TW200 Jetting for Houston area

In case anyone in the Houston/SE texas area is trying to dial in their TW carb, I wanted to pass along what works on my bike.



2003 TW200- stock exhaust, stock cam



Pilot Jet= Stock



Pilot screw= A hair over 2.5 turns out



Main jet= 130



Needle Shimmed .035



I had a slight lean surge after replacing my stock header pipe with a new one (it had no carbon buildup in it like the old one did). Shimming the needle .035 completely smoothed out throttle response when cruising. I used 2.5mm washers that I picked up from my local Ace hardware. I sanded them down to the thickness I needed.



The stock 126 main jet was lean, especially after replacing the header.



The 128 main was pretty close, and the 130 might be a tiny bit rich, but not "blubbering/poor throttle response" rich.

I think if there was a 129 main it would closer to perfect. I'm not confident I could bore out a jet without ruining it so the 130 is fine. I'd rather be a tad rich than a tad lean, especially in the summer heat here.