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1990 Yamaha Big Bear 4X4 Clutch Help

mjm4jc

By mjm4jc
in Yamaha ATV Forum

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mjm4jc Apprentice

mjm4jc

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Hello everyone,

I am new to the forum and just recently inherited a 1990 Big Bear 4X4 semi-automatic. My son was riding it and the cover on the right side of engine blew out with a bunch of parts laying all over the ground. I did not ever find the cover. Anyway, I do have the Clymer book for this ATV, but it does not show a clear picture of how it all goes back together. What I recovered was one little spring and 4 weights/shoes, etc. From the looks of the parts that I found on the ground, it seems like it is a centrifugal clutch. Is that correct? I would love to ride it again, but need to know how to put it back together and what parts are missing.

Thanks

  • 3 months later...
mjm4jc Apprentice

mjm4jc

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Ok, I got the clutch carrier that I needed and started to put it in the other day. I had to take off the R/S engine cover in order to install the new carrier. When I took off the cover, several pieces fell to the ground. Keep in mind, the entire clutch carrier blew right out of the R/S engine cover. So I suspected that there may be some loose part in there. I do not see any of these pieces in any of the diagrams. There are some pics of the R/S engine in the manual, but it is really unclear----smudgy ink). If I make pics available of the parts that fell out, can someone help me figure out how they go back? Or, even if someone refers me to a "clear" diagram of the R/S engine and the inside of the cover, that would be great too. It seems that the parts have something to do with how the R/S engine cover mounts and that little fork that's inside perhaps.

Thanks

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