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GPZ Unitrak 1100

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RALPHARAMA
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GPZ Unitrak 1100

#1 PostAuthor: RALPHARAMA » Sat Feb 08, 2014 4:36 pm

I'm looking for a set of good bushes that go inside the needle rollers on the swinging spindle of my '83 GPZ1100A1 uni

They look like this when they're fucked :evil:

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From memory I think the ID is 15mm OD is 25 and length 37 . I'd spin some up on the lathe but they're hardened and ground :(
Ralph Ferrand
Z1000A1 (1977), Z1300A5 (1983), Z900A4 (1976) GPZ1100 Unitrak (1983)(project), RD250B (1975)(project), ZRX1200R (2005) DT175MX (1981) YZF R6 (1999)
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#2 PostAuthor: pluto » Sun Feb 09, 2014 7:01 pm

Mine were similarly shot, tried every where no longer available from Kawasaki, got them made in stainless steel and bought needle rollers from simplybearings.co.uk with genuine seals (still available) works a treat. The dimensions are on the cmnsl website
Dave

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#3 PostAuthor: jonhunt » Sun Feb 09, 2014 7:52 pm

if these are what the bearing runs on they need to have a hardened surface I doubt stainless will last that long. HRC 58-64

www.ntn.co.jp/english/products/pdf/need ... pdf‎

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#4 PostAuthor: pluto » Sun Feb 09, 2014 7:56 pm

Depends on how much lube and how few miles you do!

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#5 PostAuthor: jonhunt » Mon Feb 10, 2014 9:14 am

You need lube but it won't help with the load. Yep if you dont ride it it will never break :lol:

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#6 PostAuthor: RALPHARAMA » Mon Feb 10, 2014 9:50 am

I can easily spin some up in stainless, but as Jon rightly points out, they need to be hardened.
Ralph Ferrand

Z1000A1 (1977), Z1300A5 (1983), Z900A4 (1976) GPZ1100 Unitrak (1983)(project), RD250B (1975)(project), ZRX1200R (2005) DT175MX (1981) YZF R6 (1999)

http://www.bikerstoolbox.co.uk

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#7 PostAuthor: pluto » Mon Feb 10, 2014 3:53 pm

My reasoning is I will be lucky to do 1000 miles on it each year, if it wears out in that time I sort out another one. It's got a bolt running through it so I can't believe it will snap so the only issue is reduced lifespan. Seeing as Kawasaki probably had to over engineer them incase of neglect (which they all were - so finding a good second hand one is unlikely) a reduced spec item that keeps the bike on the road has to be a sensible option - doesn't it? Or am I risking a catastrophic suspension failure?
Either way, if you find a way of making some hardened steel items perhaps you could make me some too - I would need both smaller diameter spacers, the big one is in good shape.
Good luck
Dave :D

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#8 PostAuthor: tlc » Mon Feb 10, 2014 5:30 pm

Fork rechrome specialists will be able to sort them surely?
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#9 PostAuthor: RALPHARAMA » Mon Feb 10, 2014 6:01 pm

Luckily I have managed to source one from Cradley and one is OK so I'm sorted for the time being :)
Ralph Ferrand

Z1000A1 (1977), Z1300A5 (1983), Z900A4 (1976) GPZ1100 Unitrak (1983)(project), RD250B (1975)(project), ZRX1200R (2005) DT175MX (1981) YZF R6 (1999)

http://www.bikerstoolbox.co.uk

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#10 PostAuthor: jonhunt » Mon Feb 10, 2014 7:39 pm

by the way the technical term for f&*ked is false brunelling caused by small movements back & forth that removes the lube & wears the surface. Just being a smart arse

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#11 PostAuthor: RALPHARAMA » Thu Feb 13, 2014 1:43 pm

jonhunt wrote:by the way the technical term for f&*ked is false brunelling caused by small movements back & forth that removes the lube & wears the surface. Just being a smart arse


I know and understand the cause and result of this phenomena, though I didn't know the technical term to which you refer, but can assure you that all engineers, regardless of professional speciality, will be fully conversant with the term 'fucked'. I therefore would humbly suggest that when conveying the overall condition of a part, my use of the vernacular, is probably better use of the language, particularly as the Z1OC is unlikely to have a second member with any knowledge or understanding of the term 'false brunelling', whereas I bet close to 100% know what I mean when I say 'it's fucked' :lol:

Yeah - I speak smart arse too :lol:
Ralph Ferrand

Z1000A1 (1977), Z1300A5 (1983), Z900A4 (1976) GPZ1100 Unitrak (1983)(project), RD250B (1975)(project), ZRX1200R (2005) DT175MX (1981) YZF R6 (1999)

http://www.bikerstoolbox.co.uk

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#12 PostAuthor: Taffus » Thu Feb 13, 2014 1:55 pm

Yep f*cked works as does googling the term to find the correct spelling :wink:
False_brinelling
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#13 PostAuthor: RALPHARAMA » Thu Feb 13, 2014 4:43 pm

That makes sense - it may derive from the dents made by the Brinell hardness testing method?
Ralph Ferrand

Z1000A1 (1977), Z1300A5 (1983), Z900A4 (1976) GPZ1100 Unitrak (1983)(project), RD250B (1975)(project), ZRX1200R (2005) DT175MX (1981) YZF R6 (1999)

http://www.bikerstoolbox.co.uk

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#14 PostAuthor: jonhunt » Thu Feb 13, 2014 7:58 pm

Finger trouble :D

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#15 PostAuthor: bigrocketrider » Sun Feb 16, 2014 9:41 am

http://www.ebay.co.uk/itm/Kawasaki-ZX11 ... 3a892b738e

There you go VDUK. Its in the states but if you need it..............


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