Suzuki with an English accent

Most tanks would need to be modded to fit your bike for sure. There is nothing wrong with putting knee dents in your tank if thats the look you are going for. Plenty of people have gone that route, myself included. There are plenty of video's on youtube showing techniques and whatnot.
 
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RT360build020.jpgTo get some ideas go to Airtech motorcycle fiberglass. Click on Vintage tanks. First decide what level of skill you have or are willing to pay for just so you don't get in over your head. I'm currently putting a 1966 GP350 Yam tank on a DT250 '73 for a vintage cafe style parts (bitsa) bike.
Cheers, 50gary
 
Andrew, being that you have an L model, I believe the tank mounts are different than the other models. The guys on the GSResources would have a better idea than me though......

If i had to guess, I would say look for a pre-83 tank from an inline 4 GS. They would stand the best chance of fitting your frame with minimal modification.
 
Just behind the neck on your frame it should have had 2 plastic covers. If you pull the covers there is a hole in the frame where you can place a rod and create a new front mount for a Pre-83 tank like Big Rich said. On my 750 I picked up a 'E' series tank from an '81 1100 and then just had to fab up a rear mount because it is a 5 gallon tank rather than the 2.5 'L' series tank. Just an option for ya so you wouldn't have to make some major modifications. Nice thing about the e series tanks they seem to flow a little better compared to some of the other models for a cafe.
 
What Dane said. I hadto fab a rear mount for my newer style E tank. My L brackets had it sitting way far back. It moved it up almost 3 inches and down about 1 1/2". Trial and error will get you what your looking for. if you post up pictures of the mounting points some of the more experianced guys like Rich ETC may be able to throw more ideas at you.

FYI,
GK
 
Haven't been able to do any work on the bike, but in the meantime I took an MSF course and had a freaking BLAST doing it. We rode around cones and stuff in a parking lot on little Suzuki 250s. I think when I get this bike going I want to buy a tiny bike like that and get a lot more custom on it. Maybe make something from the ground up.

So I found this pic (on the bottom. My bike is on top), and showed the guy helping me with this bike, because the frame/fender shape is similar to mine, and the seat doesn't look stupid. I kept looking at cafe racer seats I liked, but they all sat on totally flat frames, and so I couldn't visualize it working on my bike. But if you look at the line at the bottom of this Norton's seat, where it's raised up over the fender, I think my bike can pull this off. I guess the seat pictured is a Corbin, and costs almost $500, so I need to find a way to get that replicated for cheaper... Again, my friend says he has a plan for the seat, so I really need to just chill and trust him.
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Finished sorting the carbs. Whoever was in them before lost a few washers and beat up some of the heads on the screws, but we got it all worked out.
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Then we tried setting an older triumph seat on the bike. Probably could have made this work, and been good with it, but the pan ended up being pretty shot- it had holes rusted through it all over. I don't remember which year this seat was made...
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Then we tried setting a newer triumph seat up there, but I didn't like the look. Not terrible, but IMO too long.
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Then, because my friend had half a dozen brand new seat covers laying around, we decided to try chopping the foam on my stock seat, then seeing if we could rig a flatter cover on the pan... It didn't work.
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Fed up, I ended up asking around to find a pro. I was not disappointed. I showed the guy this picture
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and he wasted zero time getting started. He did the work right in front of me. "Want it higher here? steeper there? here, try this on..."
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Keep, in mind, the rear end of the seat pan is quite bulbous, and the locking mechanism to hold the seat in place isn't all that slim, protruding from the top of the rear of the pan. So we got the scoop as scoopy as we could. I'm happy with it. MUCH better than stock.
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Should be running within a week. Can't wait to try the seat on!
 
I drove a half hour to the garage to sit on my bike for 15 minutes tonight, and see how the seat fit... It was well worth it. The bike runs great, I should be able to ride it home tomorrow. I'm picking it up in the morning.
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Here's the official before and after shot. So it's not a HUGE change, no welding or chopping involved... New handlebars (1950 BSA bend), new custom seat foam and cover (modeled after a Corbin), new signals and brake light, chopped rear fender, dropped the forks about an inch and a half, and jetted the carbs.

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So I ate crap today.

The very first time I took my bike out, I headed down a long and quiet road, then after about a mile I tried to make a U turn and head back. At the far right of the road, a little off the side and into the gravel, moving about 4 miles per hour, 1st gear, clutch pulled in, I lost my balance turning left and put my left foot down. The gravel shifted under my foot and the bike started to fall. My instinct in that moment was to grab the neck of the frame and try to pull it back up, but my foot was sliding out from under me as I did that. My instinct was wrong, BTW, because when I pulled my left hand off the clutch to grab the frame, the back wheel began to spin, and as the bike was headed toward the ground, my right hand rolled the throttle back. The rear wheel lurched forward and out, away from me, as the bike fell. I landed flat on my side- head, shoulder, hip, asphalt. I hit the engine kill switch immediately, even before I tried to get up. I barely remember picking the bike up, and I'm sure adrenaline assisted. Gas leaked out of the cap when it fell. I started it up and it ran home just fine. But I did break off the right turn signal with my foot when I tried to jump off the bike. It made me scared to ride it again, for a few minutes. But I found a quieter, cleaner road and started from scratch. The bike is in my parent's garage, and I don't plan on relying on it for commuting any time soon. I'll stick to wide open roads on the weekends until I really kick ass.

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I feel old as hell today. I feel like I fell off my bike going 40 mph. No bruises or anything, but I'm finding myself moaning and grunting to get on and off the couch this evening... But I rode the bike for like 5 hours today, and 2 issues arose.

