Tuning

Discussion in 'General Questions' started by Frankfort MB's, Jun 12, 2016.

  1. Frankfort MB's

    Frankfort MB's Well-Known Member

    I have been tuning my new 2015 grubee skyhawk that's on my board track racer and I did some carb adjustments wanted to know how rich or just right I am....

    First pic is full throttle (no load)

    Second pic is half throttle (no load)

    Off topic- it's the hottest day of the year in my opinion (90 degrees 50% humidity) and I'm outside doing experiments on my bicycle.... #prioritys ;)
     

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  2. Frankfort MB's

    Frankfort MB's Well-Known Member

    Here's another full throttle test (half load, burnout if your wondering;))
     

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  3. butre

    butre Well-Known Member

    grab a new plug, do a full throttle full load run, and as soon as the RPMs stop climbing shut it off and pull in the clutch.

    I can't tell you anything from a no load plug chop. it's just trash data.
     
  4. Frankfort MB's

    Frankfort MB's Well-Known Member

    Okay thanks for the heads up, I'll try and do it tomorrow....

    Thought I had an A+ on the test but actually you have to use your brain instead the answers on your arm;)
     
  5. butre

    butre Well-Known Member

    by the way, when I say "shut it off" I mean while it's still wide open throttle and moving, either use the kill switch or if you've omitted it pull the cap off the spark plug
     
  6. Frankfort MB's

    Frankfort MB's Well-Known Member

    I don't like getting the crap shocked out of me... Last time I did that I was changing electrical sockets, FYI turn off the electric before you do this lol
     
    Marine One and Hello Moto! like this.
  7. breakingaway89

    breakingaway89 New Member

    Yes, you must turn off the electricity before doing anything
     
  8. butre

    butre Well-Known Member

    if it shocks you it won't be that bad. especially if you wear gloves
     
  9. Frankfort MB's

    Frankfort MB's Well-Known Member

    Full throttle run (full load)
    She likes to 4 stroke a little on half throttle but my NT doesn't have needle adjustments
     

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  10. butre

    butre Well-Known Member

    that looks pretty good, but what oil are you using at what ratio?
     
  11. Frankfort MB's

    Frankfort MB's Well-Known Member

  12. Frankfort MB's

    Frankfort MB's Well-Known Member

    I'm not exact on putting oil in my mixing jug lol

    I'm using full synthetic stihl HP chainsaw oil at about 32:1
     
  13. butre

    butre Well-Known Member

    I would personally reduce to 40:1 and lean out the jets accordingly, but if it's running fine then there's no reason to change.
     
  14. Frankfort MB's

    Frankfort MB's Well-Known Member

    That's about what i thought;)
     
  15. jaguar

    jaguar Well-Known Member

    30:1 synthetic is good for extreme use like keeping the engine at top RPM for a long run.
     
  16. Frankfort MB's

    Frankfort MB's Well-Known Member

    I'm either full throttle or idleing, usually no in between
     
  17. jaguar

    jaguar Well-Known Member

    actually 40:1 is OK for these engines because max rpm for those without the exhaust port raised is no more than 6000.
    synthetic is nice for its lack of smoke, no drooling out of pipes, and lack of residue left on engine parts.
     
  18. Frankfort MB's

    Frankfort MB's Well-Known Member

    I've raised exhaust:D
    So I guess Im just about right
     
  19. Frankfort MB's

    Frankfort MB's Well-Known Member

    Plus also from what I've heard the 2015 model skyhawk would easily revv to 8000 RPMs, I know it doesn't vibrate as much
     
  20. jaguar

    jaguar Well-Known Member

    yeah and I've also heard they can go 50 miles an hour.
    so I highly doubt that claim.
     
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