/Carb question??

[Ahmed AN9]

Does it worth to change 38's with 140/75 jets to 44's for a 771cc engine??

 

[Tyler Zane]

You will see performance gains going from 38's to 44's.

 

[Ahmed AN9]

What if I want to keep using the 38's ?? Do I have to add a second pulse nipple?? and How it is going to work as long there is only one pump in the rear carb??

 

[Vortex]

Dual 44s typically had pumps on each carb. If you don't want to add the second pulse fitting you could purchase block off plates and add an external high volume mikuni fuel pump. Has dual outlets. You will have to make a bracket to position it properly. I have run both dual pumps and the single high volume external pump.on large carbs and they both work well.

If you wanted to keep 38s, a lot of riders recommend removing the chokes for added airflow. Could also have them taper bored.