I I'm looking for a mikuni hsr48 carb. Some people tell me there was obliged to by pass the accl.pump cause that make ''bukk'' the quad when you put it full throttle that is true or just a bad setting? And I wanna know what are the best jetting for a temp about 20-27c and a altitude of 386 to 500 feet with the 48mm. Do someone have do this set-up?

Thank you

 

The accelerator pump rids you of the stumble upon stabbing the throttle. It compensates for for the slide sucking in all of that air with a squirt of fuel that you would not have otherwise.

I'll check some of my notes when I get home for the jetting sizes and post them up.

 

ok thank you maybe you will need to know that I use a UNI airfoam filter for Honda 250R...