1983 GS750E Progress:
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1983 GS750E Progress:

This is a discussion on 1983 GS750E Progress: within the Project Builds forums, part of the Caferacer.net Forums category; Hey, friends. I was working really hard trying to finish a few add-ons to this bike before last weekend, but as luck has it... I ...

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Thread: 1983 GS750E Progress:

  1. #1
    Senior Member MK3Brent's Avatar
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    1983 GS750E Progress:

    Hey, friends.

    I was working really hard trying to finish a few add-ons to this bike before last weekend, but as luck has it... I had clutch issues at the last minute.
    The clutch basket pressure plate boss has a stripped threaded hole, so I'm replacing the entire assembly with new Suzuki parts. Going back to Suzuki pressure plate springs, and ditching the Barnett stuff.

    I really respect the opinions and suggestions I have received here on my other bike thread, so I figured I'd get some more input for this one.

    What I'll do here is write out what I've done already, and leave it open for suggestion for further upgrades.

    Modifications:

    Ignition:
    Dyna-S ignition (Deleted ignitor, stock coils, wires, NGK plugs .032" gap)

    Suspension:
    Suspension Front - Front forks are from an 82' E, removed stock pre-load spring and spaced the damper 2.5", these forks have schrader valves for air pre-load, currently have 0psi until I get it running soon. Sag in the front is approximately 30mm.
    Suspension Rear - Rear schocks are Ohlins SU-143, sprung for my weight.
    Rear swing arm - GS1100E, I drilled and reamed the frame for the larger pivot bolt. All new bearings/seals.
    Stock anti-dive units were cleaned and rebuilt, a new front end is in the plans. Maybe in a couple years.
    Standard clip-ons, can't remember where I got them.
    Stock gearing, fresh 630 chain. I'll probably convert when these sprockets are worn out.

    Frame:
    Few misc. features deleted from the frame such as battery mount tabs, and other misc. tabs.
    Rear tail section is cross braced with 1" x .125" angle steel. (Serves as a battery mount as well.)
    Rear-sets from a 2004 GSX-R. The brackets I fabricated out of 1" C-Channel steel .125" THK, and a milled slot.
    I turned down some carriage bolts from 316SS such that the head of the bolt slides nicely in the channel, and allows adjustment for proper riding posture.

    Brakes:
    Rotors, calipers are stock.
    Pads are NOS.
    Brake lines are teflon lined SS braided.
    All brake components are rebuilt and cleaned.

    Carbs:
    53mm Mikuni CV carbs
    Dyno-Jet Stg. 3 with adjustable needle jets
    Mikuni 70mm velocity stacks, aluminum.
    All cleaned and rebuilt.

    Exhaust:
    Vance Hines, 4-1. (rest of exhaust not pictured.)

    Electronics:
    Innovate XD-16 wideband O2 sensor and gauge/data logger.

    Battery:
    Odyssey PC680 sealed.

    I think that's about it... Running a mis-matched tire right now. Contemplating a nice new set for the season, but haven't done anything yet.

    Here are a couple pics. I'm going to clean it up a little more here soon. I have a CR-750 fairing coming for it with in the next couple weeks. Air Tech is currently making it for me, so I'll see how much I like it when it's here.

    Anyway, have a look.
    If something I have done is down right stupid... please educate me.
    As always, I'm here to learn.









    One of the sliders before painting:
    Attached Images Attached Images  

  2. #2
    Senior Member Joep7's Avatar
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    Nice set of upgrades. Only weak spot I really notice is the front forks are just small, but you addressed that. Maybe for the time being a fork brace wi the fender and a steering dampener will help. Possibly look at cartridge emulators.

    Are the stacks filtered at all? I wonder if a uni sock filter may do the trick.

    mudguard for rear fender??

  3. #3
    Senior Member Dean's Avatar
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    I like the C-channel rear set mount idea and adjustability

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  5. #4
    Senior Member steveo's Avatar
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    It looks as though you have nearly everything sorted. I'm sure the CR fairing will look superb.

  6. #5
    Senior Member MK3Brent's Avatar
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    What do you guys think of an R6 front end from a 1999 model?
    I'm thinking it would give me damper adjustment, better brakes, better everything... Maybe one of the more simple swaps.

    Would be my first attempt at that, so I'd have a lot of questions.

    Something like this to get started.
    Yamaha YZFR6 R6 600 Straight Front End Forks Clamps Wheel Excellent 1999 to 2002 | eBay

  7. #6
    Senior Member Joep7's Avatar
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    Quote Originally Posted by MK3Brent View Post
    What do you guys think of an R6 front end from a 1999 model?
    I'm thinking it would give me damper adjustment, better brakes, better everything... Maybe one of the more simple swaps.

    Would be my first attempt at that, so I'd have a lot of questions.

    Something like this to get started.
    Yamaha YZFR6 R6 600 Straight Front End Forks Clamps Wheel Excellent 1999 to 2002 | eBay

    If you have access to a welder and a lathe it's easy to make anything fit. Not sure how different the stems are in length. You also need to consider making wheels work or replacing them with modern ones that fit the front end. Then you have swingarm swap issues.

    Allballs may have a kit for you but I can almost guarantee you will need to make stem length changes.

    Take rake and trail into consideration too as most modern front ends fit shorter on older frames.

  8. #7
    Senior Member hillsy's Avatar
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    If you use GSXR triples / front end up to 95 they bolt straight in - same stem bearings.

  9. #8
    Senior Member MK3Brent's Avatar
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    Quote Originally Posted by hillsy View Post
    If you use GSXR triples / front end up to 95 they bolt straight in - same stem bearings.
    No shit? Awesome.. Let me look into that one.

    Thanks!

  10. #9
    Member hardline_42's Avatar
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    Suzuki used the same stem bearings across many models for decades. You can pretty much take your pick. I think some early GSXR forks were cartridge style and RSU, if you want to keep the look.
    1981 GS450E
    2001 SV650S
    Previous:
    1976 CB550/1974 CB360/1975 TX500/1974 XS400/1985 ZL900/1990 FZR600

  11. #10
    Senior Member hillsy's Avatar
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    Funnily enough the stem bearings on my Intruder 1500 are still the same size as the old GS ones (Upper: 25 x 47 x 15, Lower: 30 x 55 x 17).

    So, if you were game for a laugh you could use one of those.....that would give you a 150/80-16 front tyre.....all the brat douches would be green with envy....

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