1964 jubilee 150cc carburetta setting

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rickshaw
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1964 jubilee 150cc carburetta setting

Post by rickshaw » Mon Jun 11, 2018 3:24 pm

Help I am a new member and have purchased a 1964 150cc guibileo but I cannot get it to run on idle can any one help with carb settings as I have run out of ideas.
Many Thanks Dave.
My last Gilera was in 1961 a 175 sport which I bent on a ford consul?

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Nozem
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Re: 1964 jubilee 150cc carburetta setting

Post by Nozem » Mon Jun 11, 2018 9:12 pm

Hi Dave,

Welcome here! What carb are you running on your 150 Giubileo? A Dell'Orto ME18BS or a UB20BS?

Greetings,
Nozem rulez

rickshaw
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Re: 1964 jubilee 150cc carburetta setting

Post by rickshaw » Mon Jun 11, 2018 10:12 pm

Thanks Nozem for the reply, the carb is a UB20BS I am not sure of needle setting or mixture. I have cleaned out tank all pipes were blocked and carb soaked and cleaned with cellulose thinners!!
Thanks Dave.

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Nozem
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Re: 1964 jubilee 150cc carburetta setting

Post by Nozem » Tue Jun 19, 2018 9:07 pm

Hi Dave,

I hope this will help you finding the right settings for your UB20BS.

Greetings,
Nozem rulez
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rickshaw
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Re: 1964 jubilee 150cc carburetta setting

Post by rickshaw » Tue Jun 19, 2018 9:19 pm

Thanks Nozem for the diagram its really strange the idle jet is about 12mm above the main jet so it seems starved of fuel, lifting the level in the float chamber seems to solve the problem.
Thanks again Dave.

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Nozem
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Re: 1964 jubilee 150cc carburetta setting

Post by Nozem » Tue Jun 19, 2018 9:52 pm

Just checking, what is the weight of your float? The lighter giubileo models have a 4.2 grams float, the heavier ones should have a 6.5 grams float.

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