Zed thou st 1981 original bike

[mark d]

Anyone on here had a tapping noise coming from there tank ? I’ve lifted the tank up of the frame and it still does it , even with the wires unplugged it does it too it’s not doing any harm just a bit irritating ,I got rid of my first st in 1990 because of this reason as then I thought it was coming from the engine could it be that it needs a new sender or an adjustment hammer tool ? I’ve not taken anything apart yet as I thought I would ask on here first

[Gus]

I take it this is with the engine running.

Does it stop if you open the filler cap?

Struggling to let air in the breather hole.

Gus

[mark d]

Yes with the engine running and tried with the filler cap open and with a full tank off fuel. it’s a uk bike , been in my family from new . I’m going to try it with two long lengths of rubber tube with the tank on the bench tmrw to eliminate any engine taps travelling up the fuel and vacuum pipe

[moizeau]

Does it do it on 'prime', not talking about Amazon.

[mark d]

Yes still does it on prime, took tank off this morning and put it on the bench and connected up the vacuum and petrol pipe and it still does it , took sender unit out as I thought it could be the sender arm touching the side of the tank as it’s really close so I bent it slightly away from the side and that didn’t work

[z1bman]

put the fuel tap on prime & disconnect the vacuum pipe

[mark d]

Yes took off the vacuum pipe and it stopped tapping ! Any ideas to a solution ?

[z1bman]

worn O ring weak or missing spring on the diaphragm

[mark d]

Do you mean on the petrol tap ? As I’ve ordered a new complete Kawasaki petrol tap from z power today