Need advice on Oil mixture

Discussion in 'Motorized Bicycle General Discussion' started by Shobiz1492, Feb 13, 2013.

  1. Bikeguy Joe

    Bikeguy Joe Godfather of Motorized Bicycles

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    It puts an undue load on the wristpin and crank, and may cause detonation to be more likely to occur.
     
  2. SubieGuy

    SubieGuy New Member

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    My "break in" consisted of 1 tank of 30:1, using non - synthetic oil, varying throttle, not afraid to got wide open. Then I switched to a semi synthetic oil, and changed the ratio to 50:1. Haven't had any problems, in fact I feel it runs better and better everyday!
     
  3. jji7skyline

    jji7skyline New Member

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    It doesn't really matter all these tiny details... these engines seem to get better every day until they break down. That's what I've found anyway :p
     
  4. Bikeguy Joe

    Bikeguy Joe Godfather of Motorized Bicycles

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    They run better and longer if you pay attention to the "tiny details". :)
     
  5. Shobiz1492

    Shobiz1492 New Member

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    And the chain tentioner.... What's the deal on that, what happens if I have it to tight, or too loose compared to the .5 inch it is supposed to be at?
     
  6. Groove

    Groove New Member

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    Not a huge deal IMO. Too tight will stress the chain a bit. Too loose will not hurt much either, unless it comes off.the darn sprocket and damages bike.
     
  7. Shobiz1492

    Shobiz1492 New Member

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    what kind of grease should i use for the gear that goes into the motor, it sounds like it should be greased up a bit cuz it squeeks when ever i pull the clutch
     
  8. Russ McClay

    Russ McClay New Member

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    Hey there...

    You'll get a lot of opinions about this subject which as been discussed many times. I'm a newbie with only 400 miles on my first build, but here's my experience:

    I used a 16:1 mix (Castrol 2T) for the first couple of gallons of gas. I think that is actually a bit too much...but it was OK. Then I went to 32:1. Just checked the plug today and all is well. I could actually go for a tiny bit more oil. Like 34:1 according to the plug color.

    Here's the best chart I've found, thanks to a post by Dave31:

    http://www.dansmc.com/spark_plugs/spark_plugs_catalog.html

    Very important to check the plug. Don't take it out when the motor is hot.
    Wait for the motor to be cool.
     
  9. Groove

    Groove New Member

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    So it squeeks when the drive train is engaged you mean?
     
  10. maniac57

    maniac57 Old, Fat, and still faster than you

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    Very good advice here.
     
  11. maniac57

    maniac57 Old, Fat, and still faster than you

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    The bar inside the clutch cover needs grease.
    (It's in the center of the drive sprocket)
    Pull it out and grease it well and squeak will stop.
     
  12. Shobiz1492

    Shobiz1492 New Member

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    yeah when i pull the clutch it squeeks
     
  13. Shobiz1492

    Shobiz1492 New Member

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    what if i use premium gas instead of unleaded? would it be better because its a better octaine
     
  14. Shobiz1492

    Shobiz1492 New Member

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    what type of grease do i use for doing that?? and if i was to grease it, would it be the small cover where the chain attaches to the motor or the large one?
     
  15. Bikeguy Joe

    Bikeguy Joe Godfather of Motorized Bicycles

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    That plug chart is for four strokes.... I would say dial it back SEVERAL steps for two strokes, and don't worry so much about having a slightly "oil fouled" appearance, as these engine are two strokes.

    You want a chocolate brown or slightly tan as your lightest color.

    This one is actually much better and supplied by Dave31 as well.- http://www.bcchapel.org/pages/0003/pg11.htm
     
    #35 Bikeguy Joe, Mar 7, 2013
    Last edited: Mar 7, 2013
  16. Bikeguy Joe

    Bikeguy Joe Godfather of Motorized Bicycles

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    Any wheel bearing grease or lithium grease, or for that matter, and grease from a grease gun. It's behind the smaller cover on the left side of the engine.
     
    #36 Bikeguy Joe, Mar 7, 2013
    Last edited: Mar 7, 2013
  17. Bikeguy Joe

    Bikeguy Joe Godfather of Motorized Bicycles

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    No, it's a waste of money. Our engines are low compression, and don't benefit from high octane.
     
  18. Russ McClay

    Russ McClay New Member

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    I didn't realize that chart was only applicable to 4-strokes.

    Russ
     
    #38 Russ McClay, Mar 7, 2013
    Last edited: Mar 7, 2013
  19. Toadmund

    Toadmund New Member

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    I have been using high octane because the lower octane contains up to 10% ethanol.
    Ethanol is not the best for your little motor.
     
  20. Wickedest1

    Wickedest1 Member

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    as far as oil mix, i followed joes advice...24:1 for the first 3 tanks then 32:1 after that...16:1 is too thick and will eventually result in fouling your plug and or killing your engine due to carbon build up

    id like to say something on gas octanes here: i run 93 octane at 32:1 with valvoline synthetic multipurpose 2 smoke oil. I also have run 103 octane at 32:1 oil mix and the difference is extremely noticeable... the higher the octane the cleaner the burn...clean burn equals better combustion which in turn DOES make a difference...ive also been stuck using 87 octane and had to change a top end shortly after doing that...

    i prefer to use mobil 93 octane gas...seems to be less crap in the gas and has continued to be of great burn for my china girl...

    this is just my opinion...
    (from personal experience)
     
    #40 Wickedest1, Mar 7, 2013
    Last edited: Mar 7, 2013

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