collapse

www.dimecitycycles.com

https://www.townmoto.com/collections/vanson-leathers


www.restocycle.com

www.CITYLIMITMOTO.com

www.jadusmotorcycleparts.com

www.bisonmotorsports.com

www.speedmotoco.com

www.lostapostlejewelry.com

www.cognitomoto.com

www.sparckmoto.com

www.pistonsociety.com

www.steeltowngarage.com


Author Topic: saving a 1980 KZ750 twin  (Read 62326 times)

Offline irk miller

  • DTT SUPPORTER
  • *
  • DTT BOTM WINNER
  • *
  • Posts: 7998
  • You've been mostly-dead all day.
Re: saving a 1980 KZ750 twin
« Reply #430 on: Jun 28, 2018, 20:56:24 »
Meh, Scotchbrite and a lathe will clean that piston up just fine.  :-*

Offline doc_rot

  • DTT BOTM WINNER
  • *
  • DTT SUPPORTER
  • *
  • Posts: 1107
  • Oh the usual... I bowl, I drive around...
Re: saving a 1980 KZ750 twin
« Reply #431 on: Jun 30, 2018, 19:09:44 »
Decided to go all in on the engine rebuild. got some cool mods in mind as well. stay tuned.

Offline irk miller

  • DTT SUPPORTER
  • *
  • DTT BOTM WINNER
  • *
  • Posts: 7998
  • You've been mostly-dead all day.
Re: saving a 1980 KZ750 twin
« Reply #432 on: Jun 30, 2018, 20:33:22 »
In a way, I kinda love being forced into a rebuild and bigger bore.  Excuses make it go down easier, and supping a motor up is never a letdown.

Offline canyoncarver

  • DTT SUPPORTER
  • *
  • Posts: 3597
  • 'hacking is learning'
Re: saving a 1980 KZ750 twin
« Reply #433 on: Jul 01, 2018, 20:36:13 »
Decided to go all in on the engine rebuild. got some cool mods in mind as well. stay tuned.

Right on!.  There's a strong chance I'll have to do the same when I get back into mine.  I look forward to the details of your build.
--

YZF750/1000R The Fly
KZ 750 Twin
ZRX 1100
KZ400 The Rabbit
KLR650, 65 Norton, my never finished shovelhead chopper, 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

  • DTT BOTM WINNER
  • *
  • DTT SUPPORTER
  • *
  • Posts: 1107
  • Oh the usual... I bowl, I drive around...
Re: saving a 1980 KZ750 twin
« Reply #434 on: Jul 06, 2018, 05:35:16 »
Finally got the easy win I was looking for. New EBC single disk setup. Shaved 4 pounds off rotational mass and an additional 2.5 unsprung with the removal of the extra caliper. I bought a 12mm brembo MC to match. The fitment is super tight. less than 1mm on spoke/caliper and disk/fork leg. I'm digging the new look. Very interested to see how it feels.
« Last Edit: Jul 06, 2018, 05:47:22 by doc_rot »

Online Pete12

  • Posts: 255
Re: saving a 1980 KZ750 twin
« Reply #435 on: Jul 06, 2018, 08:27:03 »
Wow, that front wheel looks great, should be no problem pulling that bike up.

Offline beachcomber

  • DTT SUPPORTER
  • *
  • Posts: 3973
  • TJ - Beachcomber
Re: saving a 1980 KZ750 twin
« Reply #436 on: Jul 06, 2018, 08:33:54 »
Venolia pistons - how much ?

My exhaust cam is off to be modded [ remove gear ] and will come back as an inlet !!!

Just waiting to get my new HD compressor and blast cabinet installed - then it's into engine mod mode !  ;D First job is to strip the new twin plug head down and get some blueprinting done. What do you guys use for valve springs ?

There WILL be two donkeys - one will be the Weber / NOS version and the second more long term [ money ! ] will be the blown version. Probably Turbo as the Eaton conversion will rely totally on the good grace of others for machining fab etc.
"if at first you don't succeed, you've already been a failure once"

" we're not going back to the sixties - we never left "

"yep, nostalgia ain't what it used to be"

"I used to be indecisive - now I'm not so sure"

Offline doc_rot

  • DTT BOTM WINNER
  • *
  • DTT SUPPORTER
  • *
  • Posts: 1107
  • Oh the usual... I bowl, I drive around...
Re: saving a 1980 KZ750 twin
« Reply #437 on: Jul 06, 2018, 13:20:54 »
Venolia pistons - how much ?

I got them used from a member over at KZR for $150


What do you guys use for valve springs ?

stock springs. if I had a higher lift cam I would get some custom springs made by Kibblewhite.


Offline 1fasgsxr

  • Posts: 1498
Re: saving a 1980 KZ750 twin
« Reply #438 on: Jul 06, 2018, 13:25:35 »
Love the new set up.  Looks great.  That's about what I want on the 350F. The stock rotor on it is heavy.
http://www.dotheton.com/forum/index.php?topic=41083.0

Life is a journey from the maternity ward to the crematorium....

Offline doc_rot

  • DTT BOTM WINNER
  • *
  • DTT SUPPORTER
  • *
  • Posts: 1107
  • Oh the usual... I bowl, I drive around...
Re: saving a 1980 KZ750 twin
« Reply #439 on: Jul 06, 2018, 14:00:32 »
Love the new set up.  Looks great.  That's about what I want on the 350F. The stock rotor on it is heavy.
this rotor is about 2.5lbs lighter than the stock single.