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Makotosun

1981 MX80 fork disassembly

  • Drew-NY
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1981 MX80 fork disassembly was created by Drew-NY

Makotosun is working on the website and the search function is limited right now.

I'm trying to get the forks disassembled but no joy.  I have the snap ring and washer removed but neither one will come apart, even with heat. I tried compressing the spring and allowing it to snap back with a slide-hammer action and then tried pulling on the upper tube.

*** these are the later KYB forks that do NOT have the threaded collar under the dust boot.***

Is there a bolt inside the fork that has to be removed first?
1976 DT175C
1981 MX80
2008 XT250
2005 FZ1
1973 RD350
1981 GS750E
1978 KZ400B1
1920 Harley-Davidson J
05 Jul 2023 16:34 #1

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  • Drew-NY
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Replied by Drew-NY on topic 1981 MX80 fork disassembly

I got it. The only thing holding the slider in the outer tube is the snap ring above the seal and washer, no other fastener needs to be removed. The right fork came apart with lots of heat from a hot air heat gun and *a lot* of slide hammer action from compressing the spring and letting it release.

The left side was very badly stuck. I had to step up to heating the seal area with a propane torch and that didn't work either. I heated it again until the seal started to char and even then it took hundreds of compress/snap back cycles until it finally inched its way out a little at a time. Unfortunately, the inner slider has a bad rust spot in the seal travel area at the fully extended position and is not usable.

I was hoping to ride this MX80 around Vintage Motorcycle Days but I have a ton of work to do on it and VMD is only two weeks away.
1976 DT175C
1981 MX80
2008 XT250
2005 FZ1
1973 RD350
1981 GS750E
1978 KZ400B1
1920 Harley-Davidson J
The following user(s) Liked this Post: MarkT, RT325
05 Jul 2023 19:01 #2

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