The (project currently without a name) build.

BoneDaddy

Been Around the Block
I've been asked a few times about a build thread so here goes. Bear with me, this could take a (long) while.

I bought my '82 650GL in the spring and really haven't done a whole lot since except research, plan, haggle for and collect parts, hypothesize solutions and agonize over the sheer weight of my project.

You see, I got the bike in trade for an '89 Bronco with a blown rear-end. Going into the deal, I new I was walking into a project and was just happy to be set up with a running, riding bike that was in decent condition. I rode it 120 miles home without incident. As the weeks went by, and I tinkered with things like new spark plugs, fresh battery, adjusting the idle down to a reasonable rpm, yanking off the crash bars, and various other innocuous tasks, I began to realize that I wanted it to be my first 'nice' bike. Don't get me wrong, I've owned bikes that I absolutely loved and felt genuine remorse when they were gone, even rebuilding an RD from the wheels up, but I wanted this GS to be a reflection of me.

That's probably how most wrench-monkeys take that first bite that is just a little bit too big to chew.

I started by searching for the parts I wanted and collecting pictures of bikes that I admired, taking careful mental notes of the design cues that really stuck with me. Going in, I wasn't sure if I wanted a cafe racer, a stretched and raked bobber, a sinister-brat, or something in between. The stance and height of the bike, along with the Japanese interpretation of cruiser styling, just screamed 'chopper'. It simply made sense and would be the easiest so I did what I normally do: the exact opposite.

I decided to go with a cafe racer look with some handling and tuning to match and began to look for parts. I decided I didn't like the normal bubble seat and set out to make my own. I spent an entire day fabricating a new seat pan from sheet metal, primed it, set it on the bike, and promptly decided that I didn't like it. I later tracked down the tail section from an old KZ750 that was exactly what I was looking for and happened to be the perfect width and already had the perfect tail light. I also fabricated a set of clip-on bars from scratch, fitted them to the bike, and also decided I didn't like them (the same went for the drag bars). I finally found a set of clubmans that I really liked and ordered them. Not a fan of 4-2 exhaust systems, I sought a nice 4-1 setup but quickly realized that the only thing remotely in my budget was a MAC system. Not only did I find out that MAC makes a sub-par product (no offense to MAC owners, just what I've heard) but I also find all that chrome and the huge silencer to be an eye-sore. After lots of hunting, I finally found a 4-1 from a GS550 with a Yoshimura pipe already on it for the agreeable sum of $150.

My original plan was to collect all the parts I wanted before tearing into the bike but today was such a beautiful day and I was still motivated after work, I just had to rip things apart. Today, the seat came off and the reciprocating saw made quick work of the seat support. Off came the chrome rear fender and on went the clubmans and the mock-up of the seat pan/ tail section. As I put everything back together, I noticed just how much work I have ahead of me. There's paint chipped off of everything painted, an un-corroded bolt nowhere in sight, rust spots in every nook and cranny, and dirt on everything except the new clubmans (became dirty as I pawed them with my grubby hands). I still need to figure out a safe and secure way of fitting the seat, acquire a tank with better styling, strip, clean and/or paint everything, track down a tach, remove all the idiot lights and wiring from the demolished dash, shorten the various cables and wired from the controls, find some shocks that will raise the stance a few inches, remove the rear pegs and center stand, adapt and fit the new exhaust, prime and paint, and all the hundreds of gotchas that are bound to pop up. Still, I'm happy to have finally started.

So here's a horrible cell pic of what the bike looked like when I brought it home:
0604011342.jpg

Here's the small progress made today. Please excuse the tools and debris strewn about, I was racing against the coming sunset:
GS1.jpg

GS2.jpg


Now that you've seen the pics, I'm sure you have a feel for how much work I have ahead of me. Once everything is all together, I'm going to tackle tuning. I'm pretty good at bringing bikes back to life but I don't know crap about precision tuning. The small engine guy at work is going to give me a hand with rebuilding the carbs or possibly switching to a slide setup. Once we get it jetted for what we feel is optimal for the 4-1 exhaust, the bike is going to HK powersports for a few dyno sessions and tuning by guys who know a lot more than we do about squeezing power. No pod filters or v-stacks are planned but I might fabricate a nice steel airbox if I can find someone with some fluid dynamics knowledge to lay on the idea. Part of me is hoping that the stock intake can't be improved!

So there it is, my monster. Sorry for the novel.
 
