Originally Posted by
Flanno
My rule of thumb for 3 needle carbs is don't touch the midrange at any time and just tune em like a 2 needle carb, the mid range isn't actually a needle but rather repositions the jet so the low needle is more tunable from low to mid and when the highend transitions.
All the guys I help out at the track also run OS and Ninja's wich are 3 needle and I tune em all like a GO anyway, except one that the mid had been moved (carby strip down and cleaned) I had to bring home and reset it and then retune from scratch.
If I get a GXII I'll probably be putting a MG carb on it anyway, I'll have to wait and see what they come up with first tho. and how it performs for me.
+1 Flanno. That's the key to the 3 needle's I believe. They are set in the factory and best left alone. The only one I ever owned I dot punched a reference mark adjacent to the adjusting screw and then never touched it, and it ran great like that for the life of the motor.
I guess they are going to the 3 needle style carb for better tunability and economy ? I have to say I find the 2 needle MG and GX carbs great.
I will definitely be trying one of the new motors (as you would expect being a dealer), so I will be very intersted to see how they compare to the MG, which is by far the best motor I have run so far.