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re: kz750 ltd h2 1981- modern tires/pressures
- steelhorseangel
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- ad@wildlifeartist.plus.com
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02 Feb 2012 19:49 #501595
by steelhorseangel
Angel
Restore, Wrench & Ride!
Brought up with Dad, brother, all riders!
Our Dad (Eric) taught us both simple mechanics
before he went to the happy hunting ground, too soon (44)
My KZ is now called Eric and he will ride and protect me!
x God Bless x
kz750 ltd h2 1981- modern tires/pressures was created by steelhorseangel
hi kzr's
please can anyone advise me of the following:-
my kz was designed and built in 1981.
the old compounds for tires in 1981 was inferior
to modern day tire materials. in the owners
manual it states for a single rider the tire pressures
should be:-
front - 25psi
rear- 22psi
q). are these the recommended pressures
even today?
my friend has a current kawasaki z750 and the weight
is similar to my old gal, yet the tire pressures
are a lot higher.
this is a safety question and worries me that
no one seems to know the answer.
thank you so much for helping me!
regards
angel
please can anyone advise me of the following:-
my kz was designed and built in 1981.
the old compounds for tires in 1981 was inferior
to modern day tire materials. in the owners
manual it states for a single rider the tire pressures
should be:-
front - 25psi
rear- 22psi
q). are these the recommended pressures
even today?
my friend has a current kawasaki z750 and the weight
is similar to my old gal, yet the tire pressures
are a lot higher.
this is a safety question and worries me that
no one seems to know the answer.
thank you so much for helping me!
regards
angel
Angel
Restore, Wrench & Ride!
Brought up with Dad, brother, all riders!
Our Dad (Eric) taught us both simple mechanics
before he went to the happy hunting ground, too soon (44)
My KZ is now called Eric and he will ride and protect me!
x God Bless x
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- bountyhunter
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02 Feb 2012 20:34 #501604
by bountyhunter
1979 KZ-750 Twin
Replied by bountyhunter on topic kz750 ltd h2 1981- modern tires/pressures
I think I run about 30 - 32 front, and about 28 rear.
I can't believe 22 psi is right for a rear tire?
I can't believe 22 psi is right for a rear tire?
1979 KZ-750 Twin
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- 650ed
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02 Feb 2012 20:46 #501610
by 650ed
1977 KZ650-C1 Original Owner - Stock (with additional invisible FIAMM horn)
Replied by 650ed on topic kz750 ltd h2 1981- modern tires/pressures
I don't believe the recommended tire pressures were related to tire compounds being "inferior" in 1981. I say this because the recommended tire pressures in 1977 were much higher on my KZ650-C1 than on your newer bike (see tire pressure label below). Does your bike still have the pressure label under the seat? If the owners manual recommends those low pressures (and they really do seem low to me) maybe it's because of the tire sizes or wheel configuration. You might want to send a couple emails to some tire makers to get their opinion on what pressure you should use with their tires. Ed
Attachment tirepressurelabel.JPG not found
1977 KZ650-C1 Original Owner - Stock (with additional invisible FIAMM horn)
Attachments:
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- steelhorseangel
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02 Feb 2012 21:04 #501611
by steelhorseangel
Angel
Restore, Wrench & Ride!
Brought up with Dad, brother, all riders!
Our Dad (Eric) taught us both simple mechanics
before he went to the happy hunting ground, too soon (44)
My KZ is now called Eric and he will ride and protect me!
x God Bless x
Replied by steelhorseangel on topic kz750 ltd h2 1981- modern tires/pressures
hi kzr's
thank you for your replies.
my bike is a complete restore, except for the engine.
this a gem of a find 6,600 on a 1981. sadly
no safety labels attached. all powder coated off.
i found the tire pressures from the original owners
manual, page 81.
this is why i'm confused riders!
cheers buddies.
regards.
angel - uk
thank you for your replies.
my bike is a complete restore, except for the engine.
this a gem of a find 6,600 on a 1981. sadly
no safety labels attached. all powder coated off.
i found the tire pressures from the original owners
manual, page 81.
this is why i'm confused riders!
cheers buddies.
regards.
angel - uk
Angel
Restore, Wrench & Ride!
