1981 gpz1100 project resto-mod

looks great. What size tire?

kaw-a-holic wrote: looks great. What size tire?

Thanks, the rear is 18x150x70, the rim is 4" wide, so it can take up to a 170 but that's too wide for the swing arm. The 150 clears by about 5mm per side at the standard rearward position. The brake arm also clears, by about 2mm. I might move or bend it slightly to get a little more clearance. Stock rear brake will not work, so I'm going to get a rear 87 gixxer brake.

The front is more challenging. The tire and wheel clear with the stock forks, however, the rotors just touch the forks. They are about 6mm too wide. I had the same problem on my 86 VFR when I converted it to CBR600 F2 wheels. So I have to mill down the rotor mounts on the wheels 6mm per side. Its a bitch to do, but it has to be done. Might have to ditch the old console too for a Koso. No great loss, that thing is big and ugly anyhow.

Update, I've added a set of GSXR1100 front forks and triple clamps to over come the width issue with the front wheel. I'm not sure I'll stick with these, I might ditch them and use a set of cbr600 F3 forks that I have and just use the triples off the GSXR. I also have to convert to a 530 chain, which ok, Z1 has a kit to do it. My 34mm flat slides are finally on their way, after three months waiting....

*Nice projects. Where did you get the 50 body parts?

mjg15 wrote: *Nice projects. Where did you get the 50 body parts?

Not sure what you mean. Most of the bits are from the bikes, just stripped off.

Oh, if you mean the 550 mostly ebay, and some from steels cycle salvage.

Yup, meant 550, sorry about the typo, I didn't catch it. Nice job on the respray.

mjg15 wrote: Yup, meant 550, sorry about the typo, I didn't catch it. Nice job on the respray.

Thanks, I was going to have it sprayed by a "pro" and they wanted $1200.00 holy crap! I'm pretty good with the color, was going to have the clear done at a shop, but they wanted $700.00 just for that. So, I decided to do the whole thing myself, built a booth, bought the equipment, read some books, practiced, and did it.

I'm making progress on the wheel conversion. Front wheel engineered, brake extension templates made, just need to mill them out.
I did have to ditch the stock console (its for sale cheap), the electronic sending unit at the wheel was way too big to the mill down and make fit. So I got a 87 GSXR mechanical speedo drive&cable, that I was able to mill down enough, and the cable matches perfectly to a 1984 Zn1100 LTD instrument cluster. The cluster also mounts right to the triple clamp along with the warning light brackets from the same 84 ZN1100. I had to mill and turn the spacers to fit, and mill the wheel brake mounting points down about 6 mm and re-tap. I used a ridged mounted dial meter to true the disk rotors. The 86 750 front wheel uses a 15mm axle the 87 1100 17 mm, either work fine with the stock GPZ axle. I did have to mill the GPZ nuts down a little. With the front wheel now 18" and wider, I dropped the fender down 3/4" with new mounting holes drilled. I modified the swing arm slightly to allow more clearance for the new fatter 150 rear tire. It actually gave me enough room to mount a 160 conformably, but I'm sticking with a 150 for now. The best thing about this wheel swap is the ability to run radials, they are so much better than the bias ply. I'm using a 87 GSXR rear brake and mounting hardware, the swing arm needs a bracket welded on the bottom for the brake torque arm. I bought a set of Zephyr 1100 rear shocks for it, that I am having Jamie Daughtery of DMS www.daughertymotorsports.com/ Rebuild and modify. When he is done with them they will out perform Ohlins, at a far better price point. Chain is now a 530, with a front sprocket from Z1 Ent. Front forks will get a set of Raceteck Gold Valve emulators and upgraded springs. Also added a fork brace and steering dampener.

FINALLY received my lovely Mikuni RS34-D21-K flat slide Carbs, test fitted them yesterday, perfect fit. They are beautiful. I'm still debating whether or not to fit some race cams to boost the power up a bit (or in my case recover power from altitude loss).

What I still need, desperately, is the in tank fuel level sending unit. This is the round base type.

I have parts for sale too:
All for a 1981 GPZ1100 B1 with 3600 miles on it.
rear brake
MAF unit
2 (two) EFI controllers computers
EFI air box
Speedometer/Console, like new
Tripmeter/Odometer with just 3600 miles on it. <<< what the bike has, original miles.
Right hand mirror
Front wheel with rotors
rear wheel with rotor & sprocket <<< with original factory tire!
Original chain <<< 3600 miles on it

I brought the tank in my avatar to a local auto body and asked them how much to shoot clear coat on it and I would do the prep, the final 1500-2000 wet sand and polish.... they said $200.00 I said F**K you... I did all my self with rattle cans.

missionkz wrote: I brought the tank in my avatar to a local auto body and asked them how much to shoot clear coat on it and I would do the prep, the final 1500-2000 wet sand and polish.... they said $200.00 I said F**K you... I did all my self with rattle cans.

Dont spill fuel on it.... Does look nice.

mjg15 wrote:

missionkz wrote: I brought the tank in my avatar to a local auto body and asked them how much to shoot clear coat on it and I would do the prep, the final 1500-2000 wet sand and polish.... they said $200.00 I said F**K you... I did all my self with rattle cans.

Dont spill fuel on it.... Does look nice.

Eastmans makes a two part fuel proof clear coat that works fantastic. Just google it.

Cool, sounds handy, I'll take a look