First Generation Ascots > The Thumper Years: Stock To Lightly Modified

Fuel problems

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Iainhugh:
I've recently done the jets on my ft. Then It was leaking fuel so I replaced the float valve and now when I switch bike off, if  the petrol tap on it leaks fuel from overflow after a few minutes. I have already done away with the original vacuumed petrol tap. Any ideas ?? It's get mot'd in the morning. As long I turn it off its all good but I'll forget
Iain
Scottish highlands

J6G1Z:
Is it possible that the float is stuck & not closing the needle valve?

J.

Iainhugh:
I've no idea. It was leaking first time round even when the bike was running. I then changed the needle valve and it leaks few mins after  I kill the engine . If the float was stuck surely it wouldn't run?? There was a diafram in the carb separate casing and near float bowl ,,when I was cleaning it all out.  Is this anything to do with shutting fuel off in the carb
Iain
Scottish highlands

thumb:
Is the needle valve sat between the 2 plastic pins on the float, had a similar problem when I cleaned the carb and did the jets on mine

Iainhugh:
The only thing I can do is take the carb back off for another look , although when I put in the new needle valve it did overflow so I've already had the carb off to look inside again. What is the story with the diafram. If you look at bottom of carb it's in a all casing next to float bowl. It's about 15 -20 mm in size with 3 small screws holding it in place. The diafram has a plunger / pin kinda thing on the top going up into carb and a spring on the bottom side of it. When I cleaned out carb it didn't look too healthy in there.  But for now I'm just gonna have to switch off fuel straight away,
Iain
Scottish highlands

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