The GSX series has the 750E, which boasts unwavering popularity.
There are quite a few variants, so it’s a bit niche. I’m quietly fond of this engine.
When you convert it to a direct carburetor with vacuum, I’ve been thinking lately, “you really can’t underestimate it.”
Since the troublesome symptom comes and goes, let’s eliminate things one by one.
First, we’ll replace the ignition coil. 33410-31311 (90 mm pitch)
The standard options are 90 mm and 102 mm.
This GSX750E is 102 mm, but the original borrowed coil was 90 mm with a support bracket.
I thought installing the 102 mm would be the cleanest approach, so I started tapping away, and then…
“Discontinued!” came the announcement.
Well, 102 mm is pretty niche anyway, I thought, but I was sure it had to be available somewhere. After searching without success, I ended up ordering the 90 mm.
I could order the OEM cap, but… that “NGK logo” is irresistible for my generation, so I patrolled the NGK website and XD05F is what I decided to use.
The NGK website seems harder to navigate these days. Maybe it’s just me getting used to it…
The length is fine, but the angle is slightly different… (getting a bit worried)
It turned out okay, so we’re good!
I thought about making a new one, but… I figured why not and reused it.
(Polished)
The terminals looked a bit sketchy, so I cut them and made new ones. I’m in the camp that uses heat shrink tubing.
Threading the cap onto the plug wire is always a pain, isn’t it?
If you use something sharp like a scribe to poke a pilot hole in the center, it becomes super easy.
That’s how we finished the layout.
I also labeled the coils with P-TOUCH so they’re easy to identify.
I checked to make sure the centrifugal governor is working.
It’s good to occasionally verify that the spring is functioning.
But this spring seems like it should be a consumable item…
These days, the chances to use a timing light have dropped dramatically…
The batteries being D-cell is such a pain. I’m making do with an Eneloop converter and using it.
Just to be safe, I also checked the charging voltage.
Surprisingly, a DR7EA… I was in a hurry so I ordered from Yodobashi, and it arrived the same day. Amazing!
Incredible!
At this point, it seems to be running smoothly. We’re done.
