Highest rated Tires for KZ1000

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Highest rated Tires for KZ100

10 Sep 2025 13:06 - 10 Sep 2025 15:24
#916991
Hey all,

I am looking for some higher rated tires and I am hoping some one here can point me in the right direction. 

120/90/18 and 100/90/19 on standard KZ1000 18/19 rims. - I am hunting for W rated or Higher, I have V but need to be rated above 160mph.

Any one have any suggestions?
1977 kz1000 - the Rooster, 1981 KZ750 Chopper, 1975 KZ400 , 1984 GPZ750
Last edit: 10 Sep 2025 15:24 by Mr. E. Reason: Can the title be corrected to kz1000?

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Re: Highest rated Tires for KZ100

10 Sep 2025 14:30 - 10 Sep 2025 14:32
#916994
You have a KZ that will exceed 160mph"

I have not shopped for Z rated in stock sizes, but I doubt there are any. 
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: 10 Sep 2025 14:32 by TexasKZ.
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Re: Highest rated Tires for KZ100

10 Sep 2025 14:57
#916996
We joined the USFRA 130mph club this last week with a top run of 139.765 (almost broke out ) on the 1 mile track. We are going for the 150mph club on the 2.25 mile track next year.

We have more in the engine and room to gear down in the rear.

I can't say we will see 160mph  plus, but I do know tech won't pass us until I have tires rated W or better.
 
1977 kz1000 - the Rooster, 1981 KZ750 Chopper, 1975 KZ400 , 1984 GPZ750

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Re: Highest rated Tires for KZ100

10 Sep 2025 15:31
#916998
W speed rating is 168 mph.  

Certainly, in your travels to Bonneville and such, you have met people in that community.  What tires do those folks run?  I've never heard of an over the counter tire, in KZ sizes, able to endure those sorts of speeds.
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Re: Highest rated Tires for KZ100

10 Sep 2025 15:49 - 10 Sep 2025 15:49
#917001
We are pretty new to the sport and this is our second time. I didnt socialize as much as I could have perhaps.
The forums here were my first thought when looking for KZ specific advice 

 
1977 kz1000 - the Rooster, 1981 KZ750 Chopper, 1975 KZ400 , 1984 GPZ750
Last edit: 10 Sep 2025 15:49 by Mr. E.
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Re: Highest rated Tires for KZ100

10 Sep 2025 15:57
#917003
Good luck in your search!  Running top speed on the lake bed sure sounds like FUN!

Years ago, my buddies and I used to go dirt bike riding out in the California desert at El Mirage dry lake.  Several times when out there, the top speed guys were doing their thing!  So COOL!  The noise was amazing.  I remember all kinds of crazy bikes out there.  Some with gearing so tall, they needed a truck push up to significant speed to get moving.  Ha ha.  
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Re: Highest rated Tires for KZ100

10 Sep 2025 17:17
#917004
Do you have to run stock wheel sizes (dropping to 18's would open up options like early GSXR and GPZ1100-uni tyre sizes ?)
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Re: Highest rated Tires for KZ100

10 Sep 2025 18:04
#917006
I found two tires that are ZR rated in those diameters but they are both fronts :

Metzeler Cruisetec 120/70ZR19
Pirelli Angel GT 120/70ZR18
 
1978 KZ650B2 w 1197cc Z1 engine
1977 KZ650B1 w 750cc Spectre engine
1979 KZ650C3 w 831cc Hot Rod engine
1978 KZ650C2 w 762cc DFI project
1977 KZ650C1 stock restoration project
1978 KZ650B2 modified project
1978 KZ650B2 Injected Drag 831cc
1980 Z1 Custom Frame Drag 1327cc
1981 Z50R Honda tow bike
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Re: Highest rated Tires for KZ100

11 Sep 2025 05:01
#917015
Very cool and good luck.

i wonder if the radial tires Injected mentioned would be happy on those narrow wheels?
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
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Re: Highest rated Tires for KZ100

11 Sep 2025 06:30
#917022
Sorry to clutter up this thread with silly memories, but...

I remember a bike at El Mirage, waiting its turn to run.  The bike was seriously laid out, with the foot pegs back by the rear axle!  It was a Kawasaki 500 or 750 two-stroke triple, with some long ass expansion chambers.  As the rider moved up in queue, when time came to start and warm up the engine, he reached down, while laying over the bike, using his hand on the kick-start lever, and lit that thing off!  It purred like a caged tiger.  Far more civilized sounding than one might expect.  Like most similar modified stock bikes, it had a crazy tall first gear.  Sadly, I don't remember how fast this bike ran but the memory is otherwise etched into the deep recesses of my brain!
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Re: Highest rated Tires for KZ100

Yesterday 20:19
#917043
All the good race orientated tires are mostly 17" very few in 18" and way less in 19".

Shinko has quite a few options, even slicks but mostly in 17" size.
1978 KZ650B2 w 1197cc Z1 engine
1977 KZ650B1 w 750cc Spectre engine
1979 KZ650C3 w 831cc Hot Rod engine
1978 KZ650C2 w 762cc DFI project
1977 KZ650C1 stock restoration project
1978 KZ650B2 modified project
1978 KZ650B2 Injected Drag 831cc
1980 Z1 Custom Frame Drag 1327cc
1981 Z50R Honda tow bike

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Re: Highest rated Tires for KZ100

Yesterday 16:01
#917074
It seems I will be on the hunt for some drag wheels in 17 for up front and something cool for the rear. I would like to find a solid rear wheel - 
1977 kz1000 - the Rooster, 1981 KZ750 Chopper, 1975 KZ400 , 1984 GPZ750

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