Exhaust came today, gaskets have been ordered, still need to have the adapter sleeves turned to fit the 550 pipes up to my 650 ports.
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New tank should ship early next week and once it's been cleaned, kreemed and rejuvenated, I can put it on the bike and start really working on the seat.
Here's the new tank, almost matches the color of the tail!:
tank3leftside.jpg


Next it's on to mirrors, controls, idiot light removal, and suspension.
 
I did a little bit of de-wiring today, removing the tach lights, dash lights and fuel gauge. I put butt connectors on everything in case I ever want to reconnect anything. For now, just the speedometer is fine and it looks a lot cleaner up front. The stock dash is huge! I was going to snap a pic of the results but it started to rain. I also got some paint stripper and flux-core wire to start work on my new fuel tank which should arrive on the 26th. I'll post pics of any progress I make on that. Still waiting on my adapters so I can get the exhaust on, hoping I can get it done before it gets too cold.
 
Moving along nicely! Are you doing this build with out a shed or garage?
It's got a really nice stance from the outset, Factory custom/cruisers always seem to look good cafe'd :)
 
Yep, I'm building it in my dirt driveway! I've been looking for garage space for a while but have basically struck out. Nothing is worse than being at the mercy of the elements while trying to work on your bike.
 
Looking like a great beginning. Is that an EZ model seat from a 750 bike? Also, I'm digging, what looks like, a 750 tank that you've chosen to go with. Does the 650 shafty seat-frame dip down like on my 850, or is it a flat-top frame like the chain GS bikes? If you have any questions, feel free to ask, we have 5 GS bikes sitting here at the house and a pretty good collection of understanding these old pigs.
 
The original seat is the stock GL 2-up and the tail section I'm using for the new seat is from a 1980 KZ750. My seat frame is actually straight back from the the tank so I dodged a bullet there. I would have figured our bikes to have very similar frames in that respect but I guess not!
The tank is indeed from a 750, E model to be precise.
 
While I'm waiting on parts, I picked these up for $20:
41WWmnBDZL_SL500_AA300_.jpg

They'll look waaay better than the moth antennas I've got right now.

Looking at smaller turn signals too, any recommendations?
 
Can't you get an old shed from freecycle or whatever freebie network you have there and put it in the space? Looks like other people have from your pics.
Even just a 6x4 would get you out of the weather?
 
I've already got a small shed that holds my lawn mower, chainsaw, and whatever else I don't have room for in the house. I'd get a bigger one but my landlord is a real piece of shit...
 
I got my tank this afternoon and started a little bit of work on it. Knowing I had to do a little bit of rust repair on it, I bought some paint stripper to take it down to the bare metal to make it easier to work with and also give me a fresh start for new paint. I'll caution anyone who chooses to use a chemical paint stripper to explore other options first. It's a long, messy, and dangerous process and you'll likely end up with a splitting headache. Unfortunately for me, I don't have a sandblasting cabinet or any sort of power-sander on hand so I didn't have a whole lot of options and I have a bit of experience using this method. If you go the route I did, here's a few tips:

USE CHEMICAL RESISTANT GLOVES! Most chemical paint strippers will give you some pretty serious burns without you even realizing. I used nitrile gloves this time and they were not enough. Within 20 minutes, both hands felt like they were on fire from the fumes penetrating the nitrile. I ended up using dishwashing gloves.

DO THIS OUTSIDE OR WITH A VENT HOOD! I finished the whole process in about two hours, moving as quickly as I could, and still ended up with a righteous headache. I can't image what would have happened if I tried it in the shed.

WEAR SAFETY GLASSES! Seriously.

Get all your tools and supplies ready before hand. The less times you have to take your gloves of from start to finish, the less of a chance of getting this crap on your skin. I like to cut up all my rags and stack them so they are easy to grab one at a time and have a trashbag open in a cardboard box to catch spent rags and steel wool.

Scrape before you scrub. Don't even bother with the steel wool until you are down to the base coat and/or primer. There's a whole lot of clear coat and layers to scrape off. Some people only recommend wood or plastic scrapers but I use a putty knife. It'll take it right down, often to the metal, pretty easily and it won't gouge the steel if you're careful. Use course steel wool, it'll make the whole thing a lot easier.

Timing is key. Don't spread the chemical over an area larger than you can scrape in 5-10 mins. Once the finish bubbles up, scrape it off. If you allow it to dry, you'll just have to use more chemical on it. The can says to allow 10 mins. for the chemical to work but I find it often takes just 5 or so.

