dank,
Where are you located and what is your altitude?
Do you actually have the LTR kit or needle? I ask this because LTR is no longer selling kits.
What I would suggest you do first is get a #7 slide, the '03s came with a #6. Of all my GGs the '03 was the biggest PIA to jet right initially and it was the only bike with a #6 slide. I swapped a #7 and it was much better.
Search this forum, there is a lot of info on the kit including mine from my '03 EC250. If you do not have an LTR kit, and want a quick solution, the JD Jetting kit (generic kit for PWK38AS carb) works excellent in the 250s. Other than that, get a DDK, DEK, and CCK needle and assorted brass and go play.
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