Fuel tank breather blocked - Page 2 - SV650.org

glang · 14-07-19, 06:17 AM

According to my manual theres two pipes with one as you say a filler drain and the other an air vent which does its job via the cap. However as Orangebud put in his initial post the cap has been dismantled and cleaned twice it only leaves the air vent pipe as a possible source of the problem....

SV650rules · 15-07-19, 07:34 AM

Bikes destined for USA ( like most cars in rest of world ) have a charcoal canister at the end of a breather pipe from fuel tank - supposed to neutralise the petrol fumes - maybe Suzuki leave the pipe and just do not fit the canister for models outside USA.

orangebud · 25-07-19, 10:10 AM

So, I've eventually got the time to have a quick nose umder the tank. Pipe from breather valve s clear and not kinked. Ive blown through it, it and the valve in the cap seem clear. Whilst poking about i noticed that the pipe from the fuel pump wasn't fully pushed into place, so i pushed that on firmly.
On testing, something has improved. Its still getting a bit stuttery after 10 mins, and threatens to die if you push the throttle firmly closed, but its better than it was. I'm going to take another look and just check every pipe is firmly in place.
Ive no idea whats going on, but at least its going in the right direction!

maviczap · 27-07-19, 04:22 PM

Make sure none have perished and allowing air in. Had a car that did this to me via a vacuum line

14-07-19, 06:17 AM	#11
glang Member Join Date: Oct 2007 Posts: 537	Re: Fuel tank breather blocked According to my manual theres two pipes with one as you say a filler drain and the other an air vent which does its job via the cap. However as Orangebud put in his initial post the cap has been dismantled and cleaned twice it only leaves the air vent pipe as a possible source of the problem....

15-07-19, 07:34 AM	#12
SV650rules Member Mega Poster Join Date: Nov 2016 Location: Shropshire UK Posts: 1,363	Re: Fuel tank breather blocked Bikes destined for USA ( like most cars in rest of world ) have a charcoal canister at the end of a breather pipe from fuel tank - supposed to neutralise the petrol fumes - maybe Suzuki leave the pipe and just do not fit the canister for models outside USA. __________________ 2016 SV650 AL7 Courage is resistance to fear, mastery of fear, not absence of fear - Mark Twain

25-07-19, 10:10 AM	#13
orangebud Junior Member Join Date: May 2011 Posts: 23	Re: Fuel tank breather blocked So, I've eventually got the time to have a quick nose umder the tank. Pipe from breather valve s clear and not kinked. Ive blown through it, it and the valve in the cap seem clear. Whilst poking about i noticed that the pipe from the fuel pump wasn't fully pushed into place, so i pushed that on firmly. On testing, something has improved. Its still getting a bit stuttery after 10 mins, and threatens to die if you push the throttle firmly closed, but its better than it was. I'm going to take another look and just check every pipe is firmly in place. Ive no idea whats going on, but at least its going in the right direction!

27-07-19, 04:22 PM	#14
maviczap Member Mega Poster Join Date: Mar 2007 Posts: 9,096	Re: Fuel tank breather blocked Make sure none have perished and allowing air in. Had a car that did this to me via a vacuum line __________________ We're riding out tonight to case the promised land Make everyday count RIP Reeder - Jolly Green Giant and comedy genius

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