100:1 Mix

Discussion in 'Motorized Bicycle General Discussion' started by Retmachinist, Jul 24, 2009.

  1. nhssdf4

    nhssdf4 New Member

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    I run an ngk b6hs spark plug.
    xct2
     
  2. Don P

    Don P Member

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    kristof Hi

    i just broke in my new 66cc motor with opti 2. i mix 1.8 oz pouch with 1 us gallon of mid grade gas and rode it not hard but not easy. just rode it. it will 4 stroke on you some do, some don't so they say. mine did a lot, but that's ok getting plenty of oil that way.
    after the one gallon has run through it i mix 1.3 gallon to 1.8oz of opti 2 and run it from now on.
    i am on my 2nd tank of 100:1 now it runs fine.
    i am in the processes of re jetting the carb now. its a little screamer.

    now that's what i did. DISCLAIMER your results may be different.
     
    #722 Don P, Jul 16, 2011
    Last edited: Jul 16, 2011
  3. Kristof

    Kristof New Member

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    Thanks. Im gonna order Opti - 2 from Amazon.
     
  4. LS614

    LS614 Active Member

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    I had to adjust for my mix too, I'm running the sbp expansion chamber and the dax gtr50r carb, both which use more fuel, and I still needed to change the jet from .75 to .70 to keep from four stroking. It's all pretty easy fixes though to get the powerband perfect! Now all I worry about with my HT is snapping the keys on the chain side sprocket dnut
     
  5. nhssdf4

    nhssdf4 New Member

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    I still cant kill it once its hot.... It just continues to run, even if there is no spark.
    xct2
     
  6. biknut

    biknut Active Member

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    What about trying the next cooler range park plug?
     
  7. LS614

    LS614 Active Member

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    There's an idear :)
     
  8. Mike B

    Mike B New Member

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    Yeah, dieseling is not good. It will destroy your motor.
     
  9. LS614

    LS614 Active Member

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    My goes ZOOOOOM instead of Braaaaaaaap all the way from idle to top speed, that's what you wanna shoot for. No 4 stroking, just the pure dirtbike kind of sound (2 stroke dirtbike that is ) :D
     
  10. Don P

    Don P Member

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    thats what i am shooting for ZOOOOOM instead of Braaaaaaaap. i am beginning to think this nt carb is a pice of !#$$^***(*%$$%&^&**(((((((( translate crap lol i can't seem to find the sweet spot. i think it is MIKUNI TIME!!!
     
  11. LS614

    LS614 Active Member

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    Don, if you get an expansion chamber and the RT carb from dax you'll be set. The RT carb is GREAT for me, I love it! It is monster torque, good quality, and way cheaper than the mikuni!
     
  12. mapbike

    mapbike Active Member

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    Take the jet out of that NT solder it up and redrill it with a #73 wire gauge bit and put the clip on the metering needle second notch from the top and I'll bet you see a big difference in how it runs, just do the good ole plug check to make sure you aint to lean.......

    Peace
     
  13. LS614

    LS614 Active Member

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    Great advice mapbike, and just to clarify to those who never rejetted, there is a HUGE difference between a #73 and a .73mm jet, so be sure you understand what you are doing :)
     
  14. Don P

    Don P Member

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    maybe but i got a bud that has a bunch of 18mm MIKUNI clamp ons from 50cc and 80 cc dirtbikes. i bet i can get one dirt cheap maybe free lol
     
  15. LS614

    LS614 Active Member

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    18mm is pretty darn big, but I still think it's worth a try
     
  16. Don P

    Don P Member

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    mapbike i have been through every number drill from 70 to 74 and ever step on needle and will not stop 4 stroking #73 with top groove on needle gives me best running but still 4 strokes if not in it hard
     
  17. LS614

    LS614 Active Member

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    I really think an expansion chamber smooths these problems out a lot, it makes the engine suck in fuel better and requires richer jetting :)
     
  18. Don P

    Don P Member

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    i agree with you that the expansion chamber is needed to smooth this thing out. but it will be a week or two before i can get one low on FRN Federal Reserve Notes.
     
  19. LS614

    LS614 Active Member

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    That's fine, you'll get one soon :)
     
  20. Don P

    Don P Member

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    I think i will change my name to GOLDMAN SACHS if they need money they just have congress print it for them.
     

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