Here's a couple of mods that I've done to my Rickshaw, that I'd like to share.
First, is the retaining pin, that allows for the motor to be retained in the mount. But, also allows for quick removal and stowage.
I used a square and scribed a line straight down the face of the mount. The line followed the edge of the bore that the yoke shaft rides in.
Then, I drilled a hole centered on the line, and reamed it to 1/4". Half the hole diameter bisected the bore for the yoke.
Then, I inserted the yoke in the mount, and using the drilled hole as a guide, milled the groove into the shaft. Alternating from each end of the hole, and once passing through, rotating the motor in 90 deg turns, until I could rotate a full 360 degrees, with the drill bit turning in the hole.
Next, is a mod that I did to avoid the exhaust. Both the noise, and the gasses.
The GX35 motor used on the Rickshaw, is made for a weedeater. It's a horizontal shaft application, so it blows the exhaust out what is normally the back. But, when used as a longtail, it blows it right at you.
It's hard to get away from it when sitting down. Especially with a tail-wind!
Well, Honda also makes a GX35 motor for vertical shaft applications. IE, tillers.
That GX35 motor has a suffix of NT-T3.
It's gas tank, muffler, and shroud are different.
I ordered and installed the muffler and shroud on my Rickshaw. They are a part-for-part, bolt on swap.
The P/N for the muffler is: 18310-Z3F-820.
The P/N for the shroud is: 19720-Z3F-800ZA.