A/f Screw Settings for Zuma 2T & Dellorto

[willie678]

Can someone please provide an answer,,,


Which direction is Lean or Rich on Stock Zuma 50 Carb?


Which direction is Lean or Rich on Dellorto PHBG Carb?


I though i remember they were opposite. The answer is not in a obvious location now that zumaforums is gone.

I know how to tune. I am just needing to know and have the reference...

Thanks

[pinkscoot]

It depends on which side of the carb it's on. The Dellorto is on the engine side so in is lean and out is rich. If it's on the air box side it's the opposite.

[Zino]

stock carb is a air screw since it is nearest the air filter .
turning the screw in cuts off air making it richer

[willie678]

Thanks!! Here are some great links on tuning i'll leave here

forums.kartpulse.com/t/what-i-ve-learned-about-carb-jetting/5916

www.snowmobileforum.com/threads/jetting-from-the-bottom-to-the-top.55800/

www.49ccscoot.com/faq/carbtune.html#needinfo

www.mopedarmy.com/wiki/How_To_Tune_PHBG_Carburetors

www.apriliaforum.com/forums/showthread.php?335689-Needle-Carb-Fuel-Mapper%99-PHBG-variant/page3