1999 Bayou 300 (klf300-b12) hole in engine case?

[kdxfan]

I have scored a 1999 bayou 300 for free. It has been setting for years (2) but it was too good to pass up. I have found the usual problems, dirty tank ,clogged pitcock, gummed up carb. etc. I also noticed a oil leak. I lifted the front of the quad up high so I could get a good look at what is going on. I wiped down the case and found something im not sure about. I found a hole in the case at the front and down low. It does not look like it was hit or damaged from riding. The hole is about the width of a penny and about half an inch long, it is located where the case halfs are put together. I thought it could be a vent of some kind but to me it seems to be to low. It would get full of mud and water. I haven't put any money into the quad yet so now is the time to answer this question. Thanks for any help.

[oxidized_black]

i wonder if some type of rubber gasket was there before? here's a link for the service manual for the bike. big file, 174Mb's...

https://www.yousendit.com/download/TEhYYUlxa0RveE94djhUQw

[kdxfan]

Thanks ,I looked through the tech manual and found the "hole" is used for case splitting. I found it in section 7-5 on page 91. So the question now is where to get a new plug for it. Thanks for the tech manual my friend!

Edited September 29, 2012 by kdxfan

[Mudflap64]

Is it leaking oil? Does a parts blowup view show that there should be a blug in it? Ronnies ATV parts website has some great micro-fische views. Ronnie's Mail Order for atv parts, atv tires, snowmobile, watercraft and motorcycle featuring an OEM microfiche parts finder.

[marioweldinginc]

Clean it real good and blow it out with compressed air then put a lil rtv to keep the mud out

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