LoL No I'm not patient.
So here's what I figured out. Yes they are pretty much the same but there are some key differences:
- The newer one (16100-HN6-A31) i
s not thinner, visually they look to be the same thickness, the stripped down late carb body actually weighs 12 grams more than earlier version.
- The earlier carb has "Keihin" cast into side, the later carb is cast "KYB" (Kayaba)
- Later carb has tamper proof idle screw that is covered by a brass plug. You'll need a motion pro 08-0242 socket to fit the d-shaped head on the idle screw. They are about $7 shipped on ebay. The early idle screw will work fine in the later carb, you'll need tne socket to remove the tamper proof idle screw.
- The late model fuel inlet has a small screen in it and fits 8mm (5/16) tubing vs the 6mm (1/4) on the earlier carb. I replaced the petcock with an aftermarket one that had the larger size since it appears that Stabil fuel stabilizer dissolved the screens in my stocker. Link here:
Slide is different design, but cutout is same. old and new interchange. Needles are different, use your old one.
Jetting of the carbs is completely different, like way leaner to keep the eco-nazis happy. Use your old jets, jet holder, pilot, needle, idle screw etc. Make sure your jets are clean before installing in new carb. Count idle screw turns in your old carb and set it the same in the new one. Fine tune once your quad is warmed up. If you forget this step, set to 1.5 turns out.
So overall, the swap was a success, my 05 runs absolutely perfect with the late carb and it was about $100 cheaper. Hope this helps anyone who needs an 01-05 carb, wants a factory "bolt-on" setup, and doesn't want to pay $230+ for the 01-05 carb. PM me if you have any questions about the swap. Good luck.