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Re: '83 GPz1100 A1...
Posted: Fri Dec 19, 2025 10:31 pm
by Skub
Le_Fromage_Grande wrote: Fri Dec 19, 2025 9:19 pm
Skub wrote: Fri Dec 19, 2025 8:58 pm
Some folk convert them back to carbs.
Mine has Mikuni RS34s, I think I'd rather have fuel injection as it hardly gets ridden and modern fuel gums up the pilot jets, I drain the carbs every time after it's run but it still has problems.
I think riding any bike sorta half regularly will help to avoid lots of running issues.
Re: '83 GPz1100 A1...
Posted: Sat Dec 20, 2025 12:34 am
by ZRX61
The only thing I can see that needs taking care of is the edge of the wheels will need a strip/polish to match the ZRX/ZX11's wheels. It's a non-negotiable must do.
... and a fresh group pic just a few days after I took this one:
- IMG_20251211_125921499.jpg (3.27 MiB) Viewed 862 times
Re: '83 GPz1100 A1...
Posted: Sat Dec 20, 2025 12:48 am
by Felix
That does look very standard and rather nice
Re: '83 GPz1100 A1...
Posted: Sat Dec 20, 2025 12:57 am
by Felix
Supermofo wrote: Fri Dec 19, 2025 8:40 am
That California weather sure does help bikes age!
To right. The A1 will be around 40 years old.
Re: '83 GPz1100 A1...
Posted: Sat Dec 20, 2025 4:52 am
by ZRX61
Felix wrote: Sat Dec 20, 2025 12:57 am
Supermofo wrote: Fri Dec 19, 2025 8:40 am
That California weather sure does help bikes age!
To right. The A1 will be around 40 years old.
Almost 43 years...
Re: '83 GPz1100 A1...
Posted: Sat Dec 20, 2025 10:04 am
by Taipan
Skub wrote: Fri Dec 19, 2025 5:05 pm
Ya need to start a thread in the 'owners/projects' section,otherwise this one will drop off the page pretty fast.
Or ask one of the mods to move this thread there.
Re: '83 GPz1100 A1...
Posted: Sat Dec 20, 2025 1:56 pm
by ZRX61
Le_Fromage_Grande wrote: Fri Dec 19, 2025 9:19 pm
Mine has Mikuni RS34s, I think I'd rather have fuel injection as it hardly gets ridden and modern fuel gums up the pilot jets, I drain the carbs every time after it's run but it still has problems.
Run it on 100LL Avgas.
Re: '83 GPz1100 A1...
Posted: Tue Dec 23, 2025 12:20 am
by ZRX61
KungFooBob wrote: Fri Dec 19, 2025 9:23 pm
Would a modern EFI setup work better, make more BHP?
Stick a set of GSXR1000 throttle bodies on it and a Megasquirt ECU.
Apparently Toyota injectors are a possibility.
Re: '83 GPz1100 A1...
Posted: Tue Dec 23, 2025 1:13 am
by Felix
Sod trying to get more power out the thing. My 750 was forever wanting to throw me off at speed. The chassis probably wanted braced more and front end changed as the stanchions were only 37mm. The 11 looks no wider
Re: '83 GPz1100 A1...
Posted: Tue Dec 23, 2025 8:22 pm
by ZRX61
Felix wrote: Tue Dec 23, 2025 1:13 am
Sod trying to get more power out the thing. My 750 was forever wanting to throw me off at speed. The chassis probably wanted braced more and front end changed as the stanchions were only 37mm. The 11 looks no wider
It's more a case of the DFI system shitting the bed & OEM gubbins not being available. I think the forks may be 38mm, I know they increased by 1mm around that time.
Re: '83 GPz1100 A1...
Posted: Tue Dec 23, 2025 8:25 pm
by ZRX61
WooT!!
Just called the insurance company for a quote...
$7500 agreed value, full coverage, fire, theft, collision, earthquake, uninsured illegal immigrant etc etc....
$90/year
Re: '83 GPz1100 A1...
Posted: Tue Dec 23, 2025 9:56 pm
by Le_Fromage_Grande
ZRX61 wrote: Tue Dec 23, 2025 8:22 pm
Felix wrote: Tue Dec 23, 2025 1:13 am
Sod trying to get more power out the thing. My 750 was forever wanting to throw me off at speed. The chassis probably wanted braced more and front end changed as the stanchions were only 37mm. The 11 looks no wider
It's more a case of the DFI system shitting the bed & OEM gubbins not being available. I think the forks may be 38mm, I know they increased by 1mm around that time.
I think the forks are 37mm, they went down a mm from the gpZ1100B (Z1000J), if I could be arsed I'd have a look in the workshop manual I've got for the J engined bikes
Re: '83 GPz1100 A1...
Posted: Tue Dec 23, 2025 11:23 pm
by Felix
This was my intentions of my 750. Front and back from a ZXR400. Front end was just a case of pressing the stem out and into the ZXR. Back end was a straight swap.
- gpz-zxr (1).jpg (66.07 KiB) Viewed 686 times
Never did get round to it so just ratted the bastard. It was 100% standard when i got it from Strappy.
- Colour (1).jpg (608.29 KiB) Viewed 686 times
Re: '83 GPz1100 A1...
Posted: Wed Dec 24, 2025 1:38 pm
by ZRX61
Just got a msg from the seller, he'll be here around 8am. WooT!!
It's absolutely pissing down.
Re: '83 GPz1100 A1...
Posted: Wed Dec 24, 2025 3:36 pm
by ZRX61
94 miles from his house to mine. 5 North is closed for a truck wreck & not expected to open until 11am... then there's another section before the wreck that is flooded & down to one lane.
So his nav doodad is sending him on a 121 mile route/detour.
We're under a severe weather warning & also flash flooding going on.
Re: '83 GPz1100 A1...
Posted: Wed Dec 24, 2025 3:47 pm
by Skub
ZRX61 wrote: Wed Dec 24, 2025 3:36 pm
94 miles from his house to mine. 5 North is closed for a truck wreck & not expected to open until 11am... then there's another section before the wreck that is flooded & down to one lane.
So his nav doodad is sending him on a 121 mile route/detour.
We're under a severe weather warning & also flash flooding going on.
There's a man who'll drive through hell or high water to get rid of a bike.
Re: '83 GPz1100 A1...
Posted: Wed Dec 24, 2025 4:13 pm
by ZRX61
Skub wrote: Wed Dec 24, 2025 3:47 pm
There's a man who'll drive through hell or high water to get rid of a bike.
LOL! He's from Manchester, probably show up in shorts & a T-shirt with a knotted hankie on his head.
The wreck on the 5 was a collision between two FedEx big rigs...
Re: '83 GPz1100 A1...
Posted: Wed Dec 24, 2025 4:18 pm
by KungFooBob
Is he riding it or trailering it over to you?
Re: '83 GPz1100 A1...
Posted: Wed Dec 24, 2025 4:29 pm
by Count Steer
KungFooBob wrote: Wed Dec 24, 2025 4:18 pm
Is he riding it or trailering it over to you?
He's from Manchester so probably riding there and walking back.
Re: '83 GPz1100 A1...
Posted: Wed Dec 24, 2025 5:58 pm
by ZRX61