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1964 jubilee 150cc carburetta setting

Posted: Mon Jun 11, 2018 3:24 pm
by rickshaw
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?

Re: 1964 jubilee 150cc carburetta setting

Posted: Mon Jun 11, 2018 9:12 pm
by Nozem
Hi Dave,

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

Greetings,
Nozem rulez

Re: 1964 jubilee 150cc carburetta setting

Posted: Mon Jun 11, 2018 10:12 pm
by rickshaw
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.

Re: 1964 jubilee 150cc carburetta setting

Posted: Tue Jun 19, 2018 9:07 pm
by Nozem
Hi Dave,

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

Greetings,
Nozem rulez

Re: 1964 jubilee 150cc carburetta setting

Posted: Tue Jun 19, 2018 9:19 pm
by rickshaw
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.

Re: 1964 jubilee 150cc carburetta setting

Posted: Tue Jun 19, 2018 9:52 pm
by Nozem
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.