It's fair to say the Zuk has been a pain to get running correctly. I've had blow fuel pumps, inconsistent RPMS, stalling....etc
Tonight committed a cardinal sin...I made multiple adjustments in one go!
I ran some carb cleaner through it.
Adjusted the float to spec at between 15 to 20 degrees, with 0.445in float depth. Float is moving freely. https://www.youtube.com/watch?v=g6y32Gw5HK4
Increased the vacuum port hole by drilling it to 1/8in. as per video https://www.youtube.com/watch?v=CXKUT9HeRnM
Sealed up the mounting surfaces with RTV
Sealed up the mounting surfaces with RTV
If I were to judge the results only by ear, I'd say that was a vast improvement. The engine no longer sounds lumpy like a Harley and the RPMs are much much smoother.
I have to check the mixture tomorrow as it was idling really nice when cold, so it's probably running rich now the vacuum port is moving the float 'better'.
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