27 mm socket? kz900 front sprocket nut????
- trianglelaguna
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27 mm socket? kz900 front sprocket nut????
02 Jun 2013 21:31 - 11 Jun 2013 01:36
No eBay APP ID and/or Cert ID defined in Kunena configurationgot a new chain and sprockets for my 900...i know i don't have the right size socket anymore....gonna buy one....27mm right? 1/2 inch drive i do have and torque wrench...just need the right socket
1976 KZ900
2003 ZX12R
2007 FZ1000
2004 ninja 250R for wife
2003 ZX12R
2007 FZ1000
2004 ninja 250R for wife
Last edit: 11 Jun 2013 01:36 by KZQ.
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- 821000ltd
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Re: 27 mm socket? kz900 front sporket nut????
02 Jun 2013 22:04
That is the one you need. I got one in the top of my tool box that I used once.
If shipping wasn't so much I would just send it.
If shipping wasn't so much I would just send it.
82 KZ1000 LTD
Kerker 4 to 1
80 KZ 250
Kerker 4 to 1
80 KZ 250
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- trianglelaguna
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Re: 27 mm socket? kz900 front sporket nut????
02 Jun 2013 23:45
thanks...no worries but nice thought...i need to buy one anyway...less than pizza....thanks for the reply...ordering now
1976 KZ900
2003 ZX12R
2007 FZ1000
2004 ninja 250R for wife
2003 ZX12R
2007 FZ1000
2004 ninja 250R for wife
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- trianglelaguna
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Re: 27 mm socket? kz900 front sproket nut????
08 Jun 2013 23:03 - 08 Jun 2013 23:04no...no...no...the front sprocket nut on a kz 900 is 1 1/4" by7 my tape...
NOT NOT NOT 27mm....which is btw 1.06299 inches
ordered one 27 mm..went to work on the bike.wrong!!!!!
1976 KZ900
2003 ZX12R
2007 FZ1000
2004 ninja 250R for wife
2003 ZX12R
2007 FZ1000
2004 ninja 250R for wife
Last edit: 08 Jun 2013 23:04 by trianglelaguna.
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- racer54
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Re: 27 mm socket? kz900 front sproket nut????
09 Jun 2013 00:44
Since when did the japanese start using standard size hardware?
1980 LTD (changed over the years), 1979 LTD (being rebuilt), 1977 KZ turbo and various KZ's in various states of build. KLX110
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- trianglelaguna
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Re: 27 mm socket? kz900 front sproket nut????
09 Jun 2013 01:01
i just used my tape to measure...i remember my neighbor had a big socket box for heavy equipment and he had loaned me a 1" and something socket for my MKII ...but it was few years ago so posted this thread before buying a socket online...1 1/4 is 35mm ???
Millimeters to inches
1 1/8"
30 mm
1 1/6"
32 mm
1 1/4"
35 mm
Millimeters to inches
1 1/8"
30 mm
1 1/6"
32 mm
1 1/4"
35 mm
1976 KZ900
2003 ZX12R
2007 FZ1000
2004 ninja 250R for wife
2003 ZX12R
2007 FZ1000
2004 ninja 250R for wife
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- trianglelaguna
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Re: 27 mm socket? kz900 front sproket nut????
09 Jun 2013 01:02
anyone here know waht size socket for the nut in question
1976 KZ900
2003 ZX12R
2007 FZ1000
2004 ninja 250R for wife
2003 ZX12R
2007 FZ1000
2004 ninja 250R for wife
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- bluej58
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Re: 27 mm socket? kz900 front sproket nut????
09 Jun 2013 09:26
I just checked the nut on my spare KZ900 output shaft and it is indeed a 27mm, and so is the one on our 78 KZ650 engine.
That nut of yours looks nasty.
JD
That nut of yours looks nasty.
JD
78 KZ1000 A2A
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- trianglelaguna
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Re: 27 mm socket? kz900 front sprocket nut????
09 Jun 2013 10:51
thanks for the link I may just order the new nut and washer monday...thank you
1976 KZ900
2003 ZX12R
2007 FZ1000
2004 ninja 250R for wife
2003 ZX12R
2007 FZ1000
2004 ninja 250R for wife
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- steell
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Re: 27 mm socket? kz900 front sprocket nut????
09 Jun 2013 12:43
1" = 25.4mm
1 1/6" = 27mm
1 1/8" = 28.5mm
1 1/4" = 31.5mm
1mm = .040" roughly, good for mental calculations
1/16" = .0625"
1/8" = .125"
1/4" = .250"
1" = 25.4mm because Congress passed a law making it so
1 1/6" = 27mm
1 1/8" = 28.5mm
1 1/4" = 31.5mm
1mm = .040" roughly, good for mental calculations
1/16" = .0625"
1/8" = .125"
1/4" = .250"
1" = 25.4mm because Congress passed a law making it so

KD9JUR
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- Patton
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Re: 27 mm socket? kz900 front sprocket nut????
09 Jun 2013 14:05 - 11 Jun 2013 09:16
Edited to conform with Jeff Saunders' post hereafter: 27mm is across the hex. 20mm is the thread.
The later KZ's came with a 30mm head on the nut. Both are 20mm thread.
20mm is the shaft thread size = internal thread size of the nut.
The socket size to fit the nut is measured as distance between the flats, same as an open end wrench.
1¼" between the flats would be about 31.75 millimeters.
Depends, of course, on accuracy of the measurement between flats.
Measuring in millimeters (with a caliper) would be the better choice for determining metric socket size.
Important to use the correct snuggest fitting socket, due to the sometimes extreme force required to loosen the nut.
If the 1¼" inch socket fits without undue slop, it may work okay, but could try a 1 3/16" socket -- which equates to 1.1875" or 30.1625mm -- on a 30mm nut.
Good Fortune!
The later KZ's came with a 30mm head on the nut. Both are 20mm thread.
20mm is the shaft thread size = internal thread size of the nut.
The socket size to fit the nut is measured as distance between the flats, same as an open end wrench.
1¼" between the flats would be about 31.75 millimeters.
Depends, of course, on accuracy of the measurement between flats.
Measuring in millimeters (with a caliper) would be the better choice for determining metric socket size.
Important to use the correct snuggest fitting socket, due to the sometimes extreme force required to loosen the nut.
If the 1¼" inch socket fits without undue slop, it may work okay, but could try a 1 3/16" socket -- which equates to 1.1875" or 30.1625mm -- on a 30mm nut.
Good Fortune!

1973 Z1
KZ900 LTD
KZ900 LTD
Last edit: 11 Jun 2013 09:16 by Patton.
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