1: Charging issue. I understand this is common with this bike, and before I took it from the shop the guy said it seemed fine, based on the lights not dimming or something as the bike ran. But after 5 hours of riding, the battery was dead. I was about to buy a new battery, but called my mechanic guy and he said it's most likely the rectifier or (gee, I forget). I'm not too worried about this, my friend says it'll be a quick , easy fix. But what I am concerned about, is problem 2, which is an irregular idle.

When I come to an idle, 4 out of 5 times it's normal, smooth, hangs out around 1,000 rpm. But that 5th time it'll either get stuck at 2,000 rpm, or it will continue to drop past 1,000 until the bike dies. It doesn't make the bike unridable, but it is annoying. My friend says he has no idea why it could be doing that. We replaced the jets and all of the O rings, and cleaned every nook and cranny of the carb. Took like 12 hours (6 of them to jam the thing back into the bike). My friend got out a set of gauges that he hooked to the carb to measure the vacuum, and he said that the right two and the left two aren't reading the same. I didn't note either reading, but I can if that would help you to help me.

Any idea what could cause that?? I've already asked the guys at the Suzuki forum. Probably no harm in asking all over the place...
 
Re: Re: Suzuki with an English accent

50gary said:
I wondered if anyone else here built guitars?
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Scratch built 1984, book matched flame maple top semi hollow, self built tremolo. Cherry wood back and body. Paduk fret board and skunk stripe on back of neck. Not a good photo.
Your GS can be a very cool bike keep at it.
Cheers, 50gary
I have built guitars for a couple of years now....built an ES335 last winter.

Sent from my Nexus S 4G using Tapatalk 2
 
Andrew, glad for you to not break any bones or something more drastic. A lesson learned.
If your mechanic found the carbs not to pull the same vacuum did he synchronize the carburetors? That is the purpose of the gauges. The carburetors should all open and close at the exact time and at the same amount from idle to WOT. Usually you will synch. the carbs after everything else is spot on.
Cheers, 50gary
 
Ouch......that sucks man.

1) I'm sure you have seen the stator papers on the GSResources - follow them to a "T". It might be your R/R, stator, wiring, or the battery itself.

2) Check your throttle cable for stickiness, and air leaks around the intake boots too.
 
We took off the regulator this morning and found the wires melted together. Will be replacing it tonight and updating thread soon. Thanks, all. I'm going to double and triple check the air box for leaks.

-A
 
Andrew,
Also check your carb boots between the carbs and engine intake ports. These generaly have an o-ring rather than a gasket (not sure about you model). upon removing mine you would have been lucky to find the o ring it was so flattened out. Strangely on mine it created a very intermittent walking idle as you describe. Some times it would be fine, Other stops it would rev or stick at a higher limit.

Perhaps this has something to do with the worn out boots and or o-ring expanding and or contracting due to heat. Biggest issue would be around town or around the neighborhood riding since i didn't get it opened up and get great airflow across the engine. When riding 2 lane etc and coming to a stop it was not nearly as pronounced.

just a thought if you haven't replaced either.

Gary
 
Charging system fixed! Replaced the regulator, because the original had some fried and melted wires. Now it's pushing 6 amps or so. Nice and strong...

We checked the air box seals to the carbs, and they seemed good (sprayed an aerosol something or other onto the seals and didn't experience any change in idle- that's how you check that, right?)
 
Yeah thats one way to check. Make sure you take it out and run the bike hard. I had no issue until the bike was really warmed up then if i sprayed around they would race. I found the o-ring issue as well a small crack right at the metal flange side when i used this approach.

If that yields no results let us know what it was and how you found it. I could always use to learn more.

GK
 
Glad you and the bike are ok after laying it down! Let me know if you are still looking for a stock turn signal, I think I may still have one in a box on the shelf. ::)
Your 4 valve '80 GS doesn't have the o-ring style carb mounts gk45011 is refering to. Those were on the earlier 2 valve 750's and other sizes. Ours (I have the same bike) have the individual intake runners cast right into the head and then rubber insulators (boots) that mount the carbs. That is another place to check for a vavuum leak not just between the airbox to carbs but between the carbs and the cylinder head, dry cracked 30 year old insulators or a wrinkle / gap from not getting them installed right. Yea, it's a bitch to get that carb rack back on! Also check the cable as already mentioned. It's easy to get that in a bind.
As for your charging issues, sounds like you definately found a problem with the Rec / reg wires. Also make sure you keep the revs up. These bikes don't start charging until about 3,000 RPMs. Common for Noobs to "lug" the bike around at lower speeds in a higher gear than they should. and your alernator isn't putting out anything over battery voltage at those lower speeds.
You'll start to appreciate the sweet song of a Zook at the higher revs and be cruising around at 4 grand doing 30mph and really, that's good for them. But pay attention, the throttle is much more responsive as she is right at the begining of where her powerband is starting. But kinda like any other gal... when you're ready, grab a handfull, slap her in the ass, and hold on!
Anyhow, sorry for the rambleing on... here is the carb to head insulators I was talking about.
 

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AndrewDoesHair said:
Been tied up with other projects the past few days. This here hobby is how I raise money to fund my other hobbies. I bought my bike with funds I earned by making guitars...
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Tomorrow I'm scheduled to move forward on the bike. I eventually intend to make a guitar to match my final color scheme (I love love LOVE Triumph spring gold)... Although I may be a long way away from wanting to paint my bike. I don't have the patience for that right now- I just want to RIDE!


A fellow Suzuki/cafe enthusiast AND a guitar builder?! A man after my own heart! Looking forward to seeing pics of BOTH hobbies!
 
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