Originally Posted by Rich Browne

Hi mrx,

The RB Speedline Xenon line comes equiped with three needle carbs. A three needle is more flexible, for tuning, than a two needle design. Being more flexible has an up and down side. Up side - superior tuning ability - great mid range control in addition to the "standard" bottom and top end tuning. Down side - less experienced tuner may get a little confused. They (the less experienced) would be better off not touching the "rear" needle. I'm sure the instructions will be clear - plus, the RB site is loaded with "help" reference material.



On a side note - my personal favorite carb was the Picco Torque. They were great carbs once you mastered them. By far the most difficult to master - but, once you did, they were "bottom-end" monsters.