ATV Source.com | Calendar | ATV/UTV Reviews | ATV/UTV News | ATV/UTV Product Reviews | ATV/UTV Racing | ATV/UTV Trails | ATV/UTV Videos

ATVSource.com Social Community Forums

ATVSource.com is a social community site based on the needs of ATV/UTV fans alike.
It is currently Thu Aug 16, 2018 5:16 pm

All times are UTC - 5 hours




Post new topic Reply to topic  [ 8 posts ] 
Author Message
PostPosted: Thu Mar 08, 2012 7:25 am 
Offline
Still on the Trailer Member
User avatar

Joined: Wed Mar 07, 2012 8:58 pm
Posts: 6
Just bought this bike last weekend. It is my first 2-stroke. It runs very strong for about 5 min. And then it bogs down with throttle until it eventually dies. Wont start for a while. Then if I let it sit for a while and then try, I get it to start. Or one time, I gave it choke and it started. What could cause this? The only thing I looked at was the air box thinking it might be choked off. But that looked good. Any ideas?


Top
 Profile  
 

ADVERTISEMENT


PostPosted: Thu Mar 08, 2012 10:24 am 
Offline
ATVing To The End
User avatar

Joined: Fri Nov 21, 2003 4:56 pm
Posts: 3812
Location: Ohio
Clean the air filter and replace/clean the fuel filter or fuel strainer. Then check to see if the fuel tank air vent is clear and allowing air into the tank. The hose sometimes gets clogged, or the little valve in the cap can quit working. The hose can be cleaned out, but if it's the cap valve, it usually means a new cap is in order.

See if that helps.


Top
 Profile  
 
PostPosted: Thu Mar 08, 2012 10:28 am 
Offline
Still on the Trailer Member
User avatar

Joined: Wed Mar 07, 2012 8:58 pm
Posts: 6
Good advice woodsrunner. I did take the air filter out and check it, as that was my first instinct. It was pretty clean. Had no idea about a gas tank breather. I will have to look that over when I head out to the house today. Thanks.


Top
 Profile  
 
PostPosted: Thu Mar 08, 2012 10:41 am 
Offline
Still on the Trailer Member
User avatar

Joined: Wed Mar 07, 2012 8:58 pm
Posts: 6
And would the clogged fuel breather cause a vapor lock that you mention in the other thread?


Top
 Profile  
 
PostPosted: Fri Mar 09, 2012 7:14 am 
Offline
ATVing To The End
User avatar

Joined: Fri Nov 21, 2003 4:56 pm
Posts: 3812
Location: Ohio
The fuel tanker breather (vent) lets air into the tank as the fuel is used to prevent a vacuum, but not allow gas vapors out into the atmosphere. It is basically a one way valve. If it is not working, a vacuum forms in the tank and fuel does not flow into the carb bowl. It will cause exactly your symptoms, IE: running for a few minutes then it runs out of fuel and dies. I have seen it many times,
once it was a tiny spider web home (like a cocoon) blocking the hose.

BTW, just because an air filter looks clean does not mean it can't be plugged with fine dust in the inner levels of the foam. An ATV filter needs to be cleaned regularly whether it looks clean or not.


Top
 Profile  
 
PostPosted: Fri Mar 09, 2012 8:56 am 
Offline
Still on the Trailer Member
User avatar

Joined: Wed Mar 07, 2012 8:58 pm
Posts: 6
Where can I find diagrams of where everything is located?


Top
 Profile  
 
PostPosted: Fri Mar 09, 2012 10:16 am 
Offline
ATV Official
ATV Official

Joined: Sun Aug 07, 2005 5:40 am
Posts: 1032
Location: Seale Al
The fuel tank vent is usually incorperated in the gas cap.


Top
 Profile  
 
PostPosted: Fri Mar 09, 2012 10:20 am 
Offline
Still on the Trailer Member
User avatar

Joined: Wed Mar 07, 2012 8:58 pm
Posts: 6
Roger that. This all makes sense since this bike sat on the farm for the last few years and was barely used.


Top
 Profile  
 
Display posts from previous:  Sort by  






Post new topic Reply to topic  [ 8 posts ] 

All times are UTC - 5 hours


Who is online

Users browsing this forum: No registered users


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  
Powered by phpBB® Forum Software © phpBB Group