oil leak on 400ex - Honda ATV Forum
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post #1 of 7 (permalink) Old 02-19-2011, 06:39 PM Thread Starter
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oil leak on 400ex

on my 08 400ex i got a shirt caught up in the front sprocket and it started leaking from the seal behind the sprocket. Do i need to pull engine apart to fix or can it be done externally??? So frustrated with this where do i start? the service manual doesnt help.

2008 400ex stock
2008 450er gutted exhaust, jetting, -1 front tooth, modquad afs, k&n air filter, mesh screen airbox cover.....
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post #2 of 7 (permalink) Old 02-19-2011, 06:48 PM
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Welcome to the forums! I don't know the answer to your question but I have a counter question.. How in the world did your shirt get caught up in there? HAHAHA?

Someone that DOES know the answer will be round shortly to help you out.

1988 FourTrax 300
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post #3 of 7 (permalink) Old 02-19-2011, 07:05 PM
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Make sure your oil isn't too high I had a problem with leaking when it was too high
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post #4 of 7 (permalink) Old 02-19-2011, 07:12 PM
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Do a search next time!

How to chance the Oil seal behind front sprocket on 2003 400EX

I think when he says 'pic' he means a seal 'pick' or hook and pick set (img below) or you can use a drywall screw and then pull the old seal. Get the new seal lined up and tap it in with a socket of approximately same size.

Click the image to open in full size.

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post #5 of 7 (permalink) Old 02-19-2011, 08:39 PM
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Dang, He's new, its cool. I' still more interested in HOW he got his shirt stuck in there. HAHA!

1988 FourTrax 300
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post #6 of 7 (permalink) Old 02-19-2011, 08:48 PM
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Welcome to the forums. Yes, like stated above, the seal can be changed without taking the engine apart. Just take the sprocket off. Drill a couple holes in the seal on each side and use sheetrock screws or a similar screw. Just drill a small hole, just big enough to get the screws started and turn them in a few turns, enough to hold good. Grip them with ViseGrips and pull the seal out. If needed, you can drill more than two holes. The pick set, like pictured above, can also be used to help get the seal out.

Put a little grease on the lip of the new seal and slide it over the shaft and make sure to start it straight. You will have to use a deep well socket or something long enough to go over the shaft to tap the seal in with. Set the socket on the seal and gently tap with a hammer and make sure you keep it straight or it can bend or leak. The outside of the socket should be about the same size as the outside of the seal. If you don't have a socket that will work, a thick piece of pipe will work, but make sure the end of the pipe isn't sharp or it might cut the seal.

Most 4-wheeler problems are caused by a loose nut connecting the handlebars and the seat!!

You only need two tools in life -- WD-40 and duct tape. If it doesn't move and should, use the WD-40. If it shouldn't move and does, use the duct tape.
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post #7 of 7 (permalink) Old 02-23-2011, 05:10 PM Thread Starter
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Quote:
Originally Posted by Fourtrax View Post
Welcome to the forums! I don't know the answer to your question but I have a counter question.. How in the world did your shirt get caught up in there? HAHAHA?

Someone that DOES know the answer will be round shortly to help you out.
haha well long story short it was really a balaclava. I am coast guardsmen stationed in Valdez, ak and i went riding early winter and while putting it back in storage i had the balaclava on my lap and it slid down into chain with out me feeling it thru my thick snow pants lol and i didnt realize it till i rode it in and went back and forth a couple times. so it broke the plastic chain protector and fabric went all in the seal and still has shreds in it. rode it a couple times hopin it didnt really do much damage but leaks oil wen warmed up. I am in process of ordering the seals.

2008 400ex stock
2008 450er gutted exhaust, jetting, -1 front tooth, modquad afs, k&n air filter, mesh screen airbox cover.....
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