Benefits of running premix?

Discussion in 'General Tuning' started by Aaron Hastings, Jun 19, 2012.

  1. FiddyRox

    FiddyRox Well-Known Member

    Messages:
    1,112
    Rides:
    Aerox, CRF450, YZ125
    Oh I get you.

    Yeah my mate runs an oil pump and like 30ml of oil in the tank or something, if I were you I'd just get an adjustable pump off pedparts.
     
  2. Chubz

    Chubz Well-Known Member

    Messages:
    1,079
    Rides:
    70cc Aerox 04'
    im never too clear with what i say most times haha.....

    erm, whats the adjustable ones? dont think theres nout wrong with my oil pump, just not too sure about why it has these weird outbursts of dying and having to push the man. choke in.... thought if i put oil in with the petrol just the slightest amount it might run a bit smoother... ?probably completely wrong tho lol
     
  3. caine aerox stalker

    caine aerox stalker Member

    Messages:
    122
    mate take the pump of. the engine revs higher and mix 25mm to litre of petrol so 3 litres 75mm
     
  4. Jonnymarrw00t

    Jonnymarrw00t Moderator Staff Member

    Messages:
    3,243
    Rides:
    Piaggio Zip 05 plate
    I personally running 33:1 or 40:1.
     
  5. LittleTomos50

    LittleTomos50 Bore-Kit Bruiser

    Messages:
    40
    Rides:
    Semi-Race Tomos A3K
    I personally much prefer pre-mixing. Once you've had an oil pump go, you'll see why! but realistically, there isnt a whole lot of benefit to premix other than peace of mind. be warned, for proper performance you cant just pour a rough amount in and go "oh that's ABOUT 35:1" You need to be pretty much bang on. I run a 24:1 ratio on Motul 800 Factory Line pre-mix and can highly recommend it. Plug is clean and next to no varnish on the piston
     
  6. Chubz

    Chubz Well-Known Member

    Messages:
    1,079
    Rides:
    70cc Aerox 04'
    i just got a stage6 measuring thing, but havnt got much petrol haha...

    so i put a tiny bit on th handle of a teaspoon
     
  7. caine aerox stalker

    caine aerox stalker Member

    Messages:
    122
    ye a tea spoon it 5mm i used to use it for abit but i looked like a spoon at the petrol station lol hahah
     
  8. Chubz

    Chubz Well-Known Member

    Messages:
    1,079
    Rides:
    70cc Aerox 04'
    loool i can imagine..

    someone fills up then pulls a spoon out the seat.... id be thinking along the lines of drugs lol...
     
  9. caine aerox stalker

    caine aerox stalker Member

    Messages:
    122
    hahahahahahahahahaha
     
  10. murerg

    murerg MBK Hero!!!

    Messages:
    744
    Premix on standard or similar performance engines, other than for peace of mind, is pointless. Yes you are sure your oil pump wont fail but that s about it.

    The low end 70cc (DR, Top perf...) will not benefit from premix. Tuned engines on the other hand will, simply because the required ratio oil/petrol differ from the standard oil pump. Be aware that the type of oil (and quality!) and the ratio can affect the performance of the engine itself.

    It is recommended to mix oil and petrol using a bottle mixer so you know exactly your ratio, and for info, adding a spoon of oil to your fuel tank at the station isnt the best way to go as the viscosity of the petrol and oil arent the same so chances are they wont go through the fuel hose properly mixed! :) ... And we all know what happens if there isnt enough oil ...
     
  11. caine aerox stalker

    caine aerox stalker Member

    Messages:
    122
    yes ovs u just hav a babys bottle lol measures 25mm to 100mm so i mix 25 to 1 litre u hav to get it ryt every time its very importent
     
  12. murerg

    murerg MBK Hero!!!

    Messages:
    744
    The ratio is very important. Adding too much oil isnt good and neither is not putting enough :p You can generally find recommended premix ratio from manufacturers or you can do some testing with precautions. Jetting must be adjusted accordingly.
     
  13. caine aerox stalker

    caine aerox stalker Member

    Messages:
    122
    ye the best ratio for myn and most 70s it 25 to 1L
     
  14. Alpal

    Alpal New Member

    Messages:
    18
    every time you fill up just put a splash in not to much though lol. my rox is premix, its easier to get to the engine ect and its suppose to be a lot better for high revving engines, shouldn't really run it less than 30:1
     

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