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Does my 81 GS750l like high revs/ when to shift?

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    #16
    I get what you are saying about the bike not sounding too good at higher revs. Up to about 4,750 rpm my 1100 shafties sound as sweet as a nut (whatever that means!) and after that it sounds as if all hell is breaking lose and that the noise is one of complaint. I have never liked revving over 6,000 rpm around town (in the lower gears) for that reason - it just doesn't feel so good.

    Now you go and ride a 4 valve GS1150/GSX1100 and boy there is a huge difference. These bikes are turbine smooth and just feel better and better the faster you ride and the higher you rev. Climb back on the older 750 and 1100 bikes and the issue is even more apparent (I have both models).

    Here's my view; the older 2 valve 750s and 1100s were never supposed to be high performance racing machines. Although in my experience the 750 was always smoother than the 1100, they were touring type equipment. I remember riding my GS750 to the South of France with my girl friend (round trip of 2,000 miles) circa 1980 and it was great tacking along around 75 mph all day. But start racing it and it started to sound stressed. I'm pretty sure it isn't stressed - just sounds that way.

    On previous threads you will see riders who swear that they take their machines up to the red line in every gear all the time. I would call that racing.

    Try this: make sure you have a smooth tickover (correctly adjusted carbs) and they are synchronized (this can make a big difference). Take you bike onto the highway and find the vibration spot. This is usually around 4,500 to 4,750 rpm where it fells horrible and there is a significant buzz in the bars. Get to feel how smooth it is below that and then also above it (you might start to break your own speed limit - take care). They usually smooth out considerably above 5,000. Great for cruising around that level. But back in town you are constantly hitting that vibration spot and it's off-putting.

    I'm used to it now and after thousands of miles cruising these bikes, I've just learned that it's part of their character.

    This is the perfect cruising for me: open highway at 5,000. Don't do this at home:

    Richard
    sigpic
    GS1150 EF bought Jun 2015
    GS1150 ES bought Mar 2014: ES Makeover Thread AND blog: Go to the Blog
    GS1100 G (2) bought Aug 2013: Road Runner Project Thread AND blog: Go to the Blog
    GS1100 G (1) Dad bought new 1985 (in rebuild) see: Dad's GS1100 G Rebuild AND blog: Go to the Blog
    Previously owned: Suzuki GS750 EF (Canada), Suzuki GS750 (UK)(Avatar circa 1977), Yamaha XT500, Suzuki T500, Honda XL125, Garelli 50
    Join the United Kingdom (UK) Suzuki GS Facebook Group here

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      #17
      Open highway at 5,000 on a 750 will get you rear ended.
      http://img.photobucket.com/albums/v5...tatesMap-1.jpg

      Life is too short to ride an L.

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        #18
        Hey, my '81 750/863 liked to go to 12K as a shift point. But then I had polished and shot peened rods, ported head with big valves and 1100 cams. Had 13:1 when the base gasket squished out so went for a custom, thick copper gasket. GSXR1100 carbs too. Would keep up with my friends 1260 Kawi.
        So, no worries.
        G
        sigpic1983 1100 Katana - soon to be turbo Busa powered.
        2007 GSXR1K-Sold-But not forgotten.
        Have 2X ZG14 engine's for '81 GS750E project.
        '82 GS750E frame is TITLED awaiting GSXR1127/12B engine and '81 1100E slowly being built.:eek:

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          #19
          My owner's manual also lists absurdly low shift points. They're envisioning a slooow trip down the block.
          1982 GS1100E V&H "SS" exhaust, APE pods, 1150 oil cooler, 140 speedo, 99.3 rear wheel HP, black engine, '83 red

          2016 XL883L sigpic Two-tone blue and white. Almost 42 hp! Status: destroyed, now owned by the insurance company. The hole in my memory starts an hour before the accident and ends 24 hours after.

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            #20
            Have a laugh:

            image.jpg

            No need to shift down from top gear until you slow to 19 mph!
            Last edited by Rob S.; 12-21-2015, 08:59 PM.
            1982 GS1100E V&H "SS" exhaust, APE pods, 1150 oil cooler, 140 speedo, 99.3 rear wheel HP, black engine, '83 red

            2016 XL883L sigpic Two-tone blue and white. Almost 42 hp! Status: destroyed, now owned by the insurance company. The hole in my memory starts an hour before the accident and ends 24 hours after.

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              #21
              After a couple rides I checked a manual and found the shift points a little odd. On my old 79 850 there isn't much space on the dial between 0-10. I know on one of my rides around the block I was doing 25 in first and just considering shifting to 2nd. I don't think I had the tachometer over 3500 if even that high.

              Sean

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                #22
                These engines love to be revved. 5000-8000 is normal, even higher at times. Cruising? 5500 or so...

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