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Discussion Starter · #1 ·
How big a number increase would be equal to the next size jet for a carb?

And what would be the ranges be in rpm for pilot jet, needle, and main jet.

On the fuel table all the values start at 0, so if 0 is stock, for example a 45 pilot jet, what number would be a 48 or 50?

Then how many squares/rpm would you enter the same increased number?
 

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Discussion Starter · #2 ·
Really? nobody knows nothing?

common guys, 2014 yfz450r all stock with lid off to mount MSD tuner.

I need to know basic starting point for a good tune.

I copied the fuel map on the dead msd tune thread, but that gave me a flat dead spot in the low to mid range. It cuts out for a split second then runs perfect.

So I need to understand more how these tuners work and how much changing any number on the grid will affect the fuel delivery.
 
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