Quantcast
Jump to content

2000 Honda 400ex - choke problem??


Recommended Posts

Hey, I cant think of any reasons why, but on my 400ex, when I give it alot of gas and shift through the gears(usually when I get into 3rd) my choke comes on and my wheeler bogs out and dies unless I clutch in and turn the choke off. I cant think of why this would do this. It seems like it started somewhat recently.

Last summer I put a set of rings and valve guides on the 400ex, but ended up gettings rings a bit to big, and the wheeler continued to smoke, so this spring, im going to tear it back down, anyways I wanted to know if anyone knew why the choke was kicking on? I would like to order all my parts at once and do all the work to the wheeler while im doing the topend this spring.

Link to comment
Share on other sites

Thanks for adding the model year, I will add it to the thread title. The only thing I can think of that might cause your choke to is loose, worn parts. I would look into replacing the components of the choke system. I would first take the carb apart and check for any signs of wear to specific parts, that way you don't buy more than you need. BTW, when you tear your machine back down, be sure to check your head for leaks, the smoking could be partly or completely caused by oil leaking past the valve guides/seals. Good luck.

Link to comment
Share on other sites

Thanks for the reply. Im guessing that the choke is due to lose parts, it felt pretty lose but I couldnt find any screws or anything to tighten, ill take a closer look when I have the wheeler apart. As for the valve guides/valve seals, I did the valves last summer, but ill take another look. My guess for the smoke is that oil is getting past my rings, because my rings were all to big. I think my cylinder is just worn, I think ill have to go up a piston size, maybe to an 86mm bore up from the stock 85. But im not sure, ill check it out. Thanks again for the reply :)

Link to comment
Share on other sites

If you did the head, then you are probably right about the rings. You should be able to get piston sets in .5mm increments, so the next size up from stock should be 85.5 if stock is 85. Make sure to have the cylinder measured before buying the piston, just to make sure you haven't worn it to the point that you have to go even bigger. Good luck, hope everything works out well.

Link to comment
Share on other sites

Hey thanks for your reply yet again. That sounds about right to me, last time all I did was rings and the end ring gap was supposed to be .014 for the first and .024 for the second, I was at .034(somewhere in there) and .040(somewhere in there as well) So im guessing/hoping it will be as simple as going up a bore size on the piston..

Just wanted to say thanks again :)

Link to comment
Share on other sites

Anytime, there is actually a thanks tab at the bottom right hand corner of each post, if you want to thank a member officially, you just click that tab and you can add a tag at the bottom of the thread that says that you are thanking said member for this post. I hit the button on your last post to show you how it displays. You are welcome, and don't hesitate to ask more questions if you got them, we are always glad to help out.

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

  • Similar Forum Topics

    • By dalton7545
      ive had an account for years.   cand dowload a manual tho   havent posted enought so here is a post
    • By p5200
      Hello folks, my machine wound up with I think water in the tank etc. It runs but speeds up and slows back down randomly. When not running I don't see gas dripping  from the drain nipple on bottom of float bowl and drain screw is closed tight. With normal idle speed I see no leaking. When the idle speed increases quite a bit on it's own, gas appears to start slowly dripping from float bowl drain nipple? I'm wondering if the carb is flooding and the gas is actually coming from higher up and just appears, to be coming out of nipple but, is actually running down the sides of the nipple? I put a kit in the factory Mikuni carb last year after sitting for a while and I think the gas in the jug I used had drawn moisture. I plan to pull the carb tomorrow and clean everything out. I was just curious if anyone else thinks it's probably something in the carb and is, acutally a flooding problem? Thanks Folks! 🙂
    • By Spritee1
      polaris 2008 50 outlaw automatic: got the 50 for free. would only run with chock on, replaced the carburator with new. I can't get the unit to an idle where the machine doesn't move forward. if I do get it to idle down within a few moments it will die. got something to try?
    • By kawasig
      Hello All
      I'm kinda new to ATVs. I just bought a 1987 Suzuki quad runner 230 Dual Range. I'm having a problem finding info on it. It's very clean, only 2.800 miles. The front wheels are only 30 in.center to center. I was thinking about adding wheel spacers to give it more stability. I realize the added stress on ball joints and bearings. I'm wondering if there are any other concerns? Any input is greatly appreciated!
    • By beast6228
      It's been a long time since I have used a forum, I was the admin of one for quite a few years, had thousands of daily active members, with lots of crazy posts and spammers, so I salute the admins. Anyway, just waving my greasy hands, Hopefully I can help others out.
×
×
  • Create New...