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Please help, 73' Z1 fork rebuild gone bad !
- superboosted
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- not new to motors/but surely new to this one!
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30 May 2008 14:20 #216819
by superboosted
77\\\\\\\'KZ750B
80\\\\\\\'CB750K
76\\\\\\\'BMW R75/6
Please help, 73' Z1 fork rebuild gone bad ! was created by superboosted
Well...I am sort of restoring a Z1 for a very good freinds father,as it is his last wish to ride his old bike that had been sitting for atleast 10 years.
Heres the problem---I took the fork apart to clean it,new seals and dust boots.Filled it with ten weight.Now it just feels sticky and you can almost lock it down.Also drained it and tried atf,same deal.
Instead of going uuuuppp-dooowwwnn it goes u-u-u-u-p- d-o-o-w-n.. :blink:
Thanks in advance,I have about 60hrs in this bike and would just like to be done,so I could actually ride my own. :silly:
Heres the problem---I took the fork apart to clean it,new seals and dust boots.Filled it with ten weight.Now it just feels sticky and you can almost lock it down.Also drained it and tried atf,same deal.
Instead of going uuuuppp-dooowwwnn it goes u-u-u-u-p- d-o-o-w-n.. :blink:
Thanks in advance,I have about 60hrs in this bike and would just like to be done,so I could actually ride my own. :silly:
77\\\\\\\'KZ750B
80\\\\\\\'CB750K
76\\\\\\\'BMW R75/6
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- OKC_Kent
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30 May 2008 14:54 #216826
by OKC_Kent
Oklahoma City, OK
78 KZ650 B2 82,000+ miles
Replied by OKC_Kent on topic Please help, 73' Z1 fork rebuild gone bad !
Any possibility the tubes are bent?
Oklahoma City, OK
78 KZ650 B2 82,000+ miles
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- FastKaw1
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30 May 2008 15:09 #216829
by FastKaw1
Replied by FastKaw1 on topic Please help, 73' Z1 fork rebuild gone bad !
As long as you put them back together right, there not much to them
so I duet that.
My first guess would be the springs. If they are OEM and bin
under a compression for all those years there probably (bound)
Was the top cap hard to put on or did the spring stick up past
the top of the tube?
XENU
so I duet that.
My first guess would be the springs. If they are OEM and bin
under a compression for all those years there probably (bound)
Was the top cap hard to put on or did the spring stick up past
the top of the tube?
XENU
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- superboosted
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30 May 2008 18:22 #216856
by superboosted
77\\\\\\\'KZ750B
80\\\\\\\'CB750K
76\\\\\\\'BMW R75/6
Replied by superboosted on topic Please help, 73' Z1 fork rebuild gone bad !
Actually the spring is level with the top of the fork tube with the fork fully extended.
I have done them before...I can't imagine they are bent.They weren't before.
I have done them before...I can't imagine they are bent.They weren't before.
77\\\\\\\'KZ750B
80\\\\\\\'CB750K
76\\\\\\\'BMW R75/6
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- Patton
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30 May 2008 19:33 - 30 May 2008 19:40 #216878
by Patton
1973 Z1
KZ900 LTD
Replied by Patton on topic Please help, 73' Z1 fork rebuild gone bad !
Sometimes it helps to loosen the axle clamps and then work the forks up and down allowing the lowers to re-set onto the axle. And assure the clamps are properly oriented (arrow pointing forward) before re-tightening, with gap in the rear and no gap in front.
Could also test fork action with front fender bolts loosened, to see whether fender fitment is somehow binding the lowers from being in the correct positions.
Also sometimes helps to loosen all the fork clamps and then retighten them.
Good Luck!
Could also test fork action with front fender bolts loosened, to see whether fender fitment is somehow binding the lowers from being in the correct positions.
Also sometimes helps to loosen all the fork clamps and then retighten them.
Good Luck!
1973 Z1
KZ900 LTD
Last edit: 30 May 2008 19:40 by Patton.
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- FastKaw1
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31 May 2008 05:35 #216924
by FastKaw1
Replied by FastKaw1 on topic Please help, 73' Z1 fork rebuild gone bad !
Try 20 weight. Pump them at least 20 times.
I don't recommend this, but you could shim the spring at the top.
A pice or 3/4 conduit 3/4 to 1 in. long between the spring and cap.
Found them that way lots of times. Cheep way to stiffen them up I guess.
XENU
I don't recommend this, but you could shim the spring at the top.
A pice or 3/4 conduit 3/4 to 1 in. long between the spring and cap.
Found them that way lots of times. Cheep way to stiffen them up I guess.
XENU
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- superboosted
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31 May 2008 10:54 #216952
by superboosted
77\\\\\\\'KZ750B
80\\\\\\\'CB750K
76\\\\\\\'BMW R75/6
Replied by superboosted on topic Please help, 73' Z1 fork rebuild gone bad !
Thanks guys...I will try all of these ideas.
Unfortunately I got it running last night and there is something rattling in the gearbox.
Unfortunately I got it running last night and there is something rattling in the gearbox.
77\\\\\\\'KZ750B
80\\\\\\\'CB750K
76\\\\\\\'BMW R75/6
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- FastKaw1
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31 May 2008 12:32 #216964
by FastKaw1
Replied by FastKaw1 on topic Please help, 73' Z1 fork rebuild gone bad !
If it's setting a long time you may have broken a couple of clutch plats on
first start up. easy fix Id check that first.
first start up. easy fix Id check that first.
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