KZ750N1 front fork dissembly

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27 Jun 2022 19:01 #869445 by dnpurdy
KZ750N1 front fork dissembly was created by dnpurdy
Hey, I'm trying to dissemble my front forks to replace the oil seals.  I've taken the fender off, removed the calipers, and pulled the front wheel.

After draining the oil, I was able to get the socket head bolt out of the bottom of the first fork, from the bottom. Once that bolt was removed, the outer tube was able to drop down the whole length of the inner tube.

I would have expected from the drawings and instructions in the manual that the outer tube would then completely come off and out of the inner tube, allowing access to the seals for replacement. However, when it reaches the end of the length of the inner tube, it seems to bottom out against something, almost like a lip or ridge. 

Obviously, I'm missing someone stupid about how to take these apart. Anyone help?

(1980 KZ440-A1 sold project bike)
(1982 KZ750-N1 still stolen)
1982 KZ750-N1, my only now

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  • Scirocco
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27 Jun 2022 23:48 #869453 by Scirocco
Replied by Scirocco on topic KZ750N1 front fork dissembly
You have to remove the retainer clip #7 to un-lock the fork seal.

 

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28 Jun 2022 04:36 #869459 by dnpurdy
Replied by dnpurdy on topic KZ750N1 front fork dissembly
So I was able to remove that circlip just fine, but the lower tube still gets stuck at the bottom of the inner tube.

I loosened the triple tee clamp bolts around the fork leg, and actually by sliding the outer tube up and down, it actually worked the fork out of the triple tee - kinda like a slide hammer.

So clearly something else is retaining the outer tube....

(1980 KZ440-A1 sold project bike)
(1982 KZ750-N1 still stolen)
1982 KZ750-N1, my only now

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28 Jun 2022 04:50 #869460 by dnpurdy
Replied by dnpurdy on topic KZ750N1 front fork dissembly
Happy to take a short video if anyone would think that would be helpful to see what I'm experiencing

(1980 KZ440-A1 sold project bike)
(1982 KZ750-N1 still stolen)
1982 KZ750-N1, my only now

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  • Scirocco
  • Away
  • Premium Member
  • Never change a running system
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28 Jun 2022 15:16 #869498 by Scirocco
Replied by Scirocco on topic KZ750N1 front fork dissembly
There is also an Allen head screw with an copper washer bolt to the piston/damper unit you had to remove next.

 

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02 Jul 2022 07:29 #869767 by blipco
Replied by blipco on topic KZ750N1 front fork dissembly
Here’s a good vid showing how to rebuild while leaving the spring in place (just bottom end) for a fluid/seal replacement.

"Swim against the current, even a dead fish can go with the flow"-somebody (I forget Who)

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