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Thread: 1985 YTM 225 DXN Carb Questions

  1. #16
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    Quote Originally Posted by Afrothunderkat View Post
    https://scontent-b-iad.xx.fbcdn.net/...24&oe=537D0D55

    Had a 32mm off a KX80 on my dx and it worked great
    lol... nice video!

  2. #17
    barnett468 is offline FACT ! I have no edit button Arm chair racerThe day begins with 3WW
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    hello;




    great offer by Muthey.

    I would also check the actual gas level first by doing the following: If the level is good or can be corrected, and it maintains that level, your float needle is not leaking much if at all.

    1. get a small 10” long piece of clear plastic tube.
    2. connect it to the float bowl drain fitting.
    3. hold it close to the carb with the open end even with the top of the carb.
    4. open the gas valve on the tank and drain screw on the carb bowl.
    5. the gas in the tube should be around 1/8” plus or minus 1/16th below where the bottom of the main carb body where it meets the float bowl. If it is around 1/16th outside this range it should still work but should be corrected. If it is out of spec by more than that it might cause significant probs.

  3. #18
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    Quote Originally Posted by barnett468 View Post
    hello;




    great offer by Muthey.

    I would also check the actual gas level first by doing the following: If the level is good or can be corrected, and it maintains that level, your float needle is not leaking much if at all.

    1. get a small 10” long piece of clear plastic tube.
    2. connect it to the float bowl drain fitting.
    3. hold it close to the carb with the open end even with the top of the carb.
    4. open the gas valve on the tank and drain screw on the carb bowl.
    5. the gas in the tube should be around 1/8” plus or minus 1/16th below where the bottom of the main carb body where it meets the float bowl. If it is around 1/16th outside this range it should still work but should be corrected. If it is out of spec by more than that it might cause significant probs.

    Good idea!
    ill try it after work (I hope) if it doesn't rain.
    thanks!

  4. #19
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    Ok, i may have got it this time. I took off the carb again and re installed the pilot screw in the correct order, then i checked the intake for cracks and didn't see anything, i then put the more pointy needle back into the slide, then i picked the best looking needle valve of the three i have and put it all back together thats when i noticed the slide wasnt going all the way down. I pushed the throttle a few times and the slide would come down but not all the way so i took apart the slide and cable and then i compared the stock carb to the aftermarket one and the slide chamber on the newer carb is about a 1/4" shorter than the original. I messed with the cable some more and got the slide to go all the way down, installed everything and it fired up, i had to mess with the air screw and idle screw to get to run and idle... Now, it starts up, idles and seems to run good, has power and all but when i hit the gas then let off like say, going into a corner, it does the whole pop pop thing when you let off the gas... Should it do that or is that a jetting issue?

  5. #20
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    that's a jetting and air filter issue, or it could be a exhaust leak somewhere. I'm pretty sure you have already checked the valves but incase you haven't give them a good check.
    rectum nothin damn near killed them
    feel free to leave feed back for me here. http://www.3wheelerworld.com/showthr...06#post1119306

  6. #21
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    It could be caused by the 2 stroke muffler you got on there not giving it the right amount of back pressure I know that is often caused by not having proper exhaust back pressure.
    " I had recently put a muffler on it from a YZ 250"
    Last edited by Jwmajic; 05-21-2014 at 11:15 PM.

  7. #22
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    Check the exhaust doughnut too.

  8. #23
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    Quote Originally Posted by muthey View Post
    that's a jetting and air filter issue, or it could be a exhaust leak somewhere. I'm pretty sure you have already checked the valves but incase you haven't give them a good check.
    No, I haven't dared mess with the valves yet...lol
    It wasn't doing the popping thing before, with the after market carb that's why I just figured its a jetting problem or air/fuel mix problem. It seems like it was popping out of the carb, could it still be an Exhaust issue?


    Quote Originally Posted by Jwmajic View Post
    It could be caused by the 2 stroke muffler you got on there not giving it the right amount of back pressure I know that is often caused by not having proper exhaust back pressure.
    " I had recently put a muffler on it from a YZ 250"
    Maybe should I just look for a good used 4 stroke muffler?
    What's the difference in 2 stroke vs 4 stroke muffler anyhow? the baffle?
    Also, what should I look for, as an example, one from another 225, 200 or 250 4 stroke or does it matter if its from a bigger ATV like 600 or 400 or so? From what I have been reading around the web that others have used, I just figured a muffler was a muffler.

  9. #24
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    Quote Originally Posted by muthey View Post
    that's a jetting and air filter issue, or it could be a exhaust leak somewhere. I'm pretty sure you have already checked the valves but incase you haven't give them a good check.
    if I wanna buy a couple new jets to try, what do I look for, does it matter what I buy as long as they are for a Mikuni round slide VM carb? or do I need the exact carb part number and such? do you think I should go bigger on both the #112.5 and #20?
    thanks!

  10. #25
    barnett468 is offline FACT ! I have no edit button Arm chair racerThe day begins with 3WW
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    hello

    the popping could be a few things especially with a high perf exhaust or straight pipe. it does not automatically mean that it is improperly jetted or your valves are leaking. i guarantee you 110% that all the camel series 1/2 mile bikes as well as many others are perfectly jetted and pop like the dickens upon decel. do not jet to remove the pop. jet it so it runs properly under acceleration and it will do what it wants on decel. if the valves are leaking, it will miss or pop under acceleration also. its quite simple, but do check the things mentioned by others anyway.

  11. #26
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    Quote Originally Posted by barnett468 View Post
    hello

    the popping could be a few things especially with a high perf exhaust or straight pipe. it does not automatically mean that it is improperly jetted or your valves are leaking. i guarantee you 110% that all the camel series 1/2 mile bikes as well as many others are perfectly jetted and pop like the dickens upon decel. do not jet to remove the pop. jet it so it runs properly under acceleration and it will do what it wants on decel. if the valves are leaking, it will miss or pop under acceleration also. its quite simple, but do check the things mentioned by others anyway.
    cool, thanks!
    I did not notice anything on acceleration only on decal. I will take it up the road tonight and open it up and see what it does. I can only get into third gear in my yard and by that time im hitting the break and down shifting to save my butt...lol but the next door neighbor has about 1200' of dirt road for a driveway and I use it as a test track every now and then. lol

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