Carby Need someones input here CNS carb

Discussion in '2-Stroke Engines' started by wan37, Dec 7, 2011.

  1. wan37

    wan37 Member

    I have a CNS carb that came with grubee sky hawk 48 cc kit.I can't seem to get it from running rich.I almost tried everything I can think of like the I'm running 32to1 oil gas mixture and the e clip is all the way up on the needle.So shoot me some other ideas.Thanks
     

  2. jaguar

    jaguar Well-Known Member

    Make sure the float is at the right distance from the body of the carb when it shuts off the fuel flow. If it is higher than it should be then it is allowing a higher fuel level. Fuel closer to the suction point means theres less resistance to flow and so you get a richer mixture.
    If thats not it then solder the main jet closed and use a micro bit to drill a hole a smaller size.
     
  3. wan37

    wan37 Member

    Thanks I adjusted it once where it wouldn't over flow so I thought that it was good then but it's funny you said that because i was wondering about the if I should adjust it more. The problem is that it run really good and idles really good it's just black on plug.I just didn't want to hurt the engine being rich.
     
  4. jaguar

    jaguar Well-Known Member

    My bike likes to run a little rich which is OK as long as there isnt carbon build up on the plug tip which would interfere with the spark.
     
  5. wan37

    wan37 Member

    I already drill the jets to get it to this point and raised the e clip,It really runs good I'm proud how good it runs and idles big difference from when I first built it wouldn't idle or no throttle.I'll try the float again then if that don't work I'll just change plug every month or so during riding season.Thanks jaguar
     
  6. motorpsycho

    motorpsycho Active Member

    you can't hurt an engine if you run it too rich.
    It may run like ****, but it won't get hurt.
     
  7. wan37

    wan37 Member

    Thanks motor thats really what I needed to hear.
     
  8. motorpsycho

    motorpsycho Active Member

    If you drilled the jet, that would make it run richer. a bigger hole = more fuel.
    unless you soldered the hole closed and drilled a smaller than stock hole in the jet.
    if i'm reading what you wrote correctly, I am seeing that it was running rich and you drilled the jet out and now it runs better?
     
  9. wan37

    wan37 Member

    I had a friend do it for me and he moved away and he's not talking to me because he got a divorce and I don't have his new number.So I guess I will have to look and see what he did to the jets. I think he he said he made them bigger tho.I really hate to do anything to it tho,because it really runs good.If I decide to soldered the jets what kind of soldered do I use.Thanks again
     
  10. jaguar

    jaguar Well-Known Member

    Just use regular solder from Radio Shack. don't use the lead-free solder because it is a lot harder to melt.
     
  11. wan37

    wan37 Member

    Thanks again.
     
  12. Big Red

    Big Red Active Member

    Jets

    Silver solder works best but is harder to use and you would have to flux the peice to be soldered. A regular fluxed solder should work just fine. Motorpsycho is right, too rich won't hurt the engine. It may foul a plug and produce a little carbon build up, but otherwise your engine will be fine. Too lean is very dangerous for an engine. I'd rather have a 2 cycle engine belching a little smoke than none at all.
    You can buy smaller jets, Motorpsycho knows where, and they just screw in. I think the standard size jet they come with is 70mm. I would start off with a 68mm and see how it runs. Good Luck,
    Big Red.
     
  13. wan37

    wan37 Member

    That's good to know were I can get the jets.I think after Christmas's is over I might try to ask motorpsycho where to get them.Plus it's getting time for me to quit riding for now getting cold enough for me.But I really enjoy riding these ht motors.I really thanks all you guys for helping me.
     
  14. Big Red

    Big Red Active Member

    Jetting

    No problemo Bro.
    Big REd.
     
  15. wan37

    wan37 Member

    Here's the funny part about this bike my dad won't let me ride it much he comes down to my house and takes it out for long rides.He is almost 80 yrs old...
     
  16. Big Red

    Big Red Active Member

    Cool

    So yer Dad's a biker, Good for him. Right on Pops.
    Big Red.
     
  17. motorpsycho

    motorpsycho Active Member

    I have a couple of brand new spare jets left but i'm pretty sure that they are all too small...like in the 60- 66 range.
    I sold a bunch of them that i had and I only have a few left.
    But, i know where to buy them if you are looking for a 68 jet.
    If you go to www.sickbikeparts.com they sell individual jets in a bunch of sizes.
    they are delorto jets, but they will screw into an n.t. carb. They screw in tight all the way but they will screw in without damaging the threads. I think the thread pitch is just a tiny bit different.
    I just looked and i see that they are now selling delorto jets that do fit the cns carbs. as well
    i'm pretty sure that the threads for the nt carb are 5 mm, and the threads for the cns carb are 6 mm.
    It all depends on which carb you have.
     
    Last edited: Dec 8, 2011
  18. wan37

    wan37 Member

    thanks motorpsycho it's cns carb I would like to order the 68 I think that would be the one.
     
  19. wan37

    wan37 Member

    I found them I'll order them there cheap enough plus a better air filter.Thanks again.
     
  20. motorpsycho

    motorpsycho Active Member

    No problem.
    you'll like the air filter, which ine did you order?
    I have the low profile "ufo" style filter on one of my bikes and I love it.
    I made a chrome carb stack with a foam filter insert for my other bike.
     
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