ORIGINAL: opjose

Yup sounds like it's lean on the high end.

Hmm I find that the Evo .46 produces MORE power than the GMS .40 ( I have both, not that the .40 is a wimpy engine ). Something may be amiss.


The Evo needles tend to "walk" when the engine heats up.

It's worthwhile to remove the pins -AND- the blue collars, and then pull out the clips, tighten them down and re-install...

Why remove the collars and not just the pins?

The collars have a grub screw that holds the collar to the needle. These get overtightened at the factory to the point that the metal of the needle is deformed enough to tightly bind the collar to the needle even when the grub screw is removed.

That means that the blue collar will continue to act as a limiter of sorts, preventing you from moving the needle IN ( leaner ) any more than it was originally set to at the factory... even with the grub screw removed! ugh.... found this out the hard way.