CB750 No Plunger Hellride Freedom Machine

Re: CB750 No Plunger Hellride

I stripped the rest of the paint off the fender, ran the factory flat spot through the English wheel to match the fender profile and now I’m filling holes. When it’s done, only the round and oval hole above the square will remain.




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Re: CB750 No Plunger Hellride

Needs a little filler, but good’nuff.



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Re: CB750 No Plunger Hellride

Might not seem like much, but I added an inch to the fender struts and moved their angle to match the down tube in front of the seat. This changes the fender’s orientation so that it matches the wheel shape much more neatly. It makes for some nice filigree.




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Re: CB750 No Plunger Hellride

Much much better. I am a fan of matching the angle of either the downtube or the front forks.
 
Re: CB750 No Plunger Hellride

irk miller said:
Might not seem like much, but I added an inch to the fender struts and moved their angle to match the down tube in front of the seat. This changes the fender’s orientation so that it matches the wheel shape much more neatly. It makes for some nice filigree.
That looks a lot better, guard fits the wheel nicely now.
 
Re: CB750 No Plunger Hellride

Final post about the exhaust to finish up the tail pipe on the inlet...

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Re: CB750 No Plunger Hellride

Sweet child of mine... that looks cool. keep cuttin' and weldin'
 
Re: CB750 No Plunger Hellride

I took some time off from working on the Mid-Ohio haul to make the chain tensioner. I machined the drum and welded an old gear shift lever to it and a cap screw to the shift lever. I machined a bronze bushing to insert into the drum, then on the backside I machined a delrin bushing to fill around the bronze.

In all but the last pic, the arm is basically straight. In the completed unit, I bent an "S" into the lever which centers the skateboard wheel over the pivot and moves it clear of the frame.

In this pic are all the components minus the spacer to go behind the skateboard wheel that centers it to the chain.
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This is the backside of the tensioner, where the delrin surrounds the bronze.

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Here's the unit put together with the spring from a kickstart mechanism. One thing that changes on the spring from what you see in the pic, I spread the first coil out to help put more tension on the spring and to help it spring back a little better. That may not have been necessary, but it doesn't hurt either.

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Another view of the arm and pivot. Notice the drum isn't machined square, but instead has a curve to it. This helps the spring move toward the arm and keeps it from binding in front of the mechanism. It also gives it more throw, as the way the spring works the ID shrinks when the tensioner actuates. I didn't want the spring too loose, but too tight kept it from swinging very far and it would bind.

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This is the pic of the completed tensioner. The arm is bent, which moves the wheel back toward the center of the bike. The arm is also shorter than in the previous pics.

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Re: CB750 No Plunger Hellride

Man, that is slick.

Looks like you'll have this on the road b4 I get my lazy azz out and fix my carbs, and get mine running again.

Nice work Eric.
 
Re: CB750 No Plunger Hellride

Hey Irk, nice bike for sure, but what's the black coupe behind it?
 
Re: CB750 No Plunger Hellride

Brodie said:
Wall art.

Haha. For now it is, Brodie. Except it's more the wall than the art.

Pete12 said:
Hey Irk, nice bike for sure, but what's the black coupe behind it?

It's a 1970 Plymouth Roadrunner.
 
Re: CB750 No Plunger Hellride

A 21' long shelf? I have one of those but its a few feet shorter. ;D
 
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