Brought up with Dad, brother, all riders!
Our Dad (Eric) taught us both simple mechanics
before he went to the happy hunting ground, too soon (44)
My KZ is now called Eric and he will ride and protect me!
x God Bless x
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- bountyhunter
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03 Feb 2012 02:55 #501690
by bountyhunter
1979 KZ-750 Twin
Replied by bountyhunter on topic kz750 ltd h2 1981- modern tires/pressures
Just checked the manual on my 1979 KZ750: pressure is 28 psi front, 32 psi rear.
1979 KZ-750 Twin
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- martin_csr
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03 Feb 2012 09:46 - 19 Feb 2013 12:54 #501714
by martin_csr
Last edit: 19 Feb 2013 12:54 by martin_csr.
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- SPARKY47
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- 1980 KZ500 B2
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03 Feb 2012 18:24 #501807
by SPARKY47
1980 KZ500 B2
Location: Middle England[/b
Replied by SPARKY47 on topic kz750 ltd h2 1981- modern tires/pressures
My pressures(z500b) front:28psi (dunlop f7)
rear:36-40 (dunlop tt100)
Dry weight 192kg (422 lbs)
At least that's what the factory bible says.
Oh and Martin_csr I think you'll find he's a she.
rear:36-40 (dunlop tt100)
Dry weight 192kg (422 lbs)
At least that's what the factory bible says.
Oh and Martin_csr I think you'll find he's a she.
1980 KZ500 B2
Location: Middle England[/b
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- faffi
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04 Feb 2012 16:00 #502016
by faffi
1977 KZ650B1
1980 F1 engine
B1 3-phase alternator
B1 Points ignition
Replied by faffi on topic kz750 ltd h2 1981- modern tires/pressures
Current tyres are typically rated with 32 front and 36 PSI rear solo (36/42 for radials) due to more compliant rubber and construction. The higher pressure reduce wear by keeping the tyres cooler. However, the old tyres were generally stiffer in construction and also used less compliant rubber, hence the need for less pressure to ensure sufficient grip and comfort.
Most manufacturers have a fitment guide that also states recommended pressure for any given application.
Most manufacturers have a fitment guide that also states recommended pressure for any given application.
1977 KZ650B1
1980 F1 engine
B1 3-phase alternator
B1 Points ignition
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- steelhorseangel
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04 Feb 2012 16:16 #502021
by steelhorseangel
Angel
Restore, Wrench & Ride!
Brought up with Dad, brother, all riders!
Our Dad (Eric) taught us both simple mechanics
before he went to the happy hunting ground, too soon (44)
My KZ is now called Eric and he will ride and protect me!
x God Bless x
Replied by steelhorseangel on topic kz750 ltd h2 1981- modern tires/pressures
dear kzr
thank for your reply!
there is a lot of confusion about tire pressures.
so many conficting answers. too high or too low
makes riding dangerous. i will contact bridgestones
the tire manufacturers.
best wishes
Angel UK
thank for your reply!
there is a lot of confusion about tire pressures.
so many conficting answers. too high or too low
makes riding dangerous. i will contact bridgestones
the tire manufacturers.
best wishes
Angel UK
Angel
Restore, Wrench & Ride!
Brought up with Dad, brother, all riders!
Our Dad (Eric) taught us both simple mechanics
before he went to the happy hunting ground, too soon (44)
My KZ is now called Eric and he will ride and protect me!
x God Bless x
Please Log in or Create an account to join the conversation.
- DoubleDub
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04 Feb 2012 17:23 #502031
by DoubleDub
Replied by DoubleDub on topic kz750 ltd h2 1981- modern tires/pressures
Maybe it's imperial pounds?
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