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Old 10-06-2009, 04:11 PM   #1 (permalink)
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'91 C front forks

I posed this question in another forum, but will add here:

I am rebuilding the front forks and need oil weight/capacity specs for '91 Zx 11 C; does anyone here have a manual they can get this info from? Thanks.
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Old 10-07-2009, 03:49 PM   #2 (permalink)
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OEM book
viscosity sae10w-20
amount 458ml +/-4ml DRY
amount 390ml changing oil
level 149+/-2mm fork collapsed
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Old 10-07-2009, 05:15 PM   #3 (permalink)
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Quote:
Originally Posted by rsr View Post
level 149+/-2mm fork collapsed
I would add: no spring inside.
I always prefered this method of measuring level with a ruler than by volume.
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Old 10-07-2009, 08:14 PM   #4 (permalink)
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Thanks, fellas. I get my sliders back from PC in a few days, and now will have all I need for ass'y.
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Old 10-08-2009, 12:48 AM   #5 (permalink)
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let us know how that turns out...gonna re valve the forks on my 95 zx11d...good luck...
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Old 10-08-2009, 05:50 AM   #6 (permalink)
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Quote:
Originally Posted by BlackFrost View Post
let us know how that turns out...gonna re valve the forks on my 95 zx11d...good luck...
Make sure you have the tool on hand to loosen the allen bolt from the piston. I didn't, and had to take mine to a dealer to loosen; one leg loosened fine, the other, he said, was difficult. Both allen bolts had factory threadlocker on them, and they had never been off until now.

Once apart, I made a tool to tighten them [calls for 29 ft lbs torque]. The top of the piston [Kaw calls this "fork cylinder" - #44022] has a 12 pt socket configuration, so some sort of hex-head tool was needed to hold piston while tightening allen bolt. My tool inexpensive and easy to make: I took my piston and my dial calipers to Lowes and found a pipe fitting reducer bushing with a hex that almost fit into the piston hex - the bushing is a 3/4 X 1/4 reducer, and its hex measured 1.160" across flats - I needed 1.152", and a little dressing with a file made the perfect fit; next, I re-tapped the 1/4 NPT hole in the reducer to a 1/2-13, and screwed a 1/2" socket head cap screw into it, lock-tited it, with a jam nut on each side. Now I can reach down onto the fork tubes with a two foot extension [w/ a 3/8" allen socket] and hold the piston while tightening. The reducer bushing was a little over a buck, and the 1/2"shcs [2"long] I had on hand. My 3/8" drive extension is 24" long.

Hope this helps anyone contemplating disassembly of their forks [at least the C model].

Dick
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Old 10-08-2009, 05:58 AM   #7 (permalink)
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Originally Posted by BlackFrost View Post
let us know how that turns out...gonna re valve the forks on my 95 zx11d...good luck...
Additional note: I just looked up the piston ["fork cylinder"] for a '95 ZX11, and it is the same p/n as my '91, so the above described tool should work.
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Old 10-08-2009, 06:38 AM   #8 (permalink)
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Some pics for the above:





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