5 replies to this topic

[MikeyMex]

Quick question, where does the vacuum hose from the fuel pump get attached too?

 

I can't find a drawing of this anywhere, I had a fuel problem and I think this may have been incorrectly fitted before which is why I had a fuel/oil issue.  This is a photo of the yamaha sticker on the inside of my fuel tank.

 

Thank in advance

 

Mikey

Oh by the way I don't gotta fuel tap, somebody previously disregarded it and now gasoline goes direct from tank to pump to carb without being able to turn the gas off or switch to reserve.

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[Studley Ramrod]

It goes to a brass stub on the inlet of no.1 cylinder.

[thelodger]

Mikey

 

As the petrol tap has been removed I don't think you would need the vacuum pipe connected but the carb end ( the brass stub referred to above ) should be blanked off as well.

 

I hope I have this right !

[Studley Ramrod]

Err, yes, you would need the vac pipe connected as it provides vacuum for the mechanical fuel pump.

[mh1848]

as Studley says you need vacuum to pump - plus you need to ensure other vacuum stub is blanked off - but you also need to be able to connect to it to balance carbs - i have a length of hose attached to unused vacuum stub with a blanking plug so it is easier to connect to manometer

[MikeyMex]

Thanks guys,

 

I will put it where it's supposed to go now.  Yes there is another blanked off hose with I assumed was for balancing.

 

Gracias a todos.

 

Mike