79 GS1000 Restore

[Guest]

Hello everyone,
It’s been a few years since I was last on this site. Youwere all of great help when I resurrected a neglected 1979 GS1000N from a barn backin 2006. After removing the Vetter fairing and trailer hitch, restoring a rustytank, cleaning carbs, replacing seals in the forks, calipers and mastercylinder, upgrading the R/R, re-building the rattly clutch hub, removing thehead to extract broken exhaust bolts, and repainting all of the body pieces, Ifinally had the chance to put a few miles on it before it had to go back into storagefor the past few years. This winter I’m going to start checking more items offthe GS project list...I finally have a space to work on it and I’ve set aside amodest budget. Disassembly has already begun. My plan is to keep the bike mostlyoriginal-looking and true to the time period. I’d like to increase performancewithout greatly reducing reliability/longevity of the engine and drive. Here’sthe list of what I’m planning for sure:

-Repairing the wiring harness (the old one is a mess from wiringin the Vetter fairing and a trailer hitch, and there’s definitely corrosion ina lot of the connectors).
-Blast and paint the frame
-Recover the seat
-Wiseco 1085 piston kit
-Dyna S ignition, coils, wires
-V&H 4 into 1
-K&N pods
-530 chain conversion
-Braided brake lines
-Oil cooler
-Wes Cooley fairing matching the current paint

There are a few things that are undecided… cams, port andpolish, different carbs, and what to do with the bottom end. *Disclaimer* I amby no means a master mechanic, but I have a general understanding of how mostthings work. I am looking for suggestions as to where I can get the most bang for my buck performance wise. I don’twant to spend $500 on something that gives barely noticeable gains…you knowthat whole idea of “diminishing marginal returns” from economicsJ
-Cams: I’ve read that a cam upgrade is recommended with thebig bore kit and I’m considering some from DynoMan (Web Cams, 110 grind). Foranyone who has run them with the Wiseco 1085 kit, how streetable are they? Idon’t want to totally kill the bottom end of the power band.
-Port and Polish: I know that this can make a hugedifference in performance, but is it really necessary? If I get the cams anddon’t port and polish, are the cams a waste of money? Currently I am leaningtowards not spending money on the port and polish.
-Carbs: If I were to port and polish and do the cams (orjust do the cams), do I need to upgrade the stock VM26, or will they do thejob? I’d really prefer not to spend more money on carbs. If a carb upgrade isabsolutely needed, I’ve read that 29mm smooth bores can be fitted, but anythingelse would require one of the large port heads. I saw some 28mm smoothbores,would those work? Ultimately, if I won’t see a gain from the port and polish and/orcams without upgrading carbs too, I may just stop at the bigbore kit, 4 into1,and pod filters for now.
-Bottom End: The bike has 20,000 original miles on it…as faras the bottom end, I was planning on pulling the crank, having it indexed andwelded. That should be all that is needed, right? Is that something that anydecent machine shop can handle?

Thanks for any comments/suggestions…and sorry for the shortnovel.

Spencer

[GSX1000E]

Depending on where you live, this guy can handle most all of the work that you have listed and is highly recommended by several on this forum.

http://www.citysearch.com/profile/33187262/west_alexandria_oh/pearson_racing.html

[Sbuchert]

Depending on where you live, this guy can handle most all of the work that you have listed and is highly recommended by several on this forum.

http://www.citysearch.com/profile/33...on_racing.html

Thanks GSX1000E. Unfortunately I'm in MN... Does anyone know of a good machine shop closer to MN that knows GS bikes and can handle what I'd like to do?

[Sbuchert]

Here's a link to a pic of my bike before I started disassembling it this week.

http://s1382.photobucket.com/user/buche104/media/010_zps85d4ae33.jpg.html

[Big T]

Modest budget?

You're talking $2-4 grand here

Porting needs to be left to the experts, otherwise, you lose power rather than gain

[Wraith]

Tuning is not cheep at the best of times, so if it was me if you just want a bit more power with out spending lots of cash I'd do this:
1. You can get of Eb*Y a standerd comp 1100cc kit for £86 (the lot pistons,rings,pins and gasket) I'm using one of these in one of my GS1000 and it works very well and dose give a bit more power, not as much as a hi comp kit but 1/4 the price.
2. If you have a slide carb head get some Kwak Z1000J carb rubbers (oval the mounting holes) put them on you head then you can put some GSXR1100 GHJ 34mm CV carbs on they will help or if you can get them Kat 1000 slide carbs.
3. keep the standerd cams or put some GS750 cams in not a huge power incress but the 750 cams will let the 1000 rev quicker.
4. Slotted cam sprockets so you can get the timing bang on if I remember right 3 dig addv makes the GS1000 run much better.
5. Dyna coils leads and Dyna S.
6. A good free flowing Zrost.

Thats a cheep way of doing it
If you go any bigger than a 1085cc hi comp kit best putting bigger exh vavles in as well to help it breeth, you dont need to that's just for best power.
Enjoy the rebuild.

[Sbuchert]

Well, I've finally got around to updating this post. I've completely disassembled my bike. The frame and a bunch of other parts are off to get painted. Instead of modifying my motor, I bought an already built motor (Wiseco1100 kit, ported head with oversize valves, Yoshimura cams, and welded crank) from another GSR member, Stetracer. The motor was pulled out of a 1980 GS1000S, and was running then. He freshened up the head before sending the motor my way. The head is stamped with JSR 11/26/84, and there is a sticker on the back of the motor that is hard to make out--I can read JSRacing and there's a phone number with the area code 305 (Miami). A quick google search of JSRacing turned up nothing...anyone familiar with that shop? It would be interesting to know more about the company that built the motor back in the day. Since the sticker has a "rising sun" theme, I'm assuming it was a shop that specialized in Japanese motorcycles...
Here are a few pics.

Disassembly started in the garage...

Then I rolled it into the basement so I could work where it's above freezing...notice the broom handle handle bars...that's the only way I could fit it through the door, haha.


Engine out.



Parts ready to get blasted and painted.


The head from the new motor



And the sticker of the shop that apparently built the GS1000S motor I'll be using.

[bigsixman]

Nice looking project bike to start with, good luck and please post pictures and the progress of your build.