The pics show my open 2003 ET4 carb, bottomless. I don't recognize the float valve hardware, and have read that the early ETs had Walbro(?) carbs.
The stock ET4 pilot is a #34, and is different from any jet in my collection- Keihin. Polini, OKO, Mikuni - shorter although similar to the PWK and CV jets from Keihin and clones. Wise Greasy125 suggested I need a 38.
Since the much longer #38 I had did physically fit, and the "business end" dimensions were very similar, I decided to try it out. Turns out it works considerably better than the stock 34 - smoother idle, not as many turns out on the mixture screw, less of a flat-spot on initial throttle application.
Still, I'd like to find the CORRECT #38 if possible. I'd appreciate any info on sources.
Thanks in advance for any advice.
This is the stock ET4 carb, bowl removed. The pilot has been removed. It sat recessed a few mm from flush with the tower.
Here's the approximate length of the stock 34 pilot.
Here's the PWK Keihin 38 Pilot jet I happened to have. It sits a mm or 2 proud of flush with the tower screwed in fully.