Question:
If my serial # on the block starts with US it has a short needle and if it starts with TW its a long needle?

Is this true for both 5.5 and GX models 3,5,7, port?

If the long needle is better then I would include that and offer the other as on option.

My GO 5.5 3PT is kicking but in my Buggy.I swapped a GX carb on it when it started acting goofy and its been great since.I did notice the seals on the needles were flaking on the 5.5 carb. Is there another difference in the 5.5/gx carb?

Will the new gx rod fit the 5.5 engine and vice versa ?