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Thread: 750 cams in a 1000?

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    Default 750 cams in a 1000?

    I read this question on the net, and, while people there verified that installing 8 V 750 cams in a 1000 provided a big power boost.

    As Gustov piled a bunch of motor parts in my van during his last rally, I have a nearly complete 750 head with cams taking up space.

    So, I need to know if I should keep these cams. I already have slotted cam sprockets
    Last edited by Big T; 04-04-2021 at 01:19 AM.
    1978 GS 1000 (since new)
    1979 GS 1000 (The Fridge, superbike replica project)
    1978 GS 1000 (parts)
    1981 GS 850 (anyone want a project?)
    1981 GPZ 550 (backroad screamer)
    1970 450 Mk IIID (THUMP!)
    2007 DRz 400S
    1999 ATK 490ES
    1994 DR 350SES

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    Nessism's Avatar
    Nessism is online now Forum LongTimer GSResource Superstar
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    The 750 and 1000 cams share the same lift, but the 750 has 8 degrees more duration. I doubt you would notice the difference.

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    Quote Originally Posted by Nessism View Post
    The 750 and 1000 cams share the same lift, but the 750 has 8 degrees more duration. I doubt you would notice the difference.
    Ed how do you (and certain others) go around knowing all this stuff? We'll keep you around here forever.
    "Men will never be free until Mark learns to do The Twist."

    -Denis D'shaker

    79 GS750N

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    Nessism's Avatar
    Nessism is online now Forum LongTimer GSResource Superstar
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    Quote Originally Posted by Allie View Post
    Ed how do you (and certain others) go around knowing all this stuff? We'll keep you around here forever.
    Hi Allie,

    First off, what the he11 is that avatar? It's creeping me out!

    Regarding the facts about cam lift and duration, it's in the factory service manuals. I can't remember all this stuff but I can look it up.

    The only thing I "remember" or know, is that 8 degrees of extra duration won't add much power. Geeks like me watch lots of youtube engine build videos where you can learn this sort of $hit.

    Now time for muffins. Or in my case, a pizza. Did you see my pizza thread in the campfire?

  5. #5
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    Thanks, Ed

    I was more than a bit dubious about the gains in HP
    1978 GS 1000 (since new)
    1979 GS 1000 (The Fridge, superbike replica project)
    1978 GS 1000 (parts)
    1981 GS 850 (anyone want a project?)
    1981 GPZ 550 (backroad screamer)
    1970 450 Mk IIID (THUMP!)
    2007 DRz 400S
    1999 ATK 490ES
    1994 DR 350SES

  6. #6
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    Am I right in thinking Suzuki put the 1000 cams in the 850? It's been a long time for me to try and remember this stuff.
    Expecting the Spanish Inquisition
    1981 GS850G: the Ratzuki
    1981 GS1100E

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    Quote Originally Posted by zuluwiz View Post
    Am I right in thinking Suzuki put the 1000 cams in the 850? It's been a long time for me to try and remember this stuff.
    From the parts x-ref, yes. The GS850 and 1000 shared exhaust cams 79 to 83 and intake cams for 79, but the listing may be incomplete.
    ---- Dave
    79 GS850N - Might be a trike soon.
    80 GS850T Single HIF38 S.U. SH775, Tow bar, Pantera II. Gnarly workhorse & daily driver.
    79 XS650SE - Pragmatic Ratter - goes better than a manky old twin should.
    92 XJ900F - Fairly Stock, for now.

    Only a dog knows why a motorcyclist sticks his head out of a car window

  8. #8
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    Quote Originally Posted by Nessism View Post
    Hi Allie,

    First off, what the he11 is that avatar? It's creeping me out!

    Regarding the facts about cam lift and duration, it's in the factory service manuals. I can't remember all this stuff but I can look it up.

    The only thing I "remember" or know, is that 8 degrees of extra duration won't add much power. Geeks like me watch lots of youtube engine build videos where you can learn this sort of $hit.

    Now time for muffins. Or in my case, a pizza. Did you see my pizza thread in the campfire?

    Hahah last year people were sporting those cheery cartoon avatars on Facebook so I made one appropriate for the times by pasting Commodore Decker's mug on one (Just before he gets incinerated in the planet killer's maw). I guess it's old news now.

    I did not see your pizza thread. I'll look for that to continue off the thread topic. I like pizza too!
    "Men will never be free until Mark learns to do The Twist."

    -Denis D'shaker

    79 GS750N

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    rphillips is offline Forum Sage Past Site Supporter
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    Nothing to me, but a guy in parts wanted is looking for some cams that will work in a GS1100GL to get reground. Rekon you got anything that may help him out? 750, 850 1000 are the same, maybe 1100 also.
    1983 GS1100E, 1983 CB1100F, 1991 GSX1100G, 1996 Kaw. ZL600 Eliminator, 1999 Bandit 1200S, 2005 Bandit 1200S, 2000 Kaw. ZRX 1100

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    salty_monk's Avatar
    salty_monk is offline Forum LongTimer GSResource Superstar
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    I guess in a restricted race series where you are trying to legally ring every fraction of a HP it might have been a mod to use....

    1980 GS1000G - Sold
    1978 GS1000E - Finished!
    1980 GS550E - Fixed & given to a friend
    1983 GS750ES Special - Sold
    2009 KLR 650 - Sold - gone to TX!
    1982 GS1100G - Rebuilt and finished. - Sold

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