A forum for owners of Yamaha TTR250 trail and enduro bikes!

Members Login
Username 
 
Password 
    Remember Me  
The TTR250 FAQ web pages -> TTR250 -> Repairs and maintenance -> Bike isn't pulling fuel
Post Info TOPIC: Bike isn't pulling fuel
Capitalcrew


Newbie

Status: Offline
Posts: 3
Date:
Bike isn't pulling fuel
Permalink  
 

Hey there. I recently got a ttr250 from a friend that has been sitting, i replaced the diaphragm, the two orings next to it, the seal for the float bowl, cleaned the jets, cleaned the little hole from the diaphragm into the float bowl, cleaned the routes to the side cover and the jet into the carb from there.  Bike runs well on fuel poured into it but will not suck fuel on it's own. Pet**** has been cleaned as well. I'm at a loss. 



__________________
ERBS


Veteran Member

Status: Offline
Posts: 72
Date:
Permalink  
 

Try cleaning out the fuel tank if you not already done this

__________________
yamaha42


Senior Member

Status: Offline
Posts: 123
Date:
Permalink  
 

Sounds like your needle and seat is sticking.

__________________
Capitalcrew


Newbie

Status: Offline
Posts: 3
Date:
Permalink  
 

I thought that as well, cleaned it as best i could. It definitely works and allows liquid passed with the bowl off.

__________________
TTRfan


Super Guru

Status: Offline
Posts: 8565
Date:
Permalink  
 

Does petrol come out if you loosen the drain screw at the bottom of the float bowl?

That would at least show if fuel is flowing through from the tank.

Brian



__________________

Exeter, Devon, UK

http://www.ttr250.com  - The one and only dedicated TTR250 FAQ!  

TIP: For easy viewing bookmark the "Recent Posts" view - http://ttr250.activeboard.com/p/recent/ 
Capitalcrew


Newbie

Status: Offline
Posts: 3
Date:
Permalink  
 

The drain screw it set up solid. Fuel does go through the pet**** and the line if the line is off of the carb.

__________________
Cubber


Super Guru

Status: Offline
Posts: 2608
Date:
Permalink  
 

Sounds to me like the carburettor needs looking at. 

If it's been neglected for a few months then it may be gummed up by sediment and dross from old petrol.

Modern ethanol additives in petrol are hygroscopic and are known to attract moisture.
This petrol has also been found to "eat" certain metals and plastics.

I'd recommend a complete carb. dismantle, clean (ultrasound bath?), check and reassemble.

Martyn

 



__________________

You're never too old to learn something stupid

East Budleigh. Devon
JDM_stig


Veteran Member

Status: Offline
Posts: 53
Date:
Permalink  
 

does it suck fuel with the fuel filler cap off/loose?


__________________

I aint no fool
Aussie Paul


Veteran Member

Status: Offline
Posts: 33
Date:
Permalink  
 

My bike had been sitting for 8 years. I cleaned out the carburetor ( or so I thought ) but it would still not pull fuel.. I found I had overlooked the tube into the carburetor (as per pic) It was totally blocked full of sediment, from what I don't know. maybe just the fuel turned to crap. Maybe because I never turned the petvalve off (proper word would be blanked out smile) when I last rode it.

worth a checkIMG_1275.JPGIMG_1277.JPG



Attachments
__________________
Page 1 of 1  sorted by
 
Quick Reply

Please log in to post quick replies.
The TTR250 FAQ web pages -> TTR250 -> Repairs and maintenance -> Bike isn't pulling fuel


Create your own FREE Forum
Report Abuse 		Powered by ActiveBoard