Good bang for the buck upgrades...

High quality shocks
PTFE brake lines
High quality tires

Download or purchase the factory Kawasaki manual for your bike, and do EVERYTHING.  Some worthwhile tasks, that most people don't do, include greasing the steering head bearings (replace them if your bike has loose ball, get tapered roller), and grease the swingarm bearings.  Some people like electronic ignition upgrade, although points are tried and true.

Check my signature and read through the "new owner things to know" thread.  

Good luck

300,000 Views..
Wow !
 

Hi,
Currently figuring out how to attach Suzuki GS750 VM26's to a Zephyr 750 head.

Have the Z900/1000 rubber carb manifold's, elongated holes, bolts straight on.

Suzuki throttle bracket looks similar to Z900 and overlaps the rear cam tunnel bolt.

Bought a Z650 (KZ650) throttle bracket, it fits around the rear cam tunnel bolt.

Sure this has been done before and found a thread about it, but the actual question is about which cables/throttle tube to use, cannot find a clear example. At the moment I have 80's GPZ750 unitrac cables and throttle tube.
,
My bike is in the avatar , its a bit of a bitsa, 1979 Z650 frame, JMC chrome swingarm, later gpx600 forks, re worked micron fork brace, GPZ750 wheels.

Engine currently in bits, early 80's KZ750 cases (actually fits my frame, GPZ unitrac motor that came with bike had be bogged in) , GPZ750 barrels, 90's Zephyr 750 head.
My 80's GPZ750 unitrac engine needed a lot of cylinder head work, but luckily I found a Zephyr head that has been reconditioned, stripped it anyway and its all good for less than the price of a new set of valves and it has the Z900 look, will have to file the square fin profile to something more rounded , think it will look more at home in the Z650.

Question 2, I have read something about cam circles being different in some engines, so what do I check to determine if my GPZ unitrac cams will work correctly in my Zephyr head, it has same cam cover style as the Z900's.

Have added a few pictures below.


 

KZ400 and KZ440 are a direct swap, KZ440 being longer.
Kz550 is wider, but not by much. I narrowed one down for my KZ400.
This also upgraded the KZ400 swing arm bushings to KZ550 double roller bearings.
KZ650/750 are wider yet.

I like the drum brake. The front takes a few revolutions to grab when it rains or just gets wet. The drum always works. When I switched to mags I looked for a rear drum brake. My Lester's had it but now I have tubeless in the rear with the KZ750G rims. PITA to change tires until I got a bead braker and now I don't have to deal with rim locks. All around a much better setup. 
Steve

OK! Marty in Buffalo is getting old!  "CRS/Biden Brain"  . I had this swing arm sitting for a year! From a parts lot. All this time? I thought it was a Z1 drum brake swing arm!!
Never measured the rear axle opening. it's 17mm.
I just painted it with single stage urethane gloss black, was going to list on ebay with re-plated hardware.
It's for sale now!  Double needle bearings with full length sleeve 16mm pivot. No axle.
(Don't laugh Clay)       I'll send you the Z1 zinc hardware!

Marty in Buffalo

Hello folks 
hope you are all having a good weekend.
Question for any of you builders 
Starting a complete makeover on my old gpz
Love air cooled  4's
this has cosworth pistons falcon crank and h beam rods. Ape cams and rs flat slides.
Going to remove all suspension and wheels 
Swap to gsxr750 shocks front wheel gsxr1000 swingarm and gsxr750 rear wheel.
Question comes from my goal to use a k&n Superbike black bar.
Top clamp I machined smooth and mounted 7/8 bar mounts .
Do any of you see any issue with a bar on this heavy weight 
Thank you

Hi I am new to this forum and from the UK but not stranger to working on and modify bikes. Just taken on a 1982 Kawasaki GPz750 r1 twin shock . This has been modified with a Suzuki GSX front and rear end coupled to a period brace alloy swing arm.One of the many jobs that need sorting is the carburettors. The bank that came with the bike are wrong and bodged/damaged to fit 36mm choke Keihin CV,s.  They should be 34,s. I am struggling to find a suitable bank. The spacing centre to centre on the inlet port on the barrels are. between 1 & 2 is 76mm 2 & 3 is 95mm 3 & 4 is 75mm with the distance centre to centre between 1 & 4 is 245mm . Can any one help in advice to source the correct carb’s.All the banks I have looked at on eBay don’t seem to match the spacing I need I thought I saw something on this forum but can’t find it again.