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Japanese Bikes, Build Threads & How-To’s Build threads, tech Q&A and conversations centered around custom-built motorcycles from the Land of the Rising Sun

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Old 07-22-2012   #1
 
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Voodoo Vintage Custom KZ1000p Chop

Okay... So Brian Thompson out of San Antonio, TX approached us with his request for a custom hard tail for his KZ100 Police Special.

Now, granted the fact that we LOVE singles and twins, we're not about to pass up a learning experience. And let me say... After tons of XS650, Suzuki Savage, CB, and Triumph builds... The KZ1000 seems like a freakin' MONSTER sitting in the jig! Damn!

We started with your basic (but very clean - thank you Brian!) KZ100p in the cradle...



Next stop was our HIGH-TECH alignment system...







Let the chopping begin! Here are the locations of the cuts required to remove the rear loop in one piece.



After a lot of though... We didn't bother removing the stock neck gusset. There's a ton of support structure hidden under there and I didn't want to open a can-o-worms if it wasn't necessary. Our thoughts are this: It's going to "blend" in to the lines of the tank regardless if it's replaced with a custom gusset.



A couple well placed cuts and CHAZAM! Just got an ass reduction!



Lower rails were cut 6-1/2" from the rear of the lower control mounts...



After everything was removed, we provided Brian with a computer Mock Up of his intended build for his approval...



And... Just to make Brian crap his pants... I sent this photo showing another weld-on hard tail design of ours!!! The dude almost called my bluff and went with it!



Shortly after, I sent him the photo of his ACTUAL hard tail mocked in place.













Guess what!... It didn't meet his request! Brian specifically wants to mount his rear caliper BETWEEN the upper and lower struts directly forward of the axle. That's what I get for NOT READING MY NOTES!!!

Soooo..... We re-designed the rear axle plates to accommodate enough room so the stock caliper has travel from the rear to the foremost position of the axle slot and threw a couple ideas his way. The only way to provide enough space for the caliper and retain all the entry angles was to lose a couple inches of stretch...



And then it hit me... WTF am I thinking??? Just "span" the axle plate you freakin' retarded bastard!!!



So... After some trial and error... We've cut and cleaned the axle plates and are ready to start bending and notching our tubes...



We'll post some more as we go until we've reached a full roller and hopefully Brian will assume this thread for future reference??

Oh... Anybody want to purchase a nice KZ1000p weld on hard tail for $250? Ha ha ha!!!! Seriously though... Anyone?
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Old 07-22-2012   #2
 
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That's gonna have a nice stance.

That's also a good deal for the first hard tail.
But I do like the idea of tucking the caliper in to clean up the look.
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Old 07-22-2012   #3
 
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Dam nice work, I live in San Antonio be nice to see the ride out on the road. Any idea if that hard tail would fit 81kz750 ltd?
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Old 07-22-2012   #4
 
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Personally... I would run it just south of the lower rail. I like the look of tight angles at the axle plate so that it appears as if the upper and lower struts intersect at the axle.

But... Brian is paying for it, so... He's got some really good ideas and I'm sure he'll make it look fantastic!

It's got ME thinking of throwing down for a KZ1000P next time I run across one. And... Next time I have any spare cash! Might be a while...
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Old 07-22-2012   #5
 
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Quote:
Originally Posted by truerobotech View Post
Dam nice work, I live in San Antonio be nice to see the ride out on the road. Any idea if that hard tail would fit 81kz750 ltd?
I'm pretty sure it would not. However... The frame is the same basic "loop" design and could easily be hard tailed with the proper measurements. We would LOVE to put the KZ750 on the menu at some point!

Are you hinting about another "project"??? Ha ha ha!
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Old 07-22-2012   #6
 
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Quote:
Originally Posted by voodoovintage View Post
I'm pretty sure it would not. However... The frame is the same basic "loop" design and could easily be hard tailed with the proper measurements. We would LOVE to put the KZ750 on the menu at some point!

Are you hinting about another "project"??? Ha ha ha!
Ha ha never know I'll be watching Brians build for sure.
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Old 07-22-2012   #7
 
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I would love to develop a frame for the old KZ750 twin! Good luck finding one of those, right!...
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Old 07-22-2012   #8
 
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wanna hardtail a vulcan?
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Old 07-23-2012   #9
 
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Quote:
Originally Posted by ATXzombie View Post
wanna hardtail a vulcan?
I'd love to! Hell... I'd hard tail a VW Bug if I could!

From your name, I gather you're in Austin?
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Old 08-06-2012   #10
 
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It's slow going... But finally got a little more work done!

The following shot shows the side profile with the rear fender and seat mocked up...


After removing all that jazz going on up there on the neck gusset...


The all time classic - PAPER TEMPLATE!


Scanned and ready to put through the CADCAM


The new neck gussets cut from 10ga


The new neck gusset cleaned, bent, and welded in place!


Drilling the anchor holes in the neck gusset and lower frame rails


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Old 08-07-2012   #11
 
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wow - I am always impressed to see builds like this. True craftsmanship in every way
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Old 08-07-2012   #12
 
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Nice work. Really simple, clean looking hardtail.
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Old 08-07-2012   #13
 
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Thank you guys! It's been a while since I've worked on anything bigger than 750cc!

Side-to-side, this thing is a monster!!!

Had to re-jig from 8.5" to 9.25" interior frame...

I've got some KZ750 DOHC builds coming up, but I'm REALLY jonesin' for a 750 twin!
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Old 08-08-2012   #14
 
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Super cool, really nice work!
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Old 08-08-2012   #15
 
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Awesome work man...looks really good

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Old 08-09-2012   #16
 
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ive been wanting a hardtail for my kz650, how much does one of yalls hardtailing's run?
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