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Author Topic: KZ 750 Twin - Two point zero  (Read 58812 times)

Offline MotorbikeBruno

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Re: KZ 750 Twin - Two point zero
« Reply #130 on: May 31, 2016, 21:39:22 »

Lol, sure it works....it's just nowhere near running yet..  ha.     I'm working on the lathe motor mounts a bit today.  This four day weekend has been mostly shop time, lots of cleaning and organizing.  It's the only way I can get my head straight on my projects sometimes.   


Pm inbound on the side covers Desmo.

If you don't want the LTD 750t emblems...let me know. Looking for one in OK condition still. :)

Online canyoncarver

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Re: KZ 750 Twin - Two point zero
« Reply #131 on: Jun 01, 2016, 12:51:24 »
If you don't want the LTD 750t emblems...let me know. Looking for one in OK condition still. :)


I pm'd Desmo, I'm decided to pass on the covers.  I won't be doing stock style sidecovers any more on this one.  The iceberg just moved.
--
73' The Commando
YZF750/1000R The Fly
KZ 750 Twin
ZRX 1100
KZ400 The Rabbit
KLR650, 69' Norton P11 Ranger, a 65' Atlas, a 60' BSA scrambler, 93" shovelhead chop, an 86' FXR, and an F9 Bighorn
more YZF750R's, more KZ's, a Zephyr750...and the ever unfinished 75' CB550 cafe.
--

Online canyoncarver

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Re: KZ 750 Twin - Two point zero
« Reply #132 on: Jun 20, 2016, 22:52:54 »
Just figured out that Megacycle makes cams for the KZ Twin.

--
73' The Commando
YZF750/1000R The Fly
KZ 750 Twin
ZRX 1100
KZ400 The Rabbit
KLR650, 69' Norton P11 Ranger, a 65' Atlas, a 60' BSA scrambler, 93" shovelhead chop, an 86' FXR, and an F9 Bighorn
more YZF750R's, more KZ's, a Zephyr750...and the ever unfinished 75' CB550 cafe.
--

Offline Nebr_Rex

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Re: KZ 750 Twin - Two point zero
« Reply #133 on: Jun 20, 2016, 23:53:23 »
Have you thought about pistons?


.

Offline Armaundk

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Re: KZ 750 Twin - Two point zero
« Reply #134 on: Jun 21, 2016, 06:04:22 »
Just figured out that Megacycle makes cams for the KZ Twin.

This is gold...gold!


Sent from my iPad using Tapatalk

Online canyoncarver

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Re: KZ 750 Twin - Two point zero
« Reply #135 on: Jun 21, 2016, 11:40:26 »
Have you thought about pistons?.
I've been thinking about it but haven't decided yet.  I've been finding some interesting hop up threads.


http://kzrider.com/forum/2-engine/111894-big-bore-for-kz750
--
73' The Commando
YZF750/1000R The Fly
KZ 750 Twin
ZRX 1100
KZ400 The Rabbit
KLR650, 69' Norton P11 Ranger, a 65' Atlas, a 60' BSA scrambler, 93" shovelhead chop, an 86' FXR, and an F9 Bighorn
more YZF750R's, more KZ's, a Zephyr750...and the ever unfinished 75' CB550 cafe.
--

Online canyoncarver

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Re: KZ 750 Twin - Two point zero
« Reply #136 on: Jun 21, 2016, 11:50:03 »
This is gold...gold!


Neat eh?  I'm wondering how hard to get a hold of they are.
--
73' The Commando
YZF750/1000R The Fly
KZ 750 Twin
ZRX 1100
KZ400 The Rabbit
KLR650, 69' Norton P11 Ranger, a 65' Atlas, a 60' BSA scrambler, 93" shovelhead chop, an 86' FXR, and an F9 Bighorn
more YZF750R's, more KZ's, a Zephyr750...and the ever unfinished 75' CB550 cafe.
--

Offline Nebr_Rex

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Re: KZ 750 Twin - Two point zero
« Reply #137 on: Jun 21, 2016, 22:18:44 »
I've been thinking about it but haven't decided yet.  I've been finding some interesting hop up threads.


http://kzrider.com/forum/2-engine/111894-big-bore-for-kz750

I've thought about the use of a 80mm KZ1000 piston. Knowing the rod would have to be bushed because of the different pin diameter.
Only the pin height is unknown.


.

Online canyoncarver

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Re: KZ 750 Twin - Two point zero
« Reply #138 on: Jun 21, 2016, 22:39:04 »

That's kinda cool.

--
73' The Commando
YZF750/1000R The Fly
KZ 750 Twin
ZRX 1100
KZ400 The Rabbit
KLR650, 69' Norton P11 Ranger, a 65' Atlas, a 60' BSA scrambler, 93" shovelhead chop, an 86' FXR, and an F9 Bighorn
more YZF750R's, more KZ's, a Zephyr750...and the ever unfinished 75' CB550 cafe.
--

Offline doc_rot

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Re: KZ 750 Twin - Two point zero
« Reply #139 on: Jun 22, 2016, 17:18:12 »
I have been doin some research into a couple options for bigger pistons.
The YFM350R has a 19mm wrist pin and the 83mm overbore pistons available for it would bump the 750t to 865cc. the pistons look very similar to the stock 750 pistons and can be had for pretty cheap. i dont know what this would do to compression.
http://www.ebay.com/itm/Namura-Piston-Kit-2004-2013-Yamaha-Raptor-350-YFM350R-Standard-Bore-83mm-/291774199439?fits=Make%3AYamaha%7CModel%3ARaptor+350

I personally would really like displacement to go over 900, and at this point it looks like custom pistons would be the way to go. 86mm pistons (8mm over) will give you 906cc. Someone on here tipped me off to Arias pistons, and when I contacted them they gave me a rough estimate of $150-$200 per piston with rings and pins, they have a minimum order of 4 pistons. discounts for volume. I have a junk motor that i need to pull apart to get some measurements from so i can get an exact quote. the upside of this is you can have them made exactly how you want, probably to work with the megacycle cams 8)

L.A. Sleeves has universal flanged sleeves that arent too expensive. they would be need to cut to length. I don't think you could go much bigger than the than the 86mm pistons because the sleeve has an OD of 92.3mm and the flange is 95.5mm. the flange would have to be trimmed down to not butt into the clyinder studs.
https://www.lasleeve.com/tech/all-purpose-sleeves

then there is the issue of a head gasket
« Last Edit: Jun 22, 2016, 17:23:09 by doc_rot »