Since I am waiting on parts for the EL project... it's back to the Magneto drive for this weekend. Got most of the control parts in from Competition Distributing. And my magneto arrived back from Mark's Magneto Service in Ct. Lovely!
First order of the day was to fit the magneto to the casting. This required elongating the mounting holes slightly, but only about .020" had to be removed. Easily accomplished with files. The magneto was then lined up and the gear mesh was confirmed. I also removed about .020" from one side of the shaft input hole in the casting. It cleared, but only just. Again, filed the material away in just minutes.
With the magneto mocked in place, it became time to deal with the carb and manifolds.
The replica Schebler that is on the bike is probably the root of most of the poor running. Despite all my tinkering, I can't get it working right. So, instead, I am putting on an M16 Linkert. The problem with the linkert is that, dimensionally, it won't fit in the space allocated -- especially with a Magneto. The bowl will hit the mag and the intake end of the Linkert will hit the fuel filter/outlet fitting.
Here's the solution.
aaaa 2 intake.jpg
The answer, fit a custom intake manifold that has a slight offset -- in other words, rotate the carb about 20 degrees away from the Mag so that it angles out from under the tank.
aaaa 1 intake.jpg
Here is the intake that I will be modifying. It used to be for, I think, a Servicar. I cut off the split and trued it on a faceplate. Then, holding it on the intake port, I could figure out the angle.
aaaa 3 intake.jpg
Intake set up in a rotary vice on the mill. Cut the shank off to shorten it at the correct angle.
aaaa 4 intake.jpg
After checking the fit and the angle, reset in the table and use a boring bar to open up the port in the intake manifold for a new threaded coupler that will screw into the intake port. The boring head lets me open it up to about 1.1" at a 20 degree angle.
aaaa 5 intake.jpg
This is the coupler fitted tightly in the intake manifold flange. This will be silver-soldered into place after final fitting. But first, it has to be threaded.
More in a moment.
First order of the day was to fit the magneto to the casting. This required elongating the mounting holes slightly, but only about .020" had to be removed. Easily accomplished with files. The magneto was then lined up and the gear mesh was confirmed. I also removed about .020" from one side of the shaft input hole in the casting. It cleared, but only just. Again, filed the material away in just minutes.
With the magneto mocked in place, it became time to deal with the carb and manifolds.
The replica Schebler that is on the bike is probably the root of most of the poor running. Despite all my tinkering, I can't get it working right. So, instead, I am putting on an M16 Linkert. The problem with the linkert is that, dimensionally, it won't fit in the space allocated -- especially with a Magneto. The bowl will hit the mag and the intake end of the Linkert will hit the fuel filter/outlet fitting.
Here's the solution.
aaaa 2 intake.jpg
The answer, fit a custom intake manifold that has a slight offset -- in other words, rotate the carb about 20 degrees away from the Mag so that it angles out from under the tank.
aaaa 1 intake.jpg
Here is the intake that I will be modifying. It used to be for, I think, a Servicar. I cut off the split and trued it on a faceplate. Then, holding it on the intake port, I could figure out the angle.
aaaa 3 intake.jpg
Intake set up in a rotary vice on the mill. Cut the shank off to shorten it at the correct angle.
aaaa 4 intake.jpg
After checking the fit and the angle, reset in the table and use a boring bar to open up the port in the intake manifold for a new threaded coupler that will screw into the intake port. The boring head lets me open it up to about 1.1" at a 20 degree angle.
aaaa 5 intake.jpg
This is the coupler fitted tightly in the intake manifold flange. This will be silver-soldered into place after final fitting. But first, it has to be threaded.
More in a moment.
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