KZ400 D3 Caliper replacement

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KZ400 D3 Caliper replacement

14 May 2025 10:19
#912427
Hello everyone, I have a '76 KZ400 and I can't find brake piston seals anywhere. At this point, the only solution I see is to replace the entire caliper. Does anyone know of a compatible model, or have any suggestions on how to solve this?

Thank you!

 

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Re: KZ400 D3 Caliper replacement

14 May 2025 12:49
#912441
Welcome to KZRider
Your next post here must be a introduction  telling about you and your bike 
Dave

Original owner 78 1000 LTD
Mr Turbo Race Kit, MTC 1075 Turbo pistons by PitStop Performance , Falicon Ultra Lite Super Crank, APE everything. Les Holt @ PDM's Billet Goodies . Frame by Chuck Kurzawa @ Logghe Chassis . Deep sump 5qt oil pan. RIP Bill Hahn

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Re: KZ400 D3 Caliper replacement

14 May 2025 13:07
#912443
Hi Dave! Yes, you're right! My name is Mariano. I bought my KZ in Barcelona a few years ago, but we moved to California and I shipped it from BCN all the way to Los Angeles. I wasn’t able to use it due to registration issues, but now she’s ready to ride — except for this brake issue.If anyone in the forum can help me, it would be greatly appreciated.Thank you!   
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Re: KZ400 D3 Caliper replacement

15 May 2025 05:51 - 15 May 2025 05:53
#912455
.
1982 KZ1000 LTD parts donor
1981 KZ1000 LTD awaiting resurrection
2000 ZRX1100 not ridden enough

www.kzrider.com/11-projects/620336-anoth...uild-thread?start=24
Last edit: 15 May 2025 05:53 by TexasKZ.
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Re: KZ400 D3 Caliper replacement

15 May 2025 08:43 - 15 May 2025 08:44
#912457
Welcome. The caliper seal for the '76 KZ400D3 is a known issue. Some say there is a Harley seal that will work, others have tried the seal sold by a guy o9n eBay. I didn't have much luck with the eBay seal and plan on adapting a Ninja EX500 caliper to my 400. 
Here is the eBay seal. The picture is misleading as this is NOT an NOS seal.  eBay KZ400 caliper seal
Jim
North GA
2016 Yamaha FJR1300ES
1982 GPz750 R1
1974 Kawasaki H1
1976 Kawasaki KZ400
1979 Yamaha XS650 cafe'
2001 KZ1000P
2001 Yamaha YZ426
1981 Honda XR200 stroked in an '89 CR125 chassis
1965 Mustang
1967 Triumph GT6
1976 Bronco
"If you didn't build it, it's not really yours"
Last edit: 15 May 2025 08:44 by ThatGPzGuy.
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Re: KZ400 D3 Caliper replacement

15 May 2025 12:13
#912460
Thank you! At this point I don't see other option that replace the caliper, I bought a couple of ring and they don't work. Can you please send a link to the one you want to use?

Thank you!
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Re: KZ400 D3 Caliper replacement

16 May 2025 05:17
#912471
mariano205 wrote:
Thank you! At this point I don't see other option that replace the caliper, I bought a couple of ring and they don't work. Can you please send a link to the one you want to use?

Thank you!
The EX500 caliper? I bought a caliper and MC for a EX500 on eBay but have not built an adapter for it as of yet.
Jim
North GA
2016 Yamaha FJR1300ES
1982 GPz750 R1
1974 Kawasaki H1
1976 Kawasaki KZ400
1979 Yamaha XS650 cafe'
2001 KZ1000P
2001 Yamaha YZ426
1981 Honda XR200 stroked in an '89 CR125 chassis
1965 Mustang
1967 Triumph GT6
1976 Bronco
"If you didn't build it, it's not really yours"
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Re: KZ400 D3 Caliper replacement

17 May 2025 14:45
#912515
Can’t believe it’s been 10 years since I wrote this tutorial

kzrider.com/forum/5-chassis/597812-kz400...r-fork-swap-tutorial
'78 1000 Long Term Project
 '80 750G
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