem for kicker motors as it seems the bolt isn't necessary but it literally plugs a hole. If you've just had it apart and it is only just now doing it, the bolt could be your problem.
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post #13 of 20 (permalink) Old 10-02-2016, 06:02 PM Thread Starter
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Did the testing today and it's deff transferring. Drained oil to the half mark of low and high, fill trans side to threads on check bolt. Warmed up bike and oil on engine side went past sight glass. Oil on tranny side went below threads on check bolt.
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post #14 of 20 (permalink) Old 10-02-2016, 10:37 PM Thread Starter
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This was the seal I took off... just the metal was left!! Replaced it and good to go.
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post #15 of 20 (permalink) Old 10-03-2016, 11:34 AM
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Sweet & only a 12 pack for labor $$$
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