Quantcast
Jump to content

Recommended Posts

Posted

Hi all,

Picked this bike up about a month ago, and started doing some work on it. I ordered a carb kit from China, but got tired of waiting for it so I went to the bike shop today and picked up a Shindy rebuild kit. Took the carb out of soak, it has been in there for a month, blew all the ports out, cleaned what I could with a guitar string, used air as best I could to make sure everything was clear. After I was satisfied the body was clean I out the kit in it. Got the floats set to 13mm as per the manual (well 12.87 on one side and 12.92 on the other, so close), set the pilot to a little less than 2 1/2 turns out (manual says 2 3/8 turns). Put everything back together and tried to start it, it started and had a week idle. I tried adjusting the idle screw and as soon as I turned it the bike died. Backed it out and tried again, same result. Left it backed out, started it again and gave it some throttle. As soon as the throttle is touch the bike dies. Changed the spark plug for a new one and checked the spark, good and really strong.

I am thinking that I have a bad petcock and am not getting enough fuel to the carburetor. So when I press the throttle I am increasing air but starving for fuel, bike can't run on air alone so it dies. Does this line of thinking make sense? I am gearing up a bottle with a fuel line in it, so I can try gravity feeding fuel to the carb, just have to wait for the silicone to dry so won't be able to test till tomorrow. 

If it turns out to be a bad fuel valve, I will most likely just replace it with a universal one. If I go this route, what do I need to do with the breather line off the carburetor that used to go to the OEM petcock? Block it off or leave it open?

Any help, answers or other ideas of things to check would be greatly appreciated. I have a fishing trip at the end of the month and would love to have my bike running by then. 

Posted

Sounds to  me  it is  too  lean . Try turning the  idle air  screw out a little  more. You  might also  pull the  carb apart again  and check for tiny  posts on the side  of the  the  tube the  main  jet needle is in.  One or more of those tiny orifices  could be  plugged. I  is  not starving  for  fuel   instantly  when  you  give it throttle ,  it  isn't getting the  right  mixture. That points to  a  blockage of  or  setting > make sure there is no  hole in the diaphragm  of the carb and the vacuum line and any  breathers  are routed and connected properly .

 

Posted

Petcock issue as I suspected, going to order a new one tomorrow. Hooked it up to a reservoir,turned on the choke and she started right up. Smoked like mad for the first 30-40 minutes or so, gassed me right out of the garage. I don't think it has ran for quite a while. Let it run for a bit, enriched the mix a little bit and now she's running smokeless. I've got the vacuum lines sealed off right now and am running it in prime. Got the rear end all back together tonight and took it for the first drive since I bought it. Its not perfect, but it was solid for the short 15-20 minute ride. Got a few more things to clean up tomorrow and will give it a bit longer test ride then.  

  • 2 months later...
Posted
1 hour ago, Mitch Judd said:

No I was just doing ten posts so I could download a manual 

Well at least you are honest enough to admit it! The point of asking new members to have a count of 10 items of activity is so they look around the community and consider taking part and not just join to grab a manual and leave. We offer this library of member contributed downloads and the thousands of other items of content to help and bring riders together,

There is a clear announcement in the downloads section that states:

Spamming our website to raise counts will cause you to be banned and lose access to this site. Your IP and username will be blacklisted across major anti-spam services.

  • Like 1
Posted
4 minutes ago, Admin said:

Well at least you are honest enough to admit it! The point of asking new members to have a count of 10 items of activity is so they look around the community and consider taking part and not just join to grab a manual and leave. We offer this library of member contributed downloads and the thousands of other items of content to help and bring riders together,

There is a clear announcement in the downloads section that states:

Spamming our website to raise counts will cause you to be banned and lose access to this site. Your IP and username will be blacklisted across major anti-spam services.

I get that. And if you want to bad my I would understand that as well. I was just given a old quad by my boss.  I'm not totally sure I'm going to get into that much but I hope I do. I apologize for the inconvenience.

Posted
13 minutes ago, Mitch Judd said:

I get that. And if you want to bad my I would understand that as well. I was just given a old quad by my boss.  I'm not totally sure I'm going to get into that much but I hope I do. I apologize for the inconvenience.

No worries, just please keep readers in mind when you post. Thanks.

  • Like 1
  • 3 months later...

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 Dumass
      My name says it all. I have a '03 Honda Sporttrax 400EX with a new aftermarket carb on it that seems to be having issues. I can start it but it idles really rough and when I give it throttle it just kills the engine. I have tried adjusting the idle screw but to no avail. I am in the San Diego Ca area. 
      Any advice will be greatly appreciated. I would also like to get an owners manual for the thing too but can't seem to find a downloadable one.
    • By Trent Finnessey
      So I’ve got a 2000 Honda 400ex absolutely love it!! I’ve had it for about a month, I ride with bruteforce 750’s, outlander 850’s and 1000 sxs’s and I was thinking of getting a trx450r carb and a full hmf exhaust. And probably doing the air box mod too, how much power would this give my 400? Just a little different or a big difference? Cuz if it’s not much of a different I’ll just stick with my dg slip on..... thanks!
    • By DPDISXR4Ti
      I hadn't driven my Kodiak for a two months, and since it was low on fuel, the first thing I did was filled it up to maybe 7/8 full. Getting ready to start it, I rotated the fuel selector switch to "on" and within seconds I smelled and saw fuel dripping onto the floor. I quickly turned it off and the fuel gradually stopped - I can repeat this.
      The fuel is flowing from the hose that is connected to the bottom of the carb, and routes around to the left side toward the wheel well. Any idea what's going on here? It ran fine the last time I had it out.
      Thanks...
    • By jhamrick75
      If anyone is having issues with the Mikuni VM24SS carb, I thought I would post what issues I had and how I resolved them.
      Acquired a 93 Bayou 220 that had sat for over 4 years.
      The carb was extremely corroded and pitted and full of leftover fuel.
      Cleaned carb and bowl and was able to get the engine to start.
      Within 30 seconds exhaust would heat up and start to glow red hot.
      Removed carb and recleaned everything, including a second overnight soak.
      Needless to say, after removing the carb for the 5th time and my frustration to the limit I
      realized that my attention had been to the carb body and not to the bowl.
      There is a small brass rod on the bottom of the carb that goes down into the float bowl but is seperated from the main section. I had cleaned that area very well....I had thought.
      ***The corrosion had sealed off the channel that runs from the main bowl section to the small tube section on the side of the float bowl. No amount of carb cleaner was going to get it to budge. So i took a small nail and started to scrape away the corrosion and was eventually able to dislodge enought of the corrosion that carb cleaner would flow through that channel. ***
      I thoroughly cleaned each side of the channel in the float bowl and reinstalled the carb and now the issue of it running lean is gone.
      On a second note the fuel mixture screw was a nightmare to remove as the threads had been corroded and wouldnt let the screw come out. I used a little cutting oil and worked the mixture screw in and out until I was able to push past the corroded threads and completely remove the needle. After a couple passes with a tap to clean the threads it is like new again.
      Hope this helps if you are having a lean running machine.
    • By P_syko
      Hello all! I’m new to the 4 wheeler world, but not new to the mechanic world. I was a diesel mechanic for many years and last year got into jet skis. I just bought a 1987 Yamaha moto 4 350 and now learning the ins and outs of 2 stroke engines. Looking forward to learning all the things. 
×
×
  • Create New...