Quantcast
Jump to content

Recommended Posts

Posted

Hello guys,

I inherited a 89 Big Bear 350 4x4 and it does not run very well. Carb is very dirty, I'm pretty sure it causes the hard idling and stalling. I haven't had time to clean it but just before leaving my garage I decided to check the timing. At TDC, it seems a little off, like less than 1 tooth. Can this also be a cause the hard idling and stalling?

Thanks 

Mike

20180509_195756.jpg

  • 2 weeks later...
Posted

I think that the timing is ok based on that pic. 

I would really break the carburetor down and clean it good. It has to soak and use a fine piece of wire to clean the jets out.  A piece of a bicycle brake cable works well in the jets. 

Have some air ready to blow out each jet/passageway you clean to make sure the path is open in the carb.

A small can of that air people use for cleaning keyboards is great. 

A lot of people say they cleaned the carb good only to go back and do it again so make sure you do it right the first time. 

The air fuel mixture should be 2-3/4 maybe 2-1/2 turns out from a snug position. 

I think if you start there and see how the bike runs would be a good way to go with a fresh spark plug.  Also lastly make sure the tank is clean and the shutoff valve is clean.  

 

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 rjsummer
      Just some friendly advice on new tires. Check with your ATV dealer. 
      There are so many aftermarket sites, Revco, Royal Distributing, Partzilla, and on and on. Even with their “ big sales”, my local Canam dealer’s REGULAR price beat the tire prices of the 3rd party sellers! People often assume the Dealership will cost them more, but I found this not to be true!
    • By Dutchaaron
      New to the site. Im rebuilding a Kawasaki Bayou 300. The wiring is my biggest challenge.
    • By captnunu
      Good morning, checking in from Southern Ontario, I have 3 quads. 201 Honda Forman 450S, 2007 Suzuki King quad 450 and a 2021 Polaris 570 sportsman. My wife and I do a fair amount of riding but hoping to do more this year. 
    • By toe420
      New member from BC. Anyone else from western canada? 
    • By NickPence
      Just wanted to drop a post to say hello. My name is Nick. I am from the Shenandoah Valley. Rockingham Va to be more specific. I am constantly working on junk or items i pick up from auction, mostly atvs but really about everything. My ATV knowledge is vast but find myself needing assistance regularly. 
×
×
  • Create New...