1. Some members were not receiving emails sent from XJbikes.com. For example: "Forgot your password?" function to reset your password would not send email to some members. I believe this has been resolved now. Please use "Contact Us" form (see page footer link) if you still have email issues. SnoSheriff

    Hello Guest. You have limited privileges and you can't "SEARCH" the forums. Please "Log In" or "Sign Up" for additional functionality. Click HERE to proceed.

Ouija board

Discussion in 'XJ Technical Chat' started by wizard, Jun 5, 2008.

  1. wizard

    wizard Active Member

    Messages:
    5,282
    Likes Received:
    26
    Trophy Points:
    38
    Location:
    DEVON ENGLAND
    After bench sync', got the carbs on the bike and connected.
    after cranking the motor for a while to get the fluids around the system, she burst into life and idled at 4000 revs, panic, race to the idle screw and bring her down to a sensible 1100 revs. Phew.
    Note to the sheikh of tweak. rickcomatic. at the end of your post on bench sync' could you add: " now turn the idle screw untill the butterflies are closed" thanks.
    Today i will try out the ouija board test bed, for vacuum sync' using the sheikh's old school method.
     
  2. RickCoMatic

    RickCoMatic Well-Known Member

    Messages:
    13,842
    Likes Received:
    67
    Trophy Points:
    48
    Location:
    Massachusetts, Billerica
    That is quite "The Board"!!!
    Looks like you forgot the "Walnut Stain and Poly" finish I would have done!

    From the looks of things, you're ready for Sync and Fine-Tuning!

    I'd really like to see the board in action.
    Could you have someone make a little video for us?
    Just a minute or two.

    You deserve to have it features on YouTube for doing-it-up so elaborately.

    My Bench Sync is with strips of Business Card or 3X5 Card.
    I can't imagine it making 4K rpm's!

    Hurry the Sync along and don't be shy about the Video!

    (A thought from the eye of the admirer:)
    Mount some cork along the Outside Diameter of the Gauge.
    Use Push Pins to mark individual readings from the four manifolds.
     
  3. wizard

    wizard Active Member

    Messages:
    5,282
    Likes Received:
    26
    Trophy Points:
    38
    Location:
    DEVON ENGLAND
    i used strips of business card, perhaps it was a bit thick.
    good idea the push pins, color coded of course.
     
  4. RickCoMatic

    RickCoMatic Well-Known Member

    Messages:
    13,842
    Likes Received:
    67
    Trophy Points:
    48
    Location:
    Massachusetts, Billerica
    Where did you put the Restricter?
    The little device that is going to keep the Indicator on the Vacuum Gauge from fluctuating out of control?

    Restrictor:
    (Hose union piece with Carb Cleaning Red Tube epoxied through its center)
    As shown in this photograph:
    [​IMG]
     
  5. wizard

    wizard Active Member

    Messages:
    5,282
    Likes Received:
    26
    Trophy Points:
    38
    Location:
    DEVON ENGLAND
    Rick if you look real close you will se the vac' pipe is thicker where it meets the 'manifold' AKA the bit holder from my battery screwdriver, in there is a smaller diameter plastic pipe with the WD 40 tube inside that, i used clear silicone to secure it, other than that it's all pure Rick.
    as for taking a video, i figure i would take a set of stills in real time as i sync' the carbs, it will be easier to post in the thread.
     
  6. RickCoMatic

    RickCoMatic Well-Known Member

    Messages:
    13,842
    Likes Received:
    67
    Trophy Points:
    48
    Location:
    Massachusetts, Billerica
    I just want to see it work!
    That's the epitome of Old School ... right there!

    I'm sure it's going to do the job.
    But, it looks like more fun ... doing it your way ... than just taking the Gauge out of the drawer and hooking-it-up.

    It looks to me like a lot of thought went into it.
    I can't wait to hear how well the Carbs get synced using your Wee-gee Board!
     
