Re: 72' Suzuki GT380 (She Lives!!!)

Re: 72' Suzuki GT380 first time build.

Nice, do you have any pics of your GT380? I'd love to see it. Great tip about the Yamaha swing arm. I had also heard that the GT550 swing arm is a bit longer aswell and might fit but not sure if thats accurate. Anyhow, glad you like it and thanks for the info!

Joe
 
Re: 72' Suzuki GT380 first time build.

I've got a few really bad shots, and nothing online.... Just to describe everything I did; obviously I had the Radian swingarm. Other than that, I turned the forks around backwards in the trees so the disc caliper was on the left behind the forks. I had a 17" rim laced up to the stock front hub.They were also pulled up an inch in the clamps.The front rotor was drilled, and I used a CBR1000 Hurricane master cylinder with braided steel lines. (Two fingers could put you over the bars.) Clubman bars, electronic ignition. The Boyer Brandsden unit was actually supposed to be for the Kawasaki KH250, but they sent instructions to modify it to fit the Suzuki triples. It fired all three coils at once, so reasoning that a two stroke fires every revolution instead of every other like a four-stroke, I surmised a tach set up for a four-stroke six-cylinder would work. I used a 2-inch Sunpro electronic tach and made my own cluster with a digital bicycle speedometer, the tach, the original gear-position indicator, and some mini LED idiot lights for Neutral, High beam, and turn signal functions. It was a flat sheet of polished stainless bent up about 15 degrees from level and bolted to the original gauge mounts on the upper tree.
I had Wirges chambers, black, and Emgo pod filters on GT550 carbs. The original jetting for the 550 was just right. The shocks were the reservoir-type Redwing hammerheads, three inches longer than stock. With the longer swingarm the mounts moved back some, so they needed to be a little longer than with the stock swingarm. I made rear-sets out of the factory passenger pegs. All I needed to do on the shift side was flip the original lever over and use a reverse pattern. (One up, 5 down.) It was the perfect length. The brake side gave me fits- I had it working, but not well. Given more time, I'd have just gone to a rear disc from a GS750. As it was, I cut a three-sixteenth inch section from a broken shock linkage from my VF1000R which had bronze bushings in it, and sandwiched it between the right passenger peg and it's mount. Then I made up a brake pedal out of steel and bolted them together, and moved the cable end to the hole left in the linkage slice.
Front and rear fenders were bobbed, I used a Lucas style taillight, and a solo seat from a chopper hardtail that was supposed to be sprung, but I just used the pivot at the front to lift up for oil tank access. If i can get access to a scanner, I will post what pics i have..... Thanks! I know I'm a little long-winded.
 
Re: 72' Suzuki GT380 first time build.

Just catching this thread, really nice work! Love the knee dents in the tank. One of my buddies has two GT380s I spent a fair bit of time on one this summer. they are an absolute blast to ride and everyone around here looks around like "where the hell is that snow mobile!!" (Portland, Maine)

anyways, the other 380 is a bit beat but has a 3-1 expansion exhaust that he might let go if you are interested. let me know and I'll work on him.
 
Re: 72' Suzuki GT380 first time build.

Damn two-smoker, killer description! Sounds like you had a bad ass super custom 380. I like the rear set setup. I would definately love to see the pics. Thanks for the ideas and tips.

Diesel, by the way good luck on BOTM, your bike is super slick. I would love to get my greasy hands on a set of 3-1 pipes for my bike. Soften up ur buddy alittle and see what he'd take for them. This is a budget build... ;)
 
Re: 72' Suzuki GT380 first time build.

Newtronics also do an electronic ignition for that bike IIRC. Or you could go all high tech and digital and fit a custom, fully programmable Ignitech system from eastern Europe for about $300 landed. Mine just arrived and I have been playing with different timing curve options on the bench before I take it anywhere near a dyno (mine is a 750 but they will sell you something fora 380).

3 into 1 systems sound great and I personally like them, and they typically save a ton of weight and improve te low to mid range but tend to lose a little at the top end.
 
Re: 72' Suzuki GT380 first time build.

teazer said:
Newtronics also do an electronic ignition for that bike IIRC. Or you could go all high tech and digital and fit a custom, fully programmable Ignitech system from eastern Europe for about $300 landed. Mine just arrived and I have been playing with different timing curve options on the bench before I take it anywhere near a dyno (mine is a 750 but they will sell you something fora 380).

3 into 1 systems sound great and I personally like them, and they typically save a ton of weight and improve te low to mid range but tend to lose a little at the top end.

I need to check into that for the R5!!
 
Re: 72' Suzuki GT380 first time build.

Street R5 or track? For race use only, try a PVL or JP Mestre in France or HPI in Belgium.

For the street I think Powerdynamo in Germany offer a CDI based system with alternator.

And Chinoy in India probably has something for that bike as well.
 
Re: 72' Suzuki GT380 first time build.

teazer said:
Street R5 or track? For race use only, try a PVL or JP Mestre in France or HPI in Belgium.

For the street I think Powerdynamo in Germany offer a CDI based system with alternator.

And Chinoy in India probably has something for that bike as well.

Thanks!
 
Re: 72' Suzuki GT380 first time build.

you going to use the guages man? them shits is dope!!!!.....
 
Re: 72' Suzuki GT380 first time build.

Very interested to see this come together... 380's one of my favorites!

Louie
 
Re: 72' Suzuki GT380 first time build.

doodoo said:
you going to use the guages man? them shits is dope!!!!.....

Are you refering to my stock gauges? If so, I may refurb them, change the faces to something cool and mount them individually. Or, if i can get a good price on some tiny gauges i might jump on that. I was also thinking maybe going digital.

Thanks for the interest guys, it gives me inspiration. I hacked 6'' off the back and cut and fitted a rear bar from a 4wheeler, the 7/8'' pipe slid perfectly into the back of my frame, I just need to get the welder back to finish it up. Theres still work to do on the tank before I'm happy with that. Next will probably fabbing and fiber glassing a custom seat. Anybody ever dealt with this site: http://www.partsnmore.com any feed back? They have a killer price on a full motor gasket set for $25, im thinking of ordering.

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Re: 72' Suzuki GT380 first time build.

No progress on my bike build due to a side project for my kids christmas gift, this is the result of about 4 weekends of work. check it out!

$75 on craigslist:
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stripped and ground off all the surface rust:

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made new seats, my boy picked out the black metal flake vinyl

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newer motor and new clutch

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new metal floor

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Pretty much done, just have to get some new tires, mount seatbelts, fabricate a chain guard, run throttle cable and adjust the rear brake caliper. Now I can get back on the bike!
 
Re: 72' Suzuki GT380 first time build.

were in Orlando Fl, so no snow here. but def. fun tho.
 
Re: 72' Suzuki GT380 first time build.

Ah, then you have a sand rail buggy. I lived in Orlando (Sanford, Deltona, Altamonte Springs, Longwood) over a 14 yr period from 85 to 99. After comming to Fla from Michigan by way of Wyoming never did like the heat, traffic and well you know.....
 
Re: 72' Suzuki GT380 first time build.

diesel450 said:
You may actually be the best dad ever.

Thanks for the kind words man, unfortunately we've suffered from an unexpected loss of a close family member last week and things have been pretty down on the home front. My wife and kids were impacted hard by this and its difficult to stay strong. Thanks again diesel, you have made my day alittle brighter.
 
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