Custom/Hybrid SBN 46's on a bored and ported 701

[clouse22]

Going to me running sbn 46's on my motor this year in a superfreak. The motor has been bored 84mm and has the cases and cylinder ported. I believe a 754cc Currently I am going to be running stock electronics, but I will be switching to total loss in the summer.

Right now, I have an ADA head with 760 domes (approx 180 compression), bpipe mod chamber, solas 144 pump with 9/15 hooker prop.

I went through the carb database and found settings from a xscream 771.

so currently the carbs are jetted

112.5 High with 5/8 turn out
117.5 Low with 1 7/8 turn out
2.3 N/S with 65 gram spring


Just wondering if this is a good starting point or not?

Thanks for the help

 

[kevbo]

Going to me running sbn 46's on my motor this year in a superfreak. The motor has been bored 84mm and has the cases and cylinder ported. I believe a 754cc Currently I am going to be running stock electronics, but I will be switching to total loss in the summer.

Right now, I have an ADA head with 760 domes (approx 180 compression), bpipe mod chamber, solas 144 pump with 9/15 hooker prop.

I went through the carb database and found settings from a xscream 771.

so currently the carbs are jetted

112.5 High with 5/8 turn out
117.5 Low with 1 7/8 turn out
2.3 N/S with 65 gram spring


Just wondering if this is a good starting point or not?

Thanks for the help

My wild assed guess is that your bottom screws are too rich, pilots too lean and the main/top screws way too lean. Go ride it, listen to the exhaust at 1/4 throttle for the pilots and power tune the top screws.

 

[Nuklear6]

Clouse,
Those specs for the x scream 771 are for there mood 46s which have some changes to the low speed circuit in the carb. Those specs are prob not the best starting spot for off the shelf 46s.