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Re: '83 GPz750-A1 malarkey.

Posted: Tue Jun 23, 2026 11:55 pm
by ZRX61
Visited the GPz, mate wasn't there but the bike was outside.. :think: so I pulled a sneaky ;) removed the three brake calipers & the m/c from the bars :hmmm: then left before he got back. :shhh:

Re: '83 GPz750-A1 malarkey.

Posted: Wed Jun 24, 2026 2:36 am
by ZRX61
Fresh pile of crap to overhaul/IRAN.
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That front m/c might be toast, but will assess after it comes apart.

Re: '83 GPz750-A1 malarkey.

Posted: Wed Jun 24, 2026 6:20 am
by ZRX61
Arsebiscuits. The difference is in the lower fork legs....


But! I did find EBC 270mm front rotors for $170 each. Haven't bitten that bullet yet

Need to have a major garage tidy up/sort out tomorrow & then finish assembling the carb rack. Found an errant float needle laying on the garage floor this evening. :wtf: It had better be from the spare rack (which was laying on the floor with the bowls & floats removed a few days ago). I'll check the spare rack tomorrow. FFS

Re: '83 GPz750-A1 malarkey.

Posted: Wed Jun 24, 2026 8:15 am
by Rockburner
ZRX61 wrote: Wed Jun 24, 2026 6:20 am Arsebiscuits. The difference is in the lower fork legs....


But! I did find EBC 270mm front rotors for $170 each. Haven't bitten that bullet yet

Need to have a major garage tidy up/sort out tomorrow & then finish assembling the carb rack. Found an errant float needle laying on the garage floor this evening. :wtf: It had better be from the spare rack (which was laying on the floor with the bowls & floats removed a few days ago). I'll check the spare rack tomorrow. FFS
Ice cream tubs FTW.

Re: '83 GPz750-A1 malarkey.

Posted: Wed Jun 24, 2026 5:54 pm
by ZRX61
Initial soak in Evaporust didn't seem to be doing the job, so decided to pop the sender unit apart... :shock: :wtf:
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ARRGGHH!!
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It's now in the small ultrasonic with water, SG-HD & some Evaporust

Re: '83 GPz750-A1 malarkey.

Posted: Wed Jun 24, 2026 6:17 pm
by mangocrazy
There'll be some serious weight reduction on that sender unit compared to OE.

Re: '83 GPz750-A1 malarkey.

Posted: Wed Jun 24, 2026 7:55 pm
by ZRX61
mangocrazy wrote: Wed Jun 24, 2026 6:17 pm There'll be some serious weight reduction on that sender unit compared to OE.
It might even work :)

Re: '83 GPz750-A1 malarkey.

Posted: Wed Jun 24, 2026 8:01 pm
by ZRX61
WooT!! Carb rack assembled... Tres spiffique
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Still need to soda blast the throttle cable guide doodad (so it will come off again), fit the air screws & install the choke rod & associated gubbins.

Re: '83 GPz750-A1 malarkey.

Posted: Thu Jun 25, 2026 5:35 pm
by ZRX61
Sender unit is sorted.
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Re: '83 GPz750-A1 malarkey.

Posted: Thu Jun 25, 2026 6:44 pm
by ZRX61
Finished up the carb assembly. There are two very small springs & matching 1/8in ball bearings that hold the choke rod in position. What a fucking faff they were... The hole they fit into is inside the tube the choke rod goes through and then there's faff of the doodads that pull on choke plunger doodads that have a spring, cup & a Ping!FuckIt!
and then throw in the fact that I have 3 different pairs of glasses depending on how close something I want to look at is...
I was starting to question my life choices...
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Re: '83 GPz750-A1 malarkey.

Posted: Thu Jun 25, 2026 6:53 pm
by Rockburner
Time for Varifocals?

Re: '83 GPz750-A1 malarkey.

Posted: Thu Jun 25, 2026 11:45 pm
by ZRX61
Done/dusted...
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Re: '83 GPz750-A1 malarkey.

Posted: Thu Jun 25, 2026 11:47 pm
by ZRX61
Rockburner wrote: Thu Jun 25, 2026 6:53 pm Time for Varifocals?
Tried that, caused more issues.

Re: '83 GPz750-A1 malarkey.

Posted: Fri Jun 26, 2026 5:42 pm
by Ian
Had them for years, theyre overrated.
I have separate glasses for close up or just take my specs off.

Re: '83 GPz750-A1 malarkey.

Posted: Sat Jun 27, 2026 1:00 am
by ZRX61
Decided to take some 1200wet/dry & the polisher/buffer to the gas tank to see how it looked... Total waste of time as it has terrible orange peel, scratches, crap quality paint & needs a total strip/repaint anyway.

But I would ride it like this...
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Re: '83 GPz750-A1 malarkey.

Posted: Sat Jun 27, 2026 1:02 am
by ZRX61
and then my new $38 rear brake rotor showed up :)
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Re: '83 GPz750-A1 malarkey.

Posted: Sat Jun 27, 2026 7:01 pm
by ZRX61
Did some digging on the Niche website & it appears they have front rotors for the GPz750, but their listing is buggered up. They list the 750 A1-A3 having the same rotors as the E1-E2 (the turbo), but the A has 270mm (10.6in) rotors & the E has 280mm (11in), same as the 1100 A1-A3

But when you punch in the 750 A OEM part # it shows 270mm rotors... & shows them also fitting the 750 E. Gonna have to call them on Monday to make sure they actually have the 750 A rotors...

Re: '83 GPz750-A1 malarkey.

Posted: Sat Jun 27, 2026 10:41 pm
by ZRX61
Faffed with the front fender...

How it looked:
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Washed:
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Sanded with #1200
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Half-assed buffing
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Re: '83 GPz750-A1 malarkey.

Posted: Tue Jun 30, 2026 12:41 am
by ZRX61
Kickstand doodad arrived.... $80.04 FFS
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Re: '83 GPz750-A1 malarkey.

Posted: Tue Jun 30, 2026 5:12 pm
by ZRX61
Ordered a pair of front brake rotors from Niche: $70 :)

Removed stuck dome nut from exhaust stud (that was finger tight in the head) & cleaned up the threads so that can go back on the engine.