Preparing to strip:
0926011646.jpg


All done and getting dark outside:
0926011847a.jpg
 
I almost forgot to post the next step! I've got a decent amount of rust in the tank and a couple of holes at the end closest the seat that need to get taken care of. First, I plan to remove the scale and basically make a tine hole into a big hole :eek: . This will allow me to cut a patch and weld it in place of the most badly rotted area and then sand it smooth. When it's done, you'd never even know there was a hole (all that work and the area isn't even visible unless the tank is off the bike). Once I've got a solid container to work with, I'm going to degrease the inside, shake loose all the crap with assorted hardware, BBs, and chain, treat with muriatic acid, and then ask all you guys what you're favorite sealer is. Here's a couple pics the previous owner sent me of the inside of the tank and the worst rust spot. The spot has since broken through and there's a 1 cm hole in it's place.
 

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I did a bit of a mock-up so I can start planning the exhaust swap. I removed the old exhaust and put the new one in without new gaskets or the spacers I need to properly align the header with the ports just to get an idea of how it fit and any brackets I might need to fabricate. It went together quickly and without a hitch, fits perfectly and looks amazing compared to my old 4-1 setup. The best part is, I'll only have to drill one hole in the existing mounting bracket and it will bolt right up!


Since everything was lining up so nicely, the header naturally sitting in the center of the ports, I went ahead and tightened it down a bit and started her up (couldn't resist). It's got a serious growl now and sounds awesome, even without the header properly tightened and leaking a little. I recorded a bit of revving but didn't go too crazy as I started to get a climbing idle and a bit of backfiring. It's just a voice memo so it does the bike absolutely no justice but here ya go:
http://dl.toofiles.com/9x7nra/audios/voice95msg95tmp.wav
 

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I know everyone has been checking this thread daily, perhaps hourly, since October of '11 so I figured I'd do a little update. :D

I've been stupid-busy with work and sorting out my 4-wheeled vehicle troubles but I finally got the old GS into my shop and did some messing around. I hacked up the old seat and used the front half as a base for my new seat pan. I've got it mocked-up to where I want it and need to do a bit of tweaking before I affix everything and do the finishing touches but I think I like the way it's coming out.
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The only potential problem is that I got my hands on the coveted GS450 tank and the transition will be totally different than the current setup. I may end up fabricating a pan from scratch anyway. Here's Boobed_out's pic of the tank he sold me (thanks again):
FB020EA0-DEA9-4094-A0A4-F0BEA29F2AD8-659-0000006FAFEA032C.jpg
 
I did a quick mockup with the new tank, looks like it's going to work out better than I'd hoped.
 

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Well, the seat idea is scrapped for now. I tore the vinyl cover and I really didn't want to spend any money on it since it's cobbled together from parts I had laying around. While the transition looked pretty decent, I decided to buy a ready-made and go from there. I found an ABS seat on fleabay for reasonably cheap that looks like it will fit over my frame so I hope I won't have to invest too much more effort in the seat.
The sidecover that covers the air filter is broken and was held on with duct tape so I decided to address that tonight. I didn't want to do pods and deal with the nightmare of tuning CV carbs so I'm opting to keep MOST of the airbox. The way the GS is setup, the sidecover holds the air filter in place inside a large airbox which is connected via a tube/tunnel to a smaller airbox/resonator thing that connects to the carbs. I don't like the way it looks, and I'm not buying a new sidecover so something had to be done. I decided to cut away most of the large airbox, leaving only the tunnel that leads to the resonator(?) box. I'm going to attach some sort of cone filter to the tunnel and then cover the opening in the frame with an aluminum plate to keep the wind off of it.
I just realized this is all very pretty difficult to understand without pictures... I'll see what I can do tomorrow.
 
Thanks, Gary!
I got it running yesterday, huge step forward. It didn't like to idle without the choke and it dies out at 1/4 throttle so I've got to do a real carb re-build this time. It's a good opportunity to jet up a size for the 4-1 anyway though I'm a little worried that my intake setup will casue even more jetting issues. My plan is to keep the stock plenum but 86 the old filter box and replace it with a single large cone filter which will be protected from the wind by sheet metal side covers. I may just do a thorough cleaning of the carbs and then wait to do the jets until everything is back together and running.
My exhaust is now permanently hung with spacers installed and the pinholes freshly TIG'ed. The pipe is a pretty pitted so I cleaned it as much as I could, coated it with rust treatment, sanded, and then hi-temped with Rustoleum. Hopefully it will last at least a couple of years. If I ever get to do an 850 swap, I really only need the exhaust as a reference for building a new one.
My tank is all stripped and ready for body-filler and paint. The seat is waiting for mounting which is being held up by my not wanting to bite the bullet on a battery that will fit under the seat hump. Funny how the list grows as you go, huh?


(Sorry for the terrible pics)
 

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