Amal MK2 Single Carb on a 850 need specs

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Needle Jet 106 (107 was too lean, motor pops up)

Hi, maybe you made a typo since 107 is larger than 106, 105 being too lean seems more likely! (or 107 being too rich?)

106 seems most likely choice anyway.
 
Hi, maybe you made a typo since 107 is larger than 106, 105 being too lean seems more likely! (or 107 being too rich?)

106 seems most likely choice anyway.
Yes, Steve. Strange; by opening the Chocke a bit the Motor was running better.
This gave me the assumption that it was too lean.
But you are right, it means in total it was too lean, not only dedicated to the Needle jet
bad setup:
107 Needle Jet / 280 Main Jet / Air jet 15 / 3 Side / Old Needle 2A1 / needle position 2 grooves -->Motor POPS does not run propper, by open a bit the Choke the Motor works better, but not satisfied!
My Setup:
106 NeedleJet / 300 Main Jet /Air Jet 20 / 3.5 Slide, NEW Needle 2A1/ needle position 2 grooves from the tip (longest part of Needle),
Since this time a :) at my face
 
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