196cc Clone: Fuel Delivery Questions

[Ken]

Currently converting my kart to a seat mounted tank. I'm in the process of sealing the old 5-quart Chilton tank, but that will necessitate the addition of a fuel pump. Hence my questions.

1) PUMP: I will be adding a top plate, either ARC or equal, but not sure which pump to use, Mikuni or Walbro. Any comments?

2) PULSE: From where should I get the necessary pulse? ARC sells a replacement valve cover already tapped with a pulse fitting, but I've seen videos where a pulse fitting was inserted into the crankcase where the governor arm used to be. Which is preferable?

3) JETTING: Adding an open filter and wienie pipe means I need to rejet the carb. It's running lean. I'm going to enlarge the idle jet to .018 but not sure about the main. Some folks swear by the 140 e-tube with stock jet. Others, like ARC, say a stock e-tube with a larger jet. And still others say use both. I'll probably just experiment, but again, I'd love to hear comments.

 

[Ken]

No response to my questions so I’ll give it a bump. The valve cover is a 5-bolt type so none of the pre-drilled covers will fit. Besides the cover is quite shallow so I doubt a pulse fitting with 1/4 NPT will fit. Should I tap and use the governor lever hole or what?

 

[leesiel]

For what it's worth my duromax 196cc didn't like the 140 e tube with any size jet and I never did get it to run good on the pulse pump; it always pumped too much and I just ended up going back to gravity fed(rigged up a tank ).

 

[bob58o]

Something like this for a pulse pump would work well.
https://affordablegokarts.com/products/carb-insulator-w-vacuum-take-off-gx160-200

And Many people need to add a T to the outlet line of the pump. One leg to the carb. The other leg going back to the fuel tank as a return line. The pressure from the fuel pump is often too much for these gravity fed carb set ups. The return like keeps pressure in check.

 

[Ken]

I inquired about the carb insulator with a vac connection mentioned above. Found out Affordable Go Karts is located in Santa Barbara, California and they have suffered from the recent natural disasters that befell that area. Here's wishing AGK, and their employees, all the best and a speedy recovery.