[ATV MECHANICS? Please explain hole in rear final drive 250ex.] - ATV Riders Forums - Honda, Yamaha, Suzuki, Kawasaki, Polaris, CanAm, Arctic Cat, Kymco ATVs

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ATV MECHANICS? Please explain hole in rear final drive 250ex.
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Posted by: GetnBizzy

Any ATV mechanics care to give this one a shot? Anyone else know?

Installing a new axle and drum brakes on a 2002 250ex, and decided to replace the 3 axle bearings and 2 seals. I noticed a threaded on this board about an open hole in the bottom of the final gear assembly, but it's inconclusive. That thread is here:hole in rear differential...

In this picture you can see the new axle in place with the thin black plastic spacer around it: [URL=<a href="http://s136.photobucket.com/albums/q165/getnbizzy/?action=view¤t=DSC00546.jpg" target="_blank"><img src="http://i136.photobucket.com/albums/q165/getnbizzy/DSC00546.jpg" border="0" alt="250ex axle spacer"></a>]axle and spacer[/URL]

In this picture you can see a little yellow piece of paper sticking up through the hole in the case: [URL=<a href="http://s136.photobucket.com/albums/q165/getnbizzy/?action=view¤t=DSC00553.jpg" target="_blank"><img src="http://i136.photobucket.com/albums/q165/getnbizzy/DSC00553.jpg" border="0" alt="250ex axle spacer 2"></a>]hole in case[/URL]

Is the black spacer supposed to be a tight seal around the axle? What is the hole in the case for? If it's to let water in why and where is it supposed to go? Does the service manual explain this?

Thanks in advance for any help. MH.