Water in the tank!

[vecie78]

Hi all,

I have been having problems with my Yamaha XJ S Diversion '00 when switching the petcock from normal to reserve petrol. The bike just started choking.

Now it is not working properly although there is lots of gas. I guessed some external elements were sitting in the bottom of the tank.

What I did was removing the tank and empting it completely.

Water.

Yes there was some transparent liquid and lots of it.

After refuelling the tank with clean petrol, The bike is not working neither. It starts but does not respond well at all.

Actually there is an electric noise (kind of buzz) when it starts (sometimes) and when I switch off (some other times); the volume is fairly high and which I have never heard before.

My question is, could have the fuel pump suffered some sort of damages?

Tomorrow I am going to remove the tank again and this time empty/check the bowls of the carbs. I will not go too farther with this job since I cannot sync the carbs afterwards.

Perhaps I could do without removing the carbs and just drain the bowls by unscrewing the drain plug? You reckon?

I think I can do this work I will try my best before considering taking my dear to a mechanic; I am not an expert but somehow knowledgeable and stubborn....fingers crossed

[monkeybiker]

I had this on an old cbr. The breather tube was cracked somewhere in the tank. If I filled the tank to the top it would dump fuel. It would also let water in the tank through the breather hole.

You do need to empty the carbs. I would drain the carbs first and then go from there.

[Howling TerrorOutOfOffice]

Until a grownup pops in this thread and helps I'll offer my novice advice.

Wouldn't fiddle with the carbs, just run fresh fuel through them. Bound to be water in the bottom.
I'd whip the plugs out and give them a once over. Would be a surprise to me if a little water knackers something that moves liquid. Is there a fuel filter and have you changed it? It may be restricting the flow and making the pump work hard.
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[vecie78]

yes there is also a fuel filter before the pump

[Howling TerrorOutOfOffice]

They cost about a fiver, I'd change it then see if the pump is quieter.
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Diabolical homemade music Bandcamp and Soundcloud
Singer songwriter, Artist and allround good bloke Listen to Andrew Susan Johnston here
The Harry Turner Project

[Taught2BCauti...]

Water can damage a petrol filter, and can also block very small jets in a carb - especially if it has caused particles of rust from the tank to reach the carbs.

Isopropyl Alcohol can be used to get rid of small amounts of water in the fuel - google for the correct procedure.
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[cb1rocket]

empty tank, drain carb and refill with fresh petrol. easy method
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[Pete.]

[bikenut]

does your bike have a flush fitting petrol cap?? with a drain tube running thru the tank and then out at the bottom, to drain the water away from the flush fitting cap recess??

see cmsnl for exploded views and filters. pumps etc.......

if theres water in the tank then rust will happen, and everything down stream of the petrol tap will be contaminated.........even going thru the tank filter......

res tap position usually allows any crap in the tank bottom to "go down stream".........

float bowls off and see crap in the bottom of them.............etc

buzzing noise?? does this bike ( carbs and res tap position ) have an electric fuel pump?

or is it something else like a relay??

remember when cleaning fuel system, start at the petrol cap.......
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