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'76 KZ900 (ZRX1200R) Build

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27 Aug 2013 02:57 #603287 by geerbangr
Replied by geerbangr on topic '76 KZ900 (ZRX1200R) Build
Leon said when I'm ready he'll take care of me. :) So as time and funds allow me I'll get a street monster built.

1978 KZ 1000


I go by Jason

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27 Aug 2013 03:02 #603288 by geerbangr
Replied by geerbangr on topic '76 KZ900 (ZRX1200R) Build
Cory, did the zrx c

1978 KZ 1000


I go by Jason

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27 Aug 2013 03:05 #603289 by geerbangr
Replied by geerbangr on topic '76 KZ900 (ZRX1200R) Build
Cory, did the zrx component swap change the ride height ? If do how much ? Also,are you're fork tubes set flush with the top tree ? I'm not sure i want the rake from front to back. I love the stance of a zrx almost zero raked from front to back.

1978 KZ 1000


I go by Jason

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27 Aug 2013 12:25 #603330 by NakedFun
Replied by NakedFun on topic '76 KZ900 (ZRX1200R) Build
Yes the forks are flush with the tops of the triples. I did not measure the height prior to the change so I can't comment on height with numbers. It "feels" the Ashe when I sit on it if that helps. One big difference is going to the shorter 17" wheel and tire combination which you will lose some height there. You can affect rake by placing the rear upper shock mounts where you want. I measured the geometry vs. my ZRX and set them almost identically except a slight difference due to an interference problem with the KZ frame tubes.

Cory

2008 Kawasaki Concours 14
1999 Kawasaki ZRX1100
1976 Kawasaki KZ900

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23 Sep 2013 12:26 #607436 by NakedFun
Replied by NakedFun on topic '76 KZ900 (ZRX1200R) Build
So I didn't get as much as I wanted done this weekend, but getting closer to to mounting up wheel and cutting side spacers. I did get my rear wheel inner bearing spacer made, but I spent the majority of the time cutting my inner sprocket adapter for my cush drive. A long time getting things very precise for no play in it.

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Now, I am not a machinist, but I wanted to get some opinions from those who are. I was shooting for .001" clearance between the OD of the adapter ring and the ID of the sprocket bore. On my last pass, I screwed up and ended up with .002" clearnace in the diameter between the two. It is just enough that you can "feel" or "sense" movement between the two. is this going to be ok, or is this too much clearance? I have a .0015" interference fit for the double row bearing that will be pressed in, so I am wondering if I would get some expansion of the collar once the bearing goes in? Thoughts?

Cory

2008 Kawasaki Concours 14
1999 Kawasaki ZRX1100
1976 Kawasaki KZ900

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23 Sep 2013 16:40 #607462 by 531blackbanshee
Replied by 531blackbanshee on topic '76 KZ900 (ZRX1200R) Build
you should be fine cory.
the sprocket mfgs. prolly have at least that much tolerance.

thats my .02,

leon

skiatook,oklahoma 1980 z1r,1978 kz 1000 z1r x 3,
1976 kz 900 x 3
i make what i can,and save the rest!

billybiltit.blogspot.com/

www.kzrider.com/forum/5-chassis/325862-triple-tree-custom-work

kzrider.com/forum/5-chassis/294594-frame-bracing?limitstart=0

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23 Sep 2013 19:51 #607476 by 79MKII
Replied by 79MKII on topic '76 KZ900 (ZRX1200R) Build
....you mean, that's my .002" :silly:

I agree...can't imagine a tighter tolerance than .002" on those sprockets or they'd cost a lot more.

The Kaw List:
Current: 79 KZ1000 A3 MKII, 78 KZ1000 A2, 78 KZ1000 Z1-R, 78 KZ650 SR, 80 KE175
Former: 03 KLX400SR, 99 ZRX1000, 82 KZ750 LTD, 80 KZ1000 A4 MKII, 80 KZ1000 LTD, 78 KZ1000 A2, 74 H-2 750 Triple, 78 KL250

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23 Sep 2013 20:17 #607481 by NakedFun
Replied by NakedFun on topic '76 KZ900 (ZRX1200R) Build
Well I am going to leave it then. Now to drill the bolt pattern, spot mill the back side at at each hole, and press in the studs. Then press the bearings in the wheels and come into the home stretch. Got to whittle a brake rotor adapter disc and cut my front brake rotor spacers down.

Cory

2008 Kawasaki Concours 14
1999 Kawasaki ZRX1100
1976 Kawasaki KZ900

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24 Sep 2013 09:36 #607567 by 531blackbanshee
Replied by 531blackbanshee on topic '76 KZ900 (ZRX1200R) Build
it is amazing how much time all of the hand fitting/fabricating takes.

good job,keep up the good work.

leon

skiatook,oklahoma 1980 z1r,1978 kz 1000 z1r x 3,
1976 kz 900 x 3
i make what i can,and save the rest!

billybiltit.blogspot.com/

www.kzrider.com/forum/5-chassis/325862-triple-tree-custom-work

kzrider.com/forum/5-chassis/294594-frame-bracing?limitstart=0

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24 Sep 2013 12:35 #607589 by NakedFun
Replied by NakedFun on topic '76 KZ900 (ZRX1200R) Build
Thanks Leon for the inspiration. Hoping based on the budgeting my wife and I have done, that will be able to finish the bike and put it on the road in May. I wish I was a machinist, but I tend to get better the more practice I get. This bike is giving me plenty of practice......

Cory

2008 Kawasaki Concours 14
1999 Kawasaki ZRX1100
1976 Kawasaki KZ900

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24 Sep 2013 15:30 #607606 by 531blackbanshee
Replied by 531blackbanshee on topic '76 KZ900 (ZRX1200R) Build
you spend enough time standing next to them machines cory and you will be a machinist :evil: !!!


leon

skiatook,oklahoma 1980 z1r,1978 kz 1000 z1r x 3,
1976 kz 900 x 3
i make what i can,and save the rest!

billybiltit.blogspot.com/

www.kzrider.com/forum/5-chassis/325862-triple-tree-custom-work

kzrider.com/forum/5-chassis/294594-frame-bracing?limitstart=0

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25 Sep 2013 17:31 #607757 by NakedFun
Replied by NakedFun on topic '76 KZ900 (ZRX1200R) Build
Side note to the conversation about the bore to collar fit. Spoke with JT Sprocket's technical department and the ID tolerance of the sprocket bore for the JT488 is +/- 0.10mm or .0039". My current .002" is less than their manufacturing limit. Just hope I never get a sprocket from them that is heavy on the + side then I'll have a tolerance of .0059"...

Cory

2008 Kawasaki Concours 14
1999 Kawasaki ZRX1100
1976 Kawasaki KZ900

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