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Author Topic: 79 Kawasaki KZ650 - 8 minute video, 282 West, Pennsylvania  (Read 47362 times)

Offline SrgtBear

  • Posts: 842
  • The arsenic has oddly shaped feet...
I have to admit I really lucked out lately finding this bikes on the cheap.  First my XS500 for $200, and now this 79 Kawasaki KZ650 for $500.  Found sitting in a shed for the last 10 years.  No pitting on forks, mostly original, seat enacted with no holes in it.  Only some minor rust and patina with a frozen master cylinder. 

Nonetheless, this is my second time around on a bike build so I was easily able to get this bike started within an hour having it in my possession.  Below is a picture and video.

I haven't decided what I am going to do with her yet except get her functioning and riding good.

« Last Edit: Apr 10, 2017, 16:21:28 by SrgtBear »
Ted

Kawasaki Kaiju (怪獣) - 79 KZ650 - 700cc Bore Cam Rocket - http://www.dotheton.com/forum/index.php?topic=39748.0
75 Yamaha XS500B Cafe - Completed - http://www.dotheton.com/forum/index.php?topic=14392.0
74 Honda XL 125 - Original - http://www.dotheton.com/forum/index.php?topic=25706.0


Offline dmrhoades

  • Posts: 61
Re: KZ650: SrgtBear's New Project
« Reply #2 on: Jul 29, 2012, 00:36:13 »
Sweet!

Offline OneArmWillie

  • Posts: 86
Re: KZ650: SrgtBear's New Project
« Reply #3 on: Jul 29, 2012, 21:41:55 »
Ill always have a sift spot for these guys! My first bike. 1982!!
A Pussyeater for the Ages

Offline SrgtBear

  • Posts: 842
  • The arsenic has oddly shaped feet...
Re: KZ650: SrgtBear's New Project
« Reply #4 on: Aug 03, 2012, 17:09:59 »
Good news.  I popped off the timing cover to find this pleasant surprise already install.  Martek 440 Electronic Timing.  However I am running into an issue.  The bike idles and warms up fine and purrs in low rpms.  The bike then chokes when I give it throttle or start to rev higher then 2.5k.  My assumptions are clogged main jets, the Electronic Timing advance is not set right, or it could possibly be an air leak in the system.  Will keep you posted.  First step rebuild carbs and check compression.

Ted

Kawasaki Kaiju (怪獣) - 79 KZ650 - 700cc Bore Cam Rocket - http://www.dotheton.com/forum/index.php?topic=39748.0
75 Yamaha XS500B Cafe - Completed - http://www.dotheton.com/forum/index.php?topic=14392.0
74 Honda XL 125 - Original - http://www.dotheton.com/forum/index.php?topic=25706.0

Offline DreadRock

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Re: KZ650: Martek 440 Electronic Timing
« Reply #5 on: Aug 03, 2012, 17:15:55 »
If the this bike is done like your 500 its going to be one sweet ride ! I'll get the popcorn !!!!

Offline SrgtBear

  • Posts: 842
  • The arsenic has oddly shaped feet...
Re: 79 Kawasaki KZ650: Revin' it out! First test drive.
« Reply #6 on: Aug 05, 2012, 11:47:53 »
Fixed the throttle response issue.  Fired it up again and reved it out with a twist of the throttle.  Took it for its first test drive too.  See videos:

Ted

Kawasaki Kaiju (怪獣) - 79 KZ650 - 700cc Bore Cam Rocket - http://www.dotheton.com/forum/index.php?topic=39748.0
75 Yamaha XS500B Cafe - Completed - http://www.dotheton.com/forum/index.php?topic=14392.0
74 Honda XL 125 - Original - http://www.dotheton.com/forum/index.php?topic=25706.0

Offline SrgtBear

  • Posts: 842
  • The arsenic has oddly shaped feet...
Re: 79 Kawasaki KZ650: Cam & Head Teardown - First Examination
« Reply #7 on: Jul 01, 2013, 14:19:44 »
It's been awhile since I posted an update:

Got the engine out from the frame, started a tear down this weekend.  Finished with getting the head off.  Initial impressions not bad.  Valves had no leaks, previous hiss issues could of been from this oily messy head gasket or exchange from one cylinder to the other.  Still haven't identified any major issues.  Based on visual comments are welcome.

Just ordered new oils seals, tools to get the overhaul done and a manual cam tensioner.





« Last Edit: Jun 21, 2016, 16:47:11 by SrgtBear »
Ted

Kawasaki Kaiju (怪獣) - 79 KZ650 - 700cc Bore Cam Rocket - http://www.dotheton.com/forum/index.php?topic=39748.0
75 Yamaha XS500B Cafe - Completed - http://www.dotheton.com/forum/index.php?topic=14392.0
74 Honda XL 125 - Original - http://www.dotheton.com/forum/index.php?topic=25706.0

Offline Nebr_Rex

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Re: 79 Kawasaki KZ650: Cam & Head Teardown - First Examination
« Reply #8 on: Jul 02, 2013, 01:45:26 »
Measure your cylinder bore diameter.
I don't remember stock 650 pistons having that big of a valve relief.

Offline SrgtBear

  • Posts: 842
  • The arsenic has oddly shaped feet...
Re: 79 Kawasaki KZ650 - One chiped piston and a 64mm bore
« Reply #9 on: Apr 09, 2014, 23:38:00 »
    It's been awhile.  Got back into this project after a fun and exciting winter full of skiing.  With that said here is where I am at.

    Took the pistons off.  Accidentally ripped of the side of one piston in the process.  It's a learning process so I've accepted the fact that I goofed.  The worst part is that the bore is 64mm, 2 sizes over.  Which makes finding a 64mm exact replacement nearly impossible.  If anyone has one laying around, please let me know.

    Split the engine, everything looks good.  Time to get those remaining parts out and off to get them cleaned up.  Stay tuned.




[/img]
Ted

Kawasaki Kaiju (怪獣) - 79 KZ650 - 700cc Bore Cam Rocket - http://www.dotheton.com/forum/index.php?topic=39748.0
75 Yamaha XS500B Cafe - Completed - http://www.dotheton.com/forum/index.php?topic=14392.0
74 Honda XL 125 - Original - http://www.dotheton.com/forum/index.php?topic=25706.0