Need info!!

Discussion in 'General Questions' started by Andres, Nov 18, 2016.

  1. Andres

    Andres Member

    Can a motorized bicycle run on nitromethane??
     

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  2. Andres

    Andres Member

    Also download the candit app and look for a group call Motorized bicycle
     
  3. crassius

    crassius Well-Known Member

    motors are cheap enough to give it a try if you really want to know, but with the metal quality so low, I avoid anything that might make more power and blow out the bottom end
     
  4. Steve Best

    Steve Best Well-Known Member

    Sure can!
    But I would get some more experience with getting to run as designed before trying it.
     
  5. Sasha1234

    Sasha1234 Member

    Can someone PLEASE help me with this dilemma. Okay, so I just went through roughly 3 tanks of the 16:1 (8oz of oil to one gallon gas) ratio and just now put in 20:1 (6oz of oil to one gallon gas) and it ran fine for about four miles. Then it started to die out. I would pull in the clutch and rev the engine and it would rev. But then started to release the clutch and the motor would bog out. WHY?!!!
     
  6. sp1ke

    sp1ke Member

    u mean nos ? not purely but u can inject nos for a boost ive allready got plans and most the bits to do it :p
     
  7. Sasha1234

    Sasha1234 Member

    What? No. I'm talking about a 2 stroke motor kit. Why did it work all this times and now, it's dying on me. Is it the idle screw? This thing doesn't push past 25 mph for some reason. It goes even slower on SLIGHT inclined hills. What's causing all these issues? How can I fix it???
     
  8. sp1ke

    sp1ke Member

    oh most likely crank seals i expect


    if ur carb was set up good bike running well hasnt been touched and is clean it wont be that
    and im sure u checked gaskets on head and bottom of chamber but cant thigure it out
    yeah most likely those seals would be the first guess
     
  9. Sasha1234

    Sasha1234 Member

    I'm lost. How do I check for the gasket? Where is it located? How do I take it out or do whatever it is I'm supposed to?
     
  10. sp1ke

    sp1ke Member

    ok im guessing u are fairly new to working on engines thats fine

    give me a few mins
     
  11. sp1ke

    sp1ke Member

  12. sp1ke

    sp1ke Member

    ok imagine i drew it better thats your engine the red parts are thin around 1mm cardboard like material that air seals the joins in the engine

    the top one between the head and chamber is metal

    if one is gone u loose initial compression in the big end and loose power

    if top one lots of power as u get a massive drop in secondery or main compression at the head




    also in pink there is a rubber seal ill do another pic if this is gone u loose power same as if the big end gaskets are gone u loose the compression at the big end

    these all must be good to get the true power from your engine and is most likely your issue


    check these are sealed i use a gasket sealant to ensure a good seal !


    im more expecting it to be the seals in pink tho
     
  13. sp1ke

    sp1ke Member

  14. sp1ke

    sp1ke Member

    u can get to both of these seals without spliting the big end u can test if u get bubbles spraying them with soapy water to see a leak but id simply replace to b sure the factory give u rubish ones and insteall the poorly
     
  15. sp1ke

    sp1ke Member

    to replace the crank seals remove the magneto and remove the drive cog using its removal tool if u dont have one i can direct u to where to get or plans to make

    then use a screwdriver to rip them out destroying them but ur going to throw them just dont gouge your aluminimum case use a pipe to gentally put new ones in straight and with a bit of grease and this is most likely what you need to do



    another thing is metal warps with heat u may have a warped head preventing a good tight seal this can also be fixed easyly by skimming it

    placeing it on a perfect flat surface and sanding it against that surface i use wet n dry sandpaper on kitchin worktop
     
    Last edited: Jan 5, 2017
  16. sp1ke

    sp1ke Member

    if all these are good and chacked all else is on the carb on a unmodded engine
     
  17. sp1ke

    sp1ke Member

    asumeing all metal parts are in good order piston rings chamber bore the piston sits inside and no cracks or holes in your engine caseing
     
  18. Street Ryderz

    Street Ryderz Well-Known Member

    You may now have to re jet the carb and try dropping the needle to lean it a bit! now that you changed your mix ratio there is more fuel available or it's richer so you may have to lean it out some!
     
  19. sp1ke

    sp1ke Member

    i agree yeah most likely needle was thinking it had worked before carb hasnt been set up u need more air per fuel 1 notch higher on needle drops it down restricting flow of fuel more leaning out your mixture in midrange throttle
     
    Last edited: Jan 5, 2017
  20. crassius

    crassius Well-Known Member

    rare that mixture would sack it out totally - I'd check head gasket
     
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