too much fuel/rich condition

Ok.. right off idle it has a stumble... its really noticable... but soon as i get past the say 1/8 throttle its fine.. I have the zipty air unit.. im going to put the stock back in and give it a go.. it runs really good up top and what not...when it idles or low rpm it seems to have a popping aswell.. and when i took the carb out today, the idle was almost maxed out.. and the air screw was at about 1.4 ish turns and it idles i dono about 2000 ish.. dont wana stall it cuz its hell to start when its hot.. then when its hot it seems to flood.. was going over ideas and idea came up maybe it thinks its lean from too little air or what ever and gives it too much fuel. Soon as i drain the fliud a ltitle bit and wait couple minuts the first good kick gets her started... and right before its about too run out of fuel it idles up really high like it should be with the way the idle is set... any help id love it lol

and also when i moved the air mixture unit it does idle up and what not but it doesnt make much of a diff the best spot i could find was just over 1 and a bit turns or else it just poped and craped out even more

Check to see that you haven't installed the slide plate upside down. It's an extremely common mistake. The rounded edge goes UP, and the flat side with the small hole near the edge belongs on the bottom.

i never took it out but ill check to see

All this work you've done to the carb and you never had the slide out?

had it out once, and its in the correct way. I put the carb back to complete stock, and the stock screw back in but i dont wana use it cuz i cant adjust it and so i guess ill have to wait till the merge ones get here

any other possibilities?

Check the AP timing per the manual mechanically or view the squirt through the carb. There are many posts on this if you search.

This was a problem for my YFZ and the cure was properly adjusting the AP timing and a one size smaller leak jet. This assumes your pilot, main, and needle settings are where they need to be. I adjust my pilot circuit with a tach.

It seems too only happen when its in gear too...

try moving your needle up by putting you clip a notch or two down....and what elevation are you riding at, and what temp??You might want to try a slightly bigger pilot jet as well.

uhm i ride usually 100 feet too any where tooo 4500.. 80% is around the 1000 foot level.. and its around 25C, 80F ish we ride.. moving the clip up wouldnt do anything abot the nothrottle too 1/8th tho would it

got it fixed... all thoe problems due too a crapy screw.. thanks to all that helped.

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now

  • Similar Content

    • By faizakhtar125
      Hey guys I just bought a bike last night. So the seller said the bike will turn on but then die. We didn't try it because it was really late at night and it was raining (seat was wet). But he said if you bump start it, it will turn on and ride. So what do you think the problem is? I just want to make sure it runs... I probably won't be able to bump start it till Saturday (rain)... It's a four stroke, and I know absolutely nothing about them. Thanks.
    • By dpenn1
      I could use some feedback, My son is getting into off road riding so I have starting getting back into it as well.  We mostly do trail riding but did some MX track riding last year and he loved it andso did I.  I have a 2003 TTR 225, it's nice that it has an electric start but the suspension is too soft and it doesn't have enough power for my liking.  When I was riding the MX track I was having issues bottoming out on the larger jumps.  I want to change to a more off-road capable bike.   I won't ride it much and don't want to spend a lot of money, I think I prefer a 2 stroke, when I was younger, in 1990, I raced an 89 RM250 and loved it.  I am looking at a 96 RMX 250  and a 98 YZ400F, both bikes look to be in good condition and around a thousand dollars.  I like the RMX because I think kicking a 2 stroke 250 should be easier than a 4 stroke 400 and the simplicity of the 2 stroke engine.  The 400 sounds good because of the low end torque I assume it has but the cost of rebuilding the 4 stroke if needed worries me and I have heard they are hard to start. Should the RMX be decent for an occasional trip to an MX park?  Any thoughts on these two bikes? 
    • By yz480doinwork
      Brand new, still in the packaging Lexx end cap fits the stock muffler of 2006 & 2007 YZ450f and 06-13 YZ250f. Comes with a forest service approved spark arrestor and two different size tips. Don't spend hundreds of dollars on a slip on, this tip can be quiet and forest legal or loud and make power! Also a note for WR450 guys: get this tip and find a used 06/07 YZ muffler, fits directly on 09-15 WR450. $80 shipped free to the lower 48. PM, call or text 406-223-8789
    • By Woody Oakson
      So I have a 2008 yz450f and I would like to add some LED lights to it to make it street legal. Mainly just a headlight and a tail light and turn signals if I need to (which where I live hand signals work).
      So where I need help is getting power from the stator to a battery. Wiring from a battery to anything else I got and understand and don't need help with (but recommendations are welcome). So my questions are.
      What type of power is coming from the stator. AC or DC? Will I need a regulator or rectifier? How do I wire something from the stator to charge a battery? What would that wiring look like? Would this stator work? Anything else I should know? Any help would be appreciated. Thank you.