YZ 80 Clutch Question

wpark89
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wpark89 10/23/2017 11:33am
10/23/2017 11:33am Edited Date/Time 11/14/2017 1:58pm
I was hoping to get some input from you guys. I'm restoring a 87 YZ 80 and the clutch basket was in terrible shape. The only option I found was that ProX lists an 86-92 basket in their catalog but it isn't sold in the US. I found one cheap on eBay in France but some dimensions are different. I'm wondering if I can make it work, or is it totally wrong and I got a mispackaged part.

1-the center hole is 28mm on the pro x and 34mm on the stock basket (easy to fix)
2-the pro x is 4mm taller (there is a thicker section on the back side that could be machined down)
3-the "fingers" for the fiber plates are 32mm deep on the pro x and only 26mm on the stock
If I just get the hole fixed will this work? The YZ plates do fit in the pro x.















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SmokinJoe439 10/23/2017 2:27pm
10/23/2017 2:27pm
You sure you got the right basket? Was there a part number on the box? I don't see one on the basket. I think you got a later model one for 93 plus.

Did you check mitaka out? Aka pro x also for a basket. Say you go through all the trouble of trying to make it fit and it doesn't engage the clutch correctly then what? Your back to where you was.
wpark89
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wpark89 10/23/2017 3:24pm
10/23/2017 3:24pm Edited Date/Time 10/23/2017 3:35pm
Exactly. And returning it to France isn't an option. I'm trying to find someone with a 93 or newer clutch basket to compare measurements.

The only options were the Mitaka on eBay in Europe or MD Racing from the U.K. which is also made by Pro X.

I don't know if it's how they all are or i got one that was labeled wrong. I'm going to do some searching tonight.
SmokinJoe439 10/23/2017 8:12pm
10/23/2017 8:12pm
I checked the mitaka UK site no basket is listed for the 92 n older from them.
wpark89
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wpark89 11/8/2017 1:28pm
11/8/2017 1:28pm
What a deal this has turned into....I figured I'd just eliminate any chance of getting it wrong. I ordered the oem yamaha clutch basket (comes together with the primary gear).

Only the Yamaha part matches the Pro X basket....not the oem part that's in my bike. I checked the number 20 times...supposed to be for 86-92 YZ 80. But it isn't...

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wpark89
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wpark89 11/14/2017 6:06am
11/14/2017 6:06am
Solved the mystery. Some previous owner put a 1980-85 clutch basket in my 87. After looking at lots of parts on eBay and realizing the 86-92 uses 1 more Clutch plate I figured it out. The ProX and Yamaha parts are right.
SmokinJoe439 11/14/2017 12:30pm
11/14/2017 12:30pm
Damn it I replied back last week suggested that but it didn't post glad you figured it out. I always thought the bottom ends from 82 on was the same.

My older brother had an 84 for like 2 months coming off a 79. Sold the 84 so fast for this 82 yz100j. I was all about Cr's then.
wpark89
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wpark89 11/14/2017 1:58pm
11/14/2017 1:58pm
Yeah just about everything is the same. They changed very little, but now I know in '86 they went to a little deeper clutch basket to use 6 plates instead of 5 and they changed from angeled gears to straight on the primary gear kogs.

All the parts are interchangeable. I found out guy's use the newer basket in the pre 85 to add a clutch plate. I just don't know why the heck someone put the older basket in the 87.

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