  7. wizard

    wizard Active Member

    Messages:
    5,282
    Likes Received:
    26
    Trophy Points:
    38
    Location:
    DEVON ENGLAND
    all synced up, pictures are:
    1. RPM while adjusting.
    2. gauge during adjustmets.
    3. final result.
    running pretty good now, just some poppety popping from the exhaust, any ideas, before i move on?
     
  8. stevetibb2000

    stevetibb2000 Member

    Messages:
    234
    Likes Received:
    0
    Trophy Points:
    16
    Location:
    bakersfield
    how did you get that motor so shinnnnnnnnnnney
     
  9. gunnabuild1

    gunnabuild1 Member

    Messages:
    607
    Likes Received:
    2
    Trophy Points:
    18
    Location:
    Australia
    Hey wizard I looked at your gallery,did you get the bike in bits? Just asking because I think you would have some awesome before and after pics.
    Looking good mate waiting with baited breath for your finished product!
    Glenn
     
  10. martinfan30

    martinfan30 Member

    Messages:
    114
    Likes Received:
    0
    Trophy Points:
    16
    Location:
    Carson City, Nevada
    The poppity pop is a lean condition. I was trying to figure it out for awhile on my ride.

    Just ordered richer jets.
     
  11. RickCoMatic

    RickCoMatic Well-Known Member

    Messages:
    13,842
    Likes Received:
    67
    Trophy Points:
    48
    Location:
    Massachusetts, Billerica
    Exactly.
    Poppity, pop-pop, pop ... is something still a little too lean.

    Use the Idle Adjustment Rod or the Cable Slack Adjustment and run the engine at 28-Hundred to 3-Thousand rpm's and listen to the exhaust note.

    If you can hear it poppin' ... Tweak each Carb, in turn, a few degrees Richer, until it disappears.
    Tweak the Carb out and listen to the Exhaust note.
    When the popping sound is gone leave that set-up asa your Base for further fine-tuning.

    Once the Idle and Off-Idle are established ... you can further fine-tune for performance.
    Set-up a fan and run up to 5,000 and hold it for 20-seconds.
    Kill switch to shut-down while the bike is revving.

    Read the Plugs and make individual adjustment to each hole according to how the Plugs look after the Plug Chop.

    You mey be close enough to just do some riding and examine the Plugs after you get home.
    Riding the bike will tell you how the Mixtures are set by the performance of the Bike as you stop, idle and pull-away from being stopped.

    You concentrate on getting a seamless transition from Idle to Open Throttles.
    When you open the Throttles, if you get a powerful acceleration without hesitation you have found the Window for further fine-tuning.

    Power and crisp acceleration with firm engine braking comes when the Pilot Mixture is onn the Lean side.
    Jest a few degrees of Richness will change the Performance.

    Velvety smooth acceleration and Cruiser-style "Coasting" are Dialed-in when the Mixture is slightly Rich.

    In either case, you will know by examining the Plugs which Holes need a little more or less by examining the Plugs and making your fine-tuning adjustment.

    Looks like you are in the fun section of getting tuned-up.
    You are right where you need to be.
    Just tweak it as needed and enjoy the best you can get from your bike!
     
  12. wizard

    wizard Active Member

    Messages:
    5,282
    Likes Received:
    26
    Trophy Points:
    38
    Location:
    DEVON ENGLAND
    Hi Steve, clean is the secret, i had the motor soda blasted, then just pollished the highlights.
     
  13. wizard

    wizard Active Member

    Messages:
    5,282
    Likes Received:
    26
    Trophy Points:
    38
    Location:
    DEVON ENGLAND
    Hi Glen, got the bike in one sad bit.
    If you check out my posts you will find some progress photos, they might not be under obvious headings, but they are all there.
    where are you in aus?
     
  14. gunnabuild1

    gunnabuild1 Member

    Messages:
    607
    Likes Received:
    2
    Trophy Points:
    18
    Location:
    Australia
    I'm in Ipswich Qld mate about 30k west of Brisbane.
    I suspect your bike is going to look better than showroom condition when your done!
    Glenn
     

Share This Page