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ShelbyGT660

1992 Yamaha Timberwolf - Oil Out Breather?

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Since I have had this Yamaha Timberwolf it has had the problem of blowing oil out the breather, Also if I am running it down a road and look back I can smell oil, So I assume its burning it as well, Plug is a light brown in color. Goes through about a quart in about 7 hours of run time, Some of which ends up in the breather box, How can I remedy this? It has good compression (Rated is 128PSI) 125PSI. And starts without problem with the electric start. I am out of ideas and the cost of oil is killing me.

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Only one vent line, And yes its clear as it has pressure out it when engine is running. Its strange that this engine has no filter or valve between the vent and airbox

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just read your other post and went looking online ...

it's probably this : worn compression rings, & oil control rings, worn bore, worn ring grooves - do a leakdown test and that will tell you for almost certain ...

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Well, For the time being I guess I am going to have to run it as is, As its my main transportation and I got no money to purchase a leakdown tester

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Also, Heres the plug

IMG_20121115_164301.jpg

Weird line around it?

IMG_20121115_164336.jpg

Oil leak from where? The cam cover is tight, And oring is good (Checked it when I redid the valves)

IMG_20121115_165657.jpg

IMG_20121115_165702.jpg

IMG_20121115_165715.jpg

Sorry for the bad pics, Samsung Galaxy was taking good pics until i scratched the lens -_-

And the exhaust has leaks (Around where the header meets the muffler

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Ok, New problem, It seems to be running wayyy to hot, Its melting the o-rings on the valve covers and starting to melt the plastic on the oil dipstick >_> Its also now burning oil big time when its hot, I am guessing its due to the oil thinning? Or it blew the oilring out from overheating

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