Z1 braking improvement

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27 Apr 2016 11:46 #723279 by Yorkie
Z1 braking improvement was created by Yorkie
I am starting to use my Z1 to commute to work and I cannot say that I am impressed with the front brake. I was wondering if there was a modern front caliper I could use (and MC if necessary) that would improve matters. For my H1 I fitted an EX500 front caliper with a custom mounting bracket and that did a wonderful job of stopping the beast. Is there a common swap or am I looking at adding another disk and caliper? I would rather not go down that road as it only adds weight but she is a fat pig anyway.
Thanks,
Kevin

'72 Z1

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  • SWest
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  • 10 22 2014
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27 Apr 2016 11:55 - 27 Apr 2016 11:57 #723283 by SWest
Replied by SWest on topic Z1 braking improvement
I have duel disks and H2 calipers. I can lock up the front wheel if I want to. Tire selection makes a difference too.
Steve



Attachments:
Last edit: 27 Apr 2016 11:57 by SWest. Reason: Add pics

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27 Apr 2016 12:53 #723294 by pete greek1
Replied by pete greek1 on topic Z1 braking improvement
I think I read on a post on here from 5 yrs ago, that 85-86 GPZ 900 calipers will bolt right up on Z1 900 fork legs, I don't know if you would a need spacer for the rotor though
Pete

1980 LTD 1000..,1976 LTD 900, have the 1000&900 now. the rest are previous= 1978 KZ 650 B.., 1980 Yamaha XT 500..,1978 Yamaha DT 400.., 1977 Yamaha yz 80..,Honda trail ct 70.., Honda QA 50...5-1/2 hp brigs & straton CAT chopper mini bike...3-1/2 hp mini bike (WHEN GAS WAS ABOUT 45 CENTS A GALLON)!!!!

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28 Apr 2016 06:36 #723412 by floivanus
Replied by floivanus on topic Z1 braking improvement
The EX brake swap will work on the Z1 fork legs. The members here really don't do that swap, my 80 ltd has twin ex calipers on it, much improved over the stock setup.

Ja-moo's setup works on the z1 forks (should be same spacing as H2 calipers) the kz fork legs require welding extra material to the caliper bracket

my bikes; 80kz1000(project), 77 gl1000, 74 h2 (project)
Past; 78 kz1000, 83 kz550
Andrew

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28 Apr 2016 07:20 - 28 Apr 2016 07:21 #723419 by Kidkawie
Replied by Kidkawie on topic Z1 braking improvement

floivanus wrote: The EX brake swap will work on the Z1 fork legs. The members here really don't do that swap, my 80 ltd has twin ex calipers on it, much improved over the stock setup.

Ja-moo's setup works on the z1 forks (should be same spacing as H2 calipers) the kz fork legs require welding extra material to the caliper bracket


Any links to that stuff? I'm looking for some sort of bolt-on mod myself keeping the original wheel and forks.

And yeah, the massive rotor probably creates more momentum than braking. lol

1975 Z1 900
1994 KX250 Supermoto
2004 KX125
Last edit: 28 Apr 2016 07:21 by Kidkawie.

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28 Apr 2016 08:36 #723436 by floivanus
Replied by floivanus on topic Z1 braking improvement
www.kawtriple.com/mraxl/caliper/conversions.htm

They also cut the rotor down to used area only for the ex500 brake conversion, losing a lot of extra rotor mass

www.kawtriple.com/mraxl/tips/rotormod.jpg

Single disc and a 13mn master is considered perfectly good, most think the 2nd brake is overkill, I put dual ex (zx6 1986? I believe on my bike) brake calipers on my 1000

my bikes; 80kz1000(project), 77 gl1000, 74 h2 (project)
Past; 78 kz1000, 83 kz550
Andrew
The following user(s) said Thank You: Yorkie

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28 Apr 2016 08:47 #723439 by Yorkie
Replied by Yorkie on topic Z1 braking improvement
Perfect!! I really don't want to add any more mass to the front wheel so an EX conversion is the solution. Stupidly I sold a twin disk EX conversion with cut down disks to the Kawi2Stroke.com guys a couple of years.....

'72 Z1

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28 Apr 2016 09:05 #723443 by Kidkawie
Replied by Kidkawie on topic Z1 braking improvement

Yorkie wrote: Perfect!! I really don't want to add any more mass to the front wheel so an EX conversion is the solution. Stupidly I sold a twin disk EX conversion with cut down disks to the Kawi2Stroke.com guys a couple of years.....


Make a thread w/pics if you do it. Gonna be a bit before I have any free time for my conversion.

1975 Z1 900
1994 KX250 Supermoto
2004 KX125

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28 Apr 2016 09:16 #723444 by Yorkie
Replied by Yorkie on topic Z1 braking improvement
Just picked up a complete EX500 brake assembly off ebay for $25 shipped. Jim at Lake Services has the bracket for $15 so I shot him an email to order one of those as well. Could be in business for less than $50

'72 Z1

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28 Apr 2016 09:56 #723450 by MDZ1rider
Replied by MDZ1rider on topic Z1 braking improvement
Sounds like you're committed to the conversion already. Did you try optimizing the stock system? Metallic pads and Braided SS lines will make a noticeable improvement to the OEM system.

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28 Apr 2016 12:41 #723484 by floivanus
Replied by floivanus on topic Z1 braking improvement
When it comes to an aging stock system you end up looking at $50+ for a new piston $50 for a seal kit, a master cylinder rebuild kit (never bought or priced one, so no clue.) pads, and brake lines for optimizing things.

The ex250/500/600 caliper is STILL in use today on the smaller kawis, making them a breeze to get (for a left and a right caliper I paid $35 bucks) bought a matching master for $40, and two new brake lines for $40, all in all I have a more modern, upgraded brake system for under $150, although like I stated, on the kz models you have to relocate the mounting holes, no big deal, a couple hours with a MIG to sort it out.

my bikes; 80kz1000(project), 77 gl1000, 74 h2 (project)
Past; 78 kz1000, 83 kz550
Andrew

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