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Vintage Kats Only for Kats made PRIOR to 1988. Pics, Sightings, General Information, Questions;
if it has to do with vintage katana's you'll find it here.

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Old 11-02-2017, 11:19 AM   #1
sixdog
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Default 1000 Kat Fork question

Guys, as we know the front suspension is quite stiff on the 1000 Kat. What oil weight are you guys using and has anyone replaced the springs with units from GS1100? I have called Progressive and they said they don't make springs for the 1000 Kat.
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Old 11-03-2017, 10:35 AM   #2
Mel Wainwright
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I use PJ1 Gold 15 weight fork oil. Each leg takes 227ml. The lighter the oil the softer the ride and conversely the heavier the stiffer the ride. I find the 15 weight works quite well
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Old 11-03-2017, 10:59 AM   #3
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Thanks Mel, yea I'm running 10w currently. Still too stiff for my taste. I going to switch to 7w next weekend. Maybe the previous owner replaced the springs with rel stiff ones. I may get a pair of GS1100 springs and see what happens.
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Old 11-03-2017, 04:22 PM   #4
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Let me know how you get on. The only drawback in draining the oil is the mess. Do your fork legs also have a drain plug on the side of the leg near the bottom on the outside?
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Old 11-03-2017, 07:18 PM   #5
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Yes....at the bottom on the outside.....I will keep you posted and thanks!!!
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Old 11-03-2017, 10:05 PM   #6
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If you're leaving the forks installed and just draining from that hole, I'd recommend pumping up and down several times to try and get more dirty/old oil out. Then refill and drain again, with more pumping. Just draining isn't going to remove everything, going to need to flush it at least once.
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Old 11-06-2017, 10:00 AM   #7
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I installed Progressive springs on my Kat with 15 weight fork oil. Much better than stock. The original springs were designed to be STIFF! I purchased mine from Bike Bandit:

https://www.bikebandit.com/aftermark.../19732?m=21369
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Old 11-06-2017, 10:11 AM   #8
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Joe...THANKS BRO! I called Progressive and the gentleman told me they do not make springs for the 82 1000 Katana or the GS1000sz or GS1000s...go figure. I will order them today...thanks again!
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Old 11-06-2017, 10:14 AM   #9
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Quote:
Originally Posted by sixdog View Post
Joe...THANKS BRO! I called Progressive and the gentleman told me they do not make springs for the 82 1000 Katana or the GS1000sz or GS1000s...go figure. I will order them today...thanks again!
I ordered those last November from Bike Bandit. The box they came in had the right markings and they fit like a glove. If I remember correctly, Progressive had them on the website back then... interesting. I have two Katana friends that have Progressive springs in their Kats, also. Between the fork springs and the Progressive rear shocks, the Kat is much more ride-able (to me, anyway).
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Old 11-16-2017, 08:27 PM   #10
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Racetech has springs, single rate made to your specs.
They also have the gold Emulators.
I installed both on my 82, bike is transformed.
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