Keihin carb mods

I’ve made some modifications to the Keihin carb that came on the Honda.  The Keihin is the same as the clone carbs, the fuel line needs to come in from the top.  And it is a smaller diameter than the other fuel lines I’m using. This is how I the fuel line had been run to the carb:

Replaced this:

With this 1/16 npt elbow that is pointed down:

With using the Club Car airbox, I don’t need the choke.  So I’ll plug that hole with a 1/8 npt fitting:

I sanded down the excess that was protruding into the carb:

Installing the $10 eBay adjustable main jet:

While I had the carb all apart, I enlarged the idle jet and opened up one of the 4 holes (furthest one back) that are part of the idle circuit.  Carb installed with 1/4 fuel line running directly to the carb:

I’ll be throwing away the smaller fuel line now.

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Riding in comfort now

Finally have a seatback on the cart now.

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Never had so much fun going to Walmart

After crappy weekend weather, today was a great day – sunny and in the mid 60’s.  I spent part of the drive to and from Walmart dialing in the Keihin carb.  That involved a lot of standing still and stomping on the gas pedal.  I think idle circuit modification has really helped the transition from idle to WOT throttle.  Even with the WOT runs, I still managed to get 32.7 MPG.


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Some work and some play

For the work, it was a warm day and I cut off most of the golf bag holder arms and then spray painted the cut ends.

I then spent some time aligning the front end.  I now have about 1/16″ toe in and the cart drives straight with the steering wheel perfectly level.

Now for the play.  This looks like a great place to do some 0-30mph times.

And of course there is an app for that.  I thought I had the jetting dialed in pretty well, but I’ve learned that jetting a 4 cycle is nothing like a 2 stroke dirt bike.  The first couple of runs all gave similar results as this:

I don’t know what prompted me to mess with the main jet, but I opened it up a little and my times dropped into the 10’s.   I kept opening up the main jet a little at a time and got my best run:

Another nice Fall day

I kept things under 20mph for mos of the drive and got 38 MPG.

I had to goto Walmart, Home Depot and then the Club Car shop. I stopped off and finally used one of the cup holders the way it was meant to be used:

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Finally – a shifter

I finally got around to getting the shifter set-up.  The first problem was the arm on the rear end was too long and hit the body.

That was easy enough to cut down.  I was able to use the bracket on the rear end, I just had to make some adjustments on it.

Then I had to add an extension on to the Yamaha shifter assembly to get the cable to work properly. I also took that as an opportunity to add a little bracket so I could mount the disc brake reservoir.  That was easier than welding a bracket to the frame.

I’m using the electric body, so I’ll need to make a cover plate later on.

I can finally install this cover.  I just need to get more body plugs.

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