750 R1 steering stem compatibility

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06 May 2020 04:33 #825099 by 750 R1
750 R1 steering stem compatibility was created by 750 R1
Hi Folks, can someone tell me what other models share the same steering stem as the GPZ750 R1, I'm doing a front end swap and need a stem to press into the new front end, i'd like to keep the R1 front end i have in one piece if possible...

Thanks

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06 May 2020 08:52 - 06 May 2020 08:56 #825114 by martin_csr
Replied by martin_csr on topic 750 R1 steering stem compatibility
Assuming this is a 1982 KZ750-R1. From the diagrams at Partzilla the cross-references lists the 84 KZ700, 83 KZ750-L3 & the R1. I'd guess the other 750L models (non-USA) might also have the same steering stem. or at least 1 or 2 of them.

Click the part number for the x-ref.
www.partzilla.com/catalog/kawasaki/motor...-kz750-r1/front-fork
Last edit: 06 May 2020 08:56 by martin_csr.
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06 May 2020 10:21 - 06 May 2020 10:47 #825127 by F64
Replied by F64 on topic 750 R1 steering stem compatibility
Not sure if this will help.This list shows bearing sizes for stems.
Wish I knew who originally put the list together.

www.dotheton.com/index.php?threads/steer...ng-sizes-list.20951/

Martin had a better idea to really get the exact stem for that front end.

81-KZ440-D2.
Louis Dudzik's GM HEI ignitor conversion installed 2015 s3.amazonaws.com/gpzweb/Ignition/GPZgmHEImod.html
Motogadget m-unit blue installed 2017.
LIC, NY
Last edit: 06 May 2020 10:47 by F64.
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06 May 2020 11:36 - 06 May 2020 11:37 #825137 by martin_csr
Replied by martin_csr on topic 750 R1 steering stem compatibility
I don't know about that bearing list, but All Balls Racing has a Fork Conversion page.

www.allballsracing.com/forkconversion
Last edit: 06 May 2020 11:37 by martin_csr.
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06 May 2020 15:05 #825147 by 750 R1
Replied by 750 R1 on topic 750 R1 steering stem compatibility
Thanks guys, I'm having no trouble finding bearings, I have a contact in a bearing shop so that's covered. My main problem if finding a suitable stem here in Australia, I was hoping the gpz 750 83-85 unitrack had the same stem as they are fairly common here. A 30 dollar lower stem in the US ends up being around 100 dollars by the time i get it shipped here, I'm just trying to avoid that....

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06 May 2020 17:51 #825152 by F64
Replied by F64 on topic 750 R1 steering stem compatibility
It wasn't so much about finding bearings. It was about finding stems that had at least the same diameter as your stem.
The lower bearing diameter may match your lower triple clamp stem hole diameter, but not necessarily.
If they match, then they can be pressed together. Length is a different story and is very important. We don't have those specs for you yet.

It's hard finding a direct source of the info you require so we have to piece it together. Hence, the inclusion of bearing charts.

81-KZ440-D2.
Louis Dudzik's GM HEI ignitor conversion installed 2015 s3.amazonaws.com/gpzweb/Ignition/GPZgmHEImod.html
Motogadget m-unit blue installed 2017.
LIC, NY

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06 May 2020 18:55 #825156 by 750 R1
Replied by 750 R1 on topic 750 R1 steering stem compatibility
I fully understand, I was going to use the stem on the showa front end i'm using but its too short, It wasn't hard to find bearings to suit that either. To make the Kawasaki stem fit the clamps I have i need to make a collar to widen the bottom of the Kawasaki stem so it will press into the alloy bottom clamp I'm using, We'll probably use a grub screw to make sure it stays put, anyway, I'll get to that when I find a Kawasaki stem, I may have to use the one I have in the complete R1 front end and find a replacement at a later date. I appreciate the help

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