Idle Adjustment Screw

Discussion in '2-Stroke Engines' started by davidsis, Nov 25, 2006.

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  1. davidsis

    davidsis Guest

    How do I adjust the idle. It is a howel motor 48cc or 50 or whatever. At the trottle grip or at the Carb. Also, what is up with that screw on the carb. The one with the spring on it. also, there is a little metal thing that looks like a primer from a gun next to it like a little button. What is that? Finally, what kind of clutch do I have, and is it okay to ride it to get the bike going good, or will it burn it up? It is a howel motor How many horse power do I have. Sorry about all of the questions. I am just stoked about my bike.

  2. gone_fishin

    gone_fishin Guest

    i think the spring-loaded screw is idle, tho it acts more like a mixture screw.

    the little metal thing is a bowl vent, don't know much more, but i promise to research it.

    you have a plate clutch, slow engagement is best.

    HP? i've heard many different claims...anyone know for sure?

    please, anyone knowing more than this...speak up.
  3. Steve

    Steve Guest

    Don't know if this is true for all kits, but my King's motors kit has two adjustment screws for idle, one on the top of the carb where the clable goes in, and one on the throttle where the cable goes into in. Basically, they adjust the length of the cable outer sheath, as the inner cable length is fixed. The adjustment screw on the side of the carb with a spring under it, should be the mixture screw. As with all two strokes, you want to adjust it to prime (most power) and then unscrew a bit so it does not over heat, especially on break want it so rich it almost four strokes.
  4. Tom

    Tom Active Member

    Aug 4, 2006
    Likes Received:
    My kit has the spring loaded screw for the idle, and then you can change a setting on the pin in the carb if you want to mess with the mixture.

    Dax 80cc kit
  5. davidsis

    davidsis Guest


    Lots of useful information. I can not believe that there are this many people interested in these things. I have not had this much fun since I sold my AK 47.
  6. gone_fishin

    gone_fishin Guest

    considering how into your bike you are, i for one am damned glad you got rid of the weapon 8)
  7. srdavo

    srdavo Active Member

    Nov 4, 2006
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  8. gone_fishin

    gone_fishin Guest

    i was so worried about a low idle that i had NOT brought the top adjuster out far enough...thus depriving myself of full-throttle, can't wait to get out there and check it out!!!

    all of us deserve a pat on the back, this forum is really good shtuff, eh?
  9. gone_fishin

    gone_fishin Guest!!!

    80 mile report: using 40:1 pre-mix, had to retighten plug and head bolts, gutted muffler*, followed above info about carb.

    another 8-10mph, no sh*t!! i buried the needle on my analog speedo, translating to about 38-40mph :twisted: :twisted:

    * if you drill more than one hole, might as well just cut it off at about 1.5in, same flow capacity either way, wutta nice throaty characteristic that gave the exhaust, not too loud at all 8)
  10. Cookie

    Cookie Guest

    Augie did you think we would lead your wrong :roll: :lol:

  11. gone_fishin

    gone_fishin Guest

    nope, might, however, lead me to my grave :twisted:

    i'm buying myself some real leathers for christmas :)
  12. Cookie

    Cookie Guest

    Kool what kind of leathers .....I have my black pants (with horse hair tassels at the side of the knee with silver conchos one on each knee)

    for moderate cold weather I have a brown bomber jacket that I applied a large falcon on (after I tooled it ) and I have a heavy black thing that is hot and bulky but once in awhile you need that down here.

    Augie you are the resident mechanic I have a weird problem my engine is idling ruff and back firing once in awhile it acts like it wants to buck me off
    I have cleaned the plug adjusted the idle an nothing is working although I think I have just about run the life out of this puppy.

  13. gone_fishin

    gone_fishin Guest

    cookie, i really appreciate that "promotion" but until i encounter something for myself, i'm clueless...lemme get my isp service back this friday, then i'll research for ya, 'k?

    (i would guess"timing" but what is adjustable on these, if anything? oh, yeah, when's the last time you checked the carb bowl? float still floating?)
  14. Cookie

    Cookie Guest

    Great minds think alike :)
    Well here I was sitting out side my shop cooking a roast and home made bread in the house but I could not smell a thing but old oil and gas (GEAR HEAD !!!)

    sitting with a cigaret and disassembling my bowl and wow did it have a lot of CRAP in it no wonder it was trying to cut out (have to put a fuel filter in line again. Went to start the bike and she grumbled a little then ran like the ol race horse she is I wanted to just keep riding but I still have customers coming in.

  15. gubba

    gubba New Member

    Oct 11, 2008
    Likes Received:
    The little screw on the side with the spring ONLY raises or lowers the idle speed.
    On top of the carb is a large threaded "cap" and a small one above it. The large one cannot be too tight, it will keep the cable from sliding smoth. Finger tight and then back off a hair. Tighten the top one down to the large one snugly.

    The little "push" button nest to the screw does not prime the carb. Push it down and hold for 2 seconds. Just once! This pushes down the float and fills the bowl. Repeated pushing runs the bowl over and flood the carb.
  16. h0tr0d

    h0tr0d Member

    Feb 11, 2008
    Likes Received:
    Thanks for the response Gubba, but I think he has it figured out by now. This thread was almost two years old before you brought it back from the dead. Welcome to the site. Post some pics of your bike for us.