Page 1 of 3 123 LastLast
Results 1 to 10 of 30

Thread: Degree the cams?

  1. #1
    Join Date
    Jun 2008
    Location
    New Buffalo, Michigan 49117
    Posts
    5,717

    Default Degree the cams?

    To degree, or not to degree. That is the question.
    Is a lowly street bike and daily rider worthy of such effort?
    I understand that by degreeing the cams you're just moving the power band to another RPM range.
    Valuable adjustment for a race bike, but should I bother to do it with my 1100G?
    I was thinking it may be worth the learning experience, and probably interesting.
    "Only fe' collected the old way, has any value." from His Majesty O'Keefe (1954 film)
    1982 GS1100G- road bike, body, seat and suspension modded
    1990 GSX750F-(1127cc '92 GSXR engine) track bike, much re-engineered
    1987 Honda CBR600F Hurricane; hooligan bike, restored

  2. #2
    Join Date
    May 2007
    Location
    muskegon, mi
    Posts
    2,856

    Default

    your thinking is correct, I think.....did it on my 1100 b/c of a cam swap. Learning experience for sure. Not that hard once you grok it, but it takes time to grok to fullness
    1983 GS 1100 ESD

  3. #3
    Join Date
    Jun 2008
    Location
    New Buffalo, Michigan 49117
    Posts
    5,717

    Default

    Quote Originally Posted by greg78gs750 View Post
    your thinking is correct, I think.....did it on my 1100 b/c of a cam swap. Learning experience for sure. Not that hard once you grok it, but it takes time to grok to fullness
    I didn't know you did a cam swap, can't remember a post about it, but can't remember a lot of posts here.
    "Only fe' collected the old way, has any value." from His Majesty O'Keefe (1954 film)
    1982 GS1100G- road bike, body, seat and suspension modded
    1990 GSX750F-(1127cc '92 GSXR engine) track bike, much re-engineered
    1987 Honda CBR600F Hurricane; hooligan bike, restored

  4. #4
    Join Date
    May 2007
    Location
    muskegon, mi
    Posts
    2,856

    Default

    just stock 1150 cams, not anything too exciting
    1983 GS 1100 ESD

  5. #5
    posplayr's Avatar
    posplayr is offline Forum LongTimer GSResource Superstar
    Past Site Supporter
    Join Date
    Dec 2007
    Location
    Tucson Az
    Posts
    23,677

    Default

    Quote Originally Posted by greg78gs750 View Post
    just stock 1150 cams, not anything too exciting
    On the 16V bikes the Exhaust cam on the 750E and the 1100E is the same, so you can boost up the 750 intake side with the 80-82 1100E intake cams. On a bone stock 81 GS750EX I had a noticeable increase in pep and had to bump-up the main 1 step size.

    If i was going to degree a cam, I would see if there are any step up cam option that would not break the bank.
    Read about Charging Quick Test GS Charging Health GS Stator

    "The smallest giant of mankind, is he who stands on the shoulders of a larger giant who himself stands on the shoulders of yet a larger giant, and therefore sees the most light from GOD." Posplayr 2017 adapted from : Bernard of Chartres


  6. #6
    bwringer's Avatar
    bwringer is offline Forum LongTimer Bard Award Winner
    GSResource Superstar
    Super Site Supporter
    Join Date
    Oct 2003
    Location
    Indianapolis
    Posts
    16,777

    Default

    It does add a small potential failure point; there's some nonzero risk of the bolts backing out and letting the sprockets whack around, or the bolts getting loose and creating chaos.

    What that degree of risk is, I dunno, but I've seen it happen (bolts didn't get loose, fortunately). However, in that case we had no idea who had originally done the modification, so perhaps it was just human error. We buttoned things up with new grade 12 bolts, proper torque, and red Loctite, and had no further issues.

    I'm not sure if there are any cam options for an 1100G. You could start by using a stop, degree wheel, indicator, etc. to take some careful measurements of the stock cam setup.

    I also learned the hard way during that project that there are different types of degree wheels (some are marked for 360 degrees and some 180 degrees and back to zero), and trying to follow instructions to the letter without being aware of the difference is one sure path to insanity.
    1983 GS850G, Cosmos Blue.
    2005 KLR685, Aztec Pink - Turd II.3, the ReReReTurdening
    2015 Yamaha FJ-09, Magma Red Power Corrupts...
    Eat more venison.

    Please provide details. The GSR Hive Mind is nearly omniscient, but not yet clairvoyant.

    Celeriter equita, converteque saepe.

  7. #7
    Join Date
    Nov 2015
    Posts
    31

    Default

    Quote Originally Posted by Buffalo Bill View Post
    ...
    I understand that by degreeing the cams you're just moving the power band to another RPM range.
    ....
    Degreeing the cam is checking the cams are opening/closing when you think they are. You would degree stock cams if you were blue printing a motor.
    To change the "power band" you would move the "centers" or timing of the cams, by changing the clocking between the two cam and/or the crank.
    Off the top of my head a stock GS wants the cam centers at 105 degrees, lots of overlap.
    IIRC my GS is set at 110 degrees. Helps top end, kills gas mileage

  8. #8
    posplayr's Avatar
    posplayr is offline Forum LongTimer GSResource Superstar
    Past Site Supporter
    Join Date
    Dec 2007
    Location
    Tucson Az
    Posts
    23,677

    Default

    I got a lot of grief about this but it works very well and uses the small degree wheel.

    https://www.thegsresources.com/_forum/showthread.php?139950-High-Accuracy-Degree-Wheel&highlight=high+performance+degree+wheel
    Read about Charging Quick Test GS Charging Health GS Stator

    "The smallest giant of mankind, is he who stands on the shoulders of a larger giant who himself stands on the shoulders of yet a larger giant, and therefore sees the most light from GOD." Posplayr 2017 adapted from : Bernard of Chartres


  9. #9
    Join Date
    Jul 2005
    Location
    Finland
    Posts
    300

    Default

    Regarding question if it's worth of effort for stock(ish) street bike. Well, you never know... I would say that moving the cam timing from stock values to something else probably won't provide huge improvement. But there is one catch. At least my experience is that stock timing can be quite badly off from the spec from the factory. I have seen over 10 degree variations. So if you bike happens to be this kind worst case sample then you might get noticeable improvement just by degreeing the cams to the factory spec.

  10. #10
    Join Date
    Jun 2008
    Location
    New Buffalo, Michigan 49117
    Posts
    5,717

    Default

    Quote Originally Posted by posplayr View Post
    I got a lot of grief about this but it works very well and uses the small degree wheel.

    https://www.thegsresources.com/_forum/showthread.php?139950-High-Accuracy-Degree-Wheel&highlight=high+performance+degree+wheel
    Thanks a bunch, interesting read for useful info. Also an interesting debate.
    "Only fe' collected the old way, has any value." from His Majesty O'Keefe (1954 film)
    1982 GS1100G- road bike, body, seat and suspension modded
    1990 GSX750F-(1127cc '92 GSXR engine) track bike, much re-engineered
    1987 Honda CBR600F Hurricane; hooligan bike, restored

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •