Paugho frame for 45"

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nanonevol
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Re: Paugho frame for 45"

#16

Post by nanonevol »

kitabel wrote: Thu Feb 04, 2021 4:09 pm I'm more confused than ever
About what?
The only transmission that has the correct width between the primary and drive chains for your frame and engine is the 1936-64 BT 4-speed.
About what? Conflicting information from sources.
OK, so I stick with '36-'64. I thought that the short mainshaft would interchange and solve the alignment problem. No?
I can certainly get one. Anyone?
Looking ahead, I'm going to have to also find and install foot clutch and shifter parts.
Tempting to go British as they are cheaper for one thing and I'm more familiar with them especially the simple foot shifter and hand clutch lever.
But, no, I'm up for this. No, no body said it would be simple, that's fine.
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Re: Paugho frame for 45"

#17

Post by RUBONE »

nanonevol wrote: Thu Feb 04, 2021 8:21 pm
kitabel wrote: Thu Feb 04, 2021 4:09 pm I'm more confused than ever
About what?
The only transmission that has the correct width between the primary and drive chains for your frame and engine is the 1936-64 BT 4-speed.
About what? Conflicting information from sources.
OK, so I stick with '36-'64. I thought that the short mainshaft would interchange and solve the alignment problem. No?
I can certainly get one. Anyone?
Looking ahead, I'm going to have to also find and install foot clutch and shifter parts.
Tempting to go British as they are cheaper for one thing and I'm more familiar with them especially the simple foot shifter and hand clutch lever.
But, no, I'm up for this. No, no body said it would be simple, that's fine.
A short mainshaft will fit any 4 speed box and allow your spacing to be the same as a 36-64 box. No need to be moving mounting around. Paughco builds those frames with the engine mounting already offset, so no issues there either, so therefore any standard width rear wheel fits, the most commonly used is a double flange steel hub as used in the '70s and lines right up to the gearbox.
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Re: Paugho frame for 45"

#18

Post by RooDog »

Put a Sportster top end on for a light weight hot rod....
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kitabel
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Re: Paugho frame for 45"

#19

Post by kitabel »

I give up
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Re: Paugho frame for 45"

#20

Post by RooDog »

https://paughcoparts.com/products/paugh ... gid-frames

From their web site.....
PAUGHCO MAGNUM MOTOR 45 RIGID FRAMESNow available exclusively from Paughco, these frames were specially-designed to work with the legendary Magnum Motors first built in the late 60’s. These motors feature a 45" lower end with a 900cc Sportster top end, and they not only looked cool, but they ran as good as they looked. Paughco’s new Magnum Motor frames have all the same features of our standard 45" frames with single front downtube styling, and the ability to use a 1941-1969 4-speed Big Twin transmission. All of the available accessories for our ‘Project 45’ frames (except the exhaust systems – call for more information) will work with both frames. Available in all the popular rakes and stretches.
nanonevol
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Re: Paugho frame for 45"

#21

Post by nanonevol »

kitabel wrote: Wed Feb 03, 2021 9:17 pm A 45 suffers more than a BT from insufficient "crawl ratio" (1st gear X final drive ratio = 10:1). I'd like to see 11:1 due to lack of both torque and flywheel inertia.
The stock 45 transmission's 2.47:1 needs at least 4.45:1 drive for this, equivalent to a 31 tooth engine sprocket.
With the BT transmission's 3.00:1 1st gear, drives as tall as 3.66:1 will work acceptably in traffic without killing the clutch.
This ratio allows a hot 45 (big carburetor, open exhaust, big intake valves and cams, relieved, .100" head mill, more breather timing, tight quench, but stock lower end) to reach almost 100 mph at 4,700 RPM.
If I follow what you're saying here, this would require a larger than stock Solo (41) rear sprocket on the tire.
With the (51) I have and Paugho's (22) engine sproket I would be somewhere near your suggested gearing with a BT trans, no?
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Re: Paugho frame for 45"

#22

Post by nanonevol »

I guess I'm on my own with this forum. I'll report back if I find any salient info.
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Re: Paugho frame for 45"

#23

Post by kitabel »

What happened to "I'll do my homework on the gearing"?
After all the advice you got from everyone, you're "on your own"?
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Re: Paugho frame for 45"

#24

Post by RooDog »

nanonevol....
You seem to be a new guy to the world of Harleys, no?

How did you come by that mongrel frame? Was it some one else's castoff, buy it new, or what?

It is not an easy, nor inexpensive venture to dive into without extensive knowledge of what fits what with vintage Harleys.
Really, you've got to know your $hit to make this happen, and even then, the results may be less than satisfying.
So please tell us your end goal, or dream, for this machine, and perhaps your age, and the fellas you hope to ride with and or impress with this creation.....

It's all good, but without an end game we are all lost in a fog of possibilities.....
Been there too.....RooDog....
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Re: Paugho frame for 45"

#25

Post by nanonevol »

kitabel wrote: Tue Feb 09, 2021 8:01 pm What happened to "I'll do my homework on the gearing"?
After all the advice you got from everyone, you're "on your own"?
I did decipher what you wrote, mostly. Very helpful. But I still have questions.
Seemed like the help when done when you said you give up and I didn't get a reply to my last one. Maybe you're just busy.
It will be a lot harder to do this without the experienced help I get here. But either way I will do it.
RooDog
Yes, new to Harleys at 62. Got interested in bikes maybe 6 years ago and rebuilt a Triumph Choppa and stock BSA Lighting.
Also fixed up a little Italian Indian for the woods and have another custom Triumph in the works.
I bought this 45" as a "basket case" you could say. Lots of good parts. Just want to built a reliable and funky little flatty
and try out some performance mods, keep it light and maybe it will surprise people.
Sure i'll run into problems. That the challange and the fun. Lots to learn.
It will get done, I'm sure of that.

No particular hurry on the transmission. I have a '65 case with cut off "ears", that should work with the aftermarket adjuster.
Paugho says on their site that they work up to '69 so I would hope they would know although I still wonder whats wrong with
later ones up to '76, say with the shorter mainshaft. But I'm a Newb so what would I know.
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Re: Paugho frame for 45"

#26

Post by RooDog »

nanonevol
If all you have is the '69 tranny case then you can use the shortest mainshaft from a Panhead to get the right primary alignment, and all the other gears from up to about 1977 model will mix and match for your build. Everything else is going to be fun, you can even use a Limy or Asian front end on this puppy. Anything can be made to fit with an adapter....
Best wishes....RooDog....
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Re: Paugho frame for 45"

#27

Post by Andygears »

Couple notes, the two adjustable trans bases. The upper one uses Allen set screws to pull the trans back, while nice and neat/clean in theory, the screws are small thread and don’t give much leverage to pull the trans back. I use the lower one, it works fine and really doesn’t make the trans any wider. And the later trans with ears must have set screws or bolts in the front two holes because they go thru into the trans oil and an O-ring on the countershaft because there is no cap.

Andygears
nanonevol
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Re: Paugho frame for 45"

#28

Post by nanonevol »

Would prefer a springer but got a Buell fork in the deal.
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Re: Paugho frame for 45"

#29

Post by RooDog »

Do you know anything about springer forks?
Best go with the Buell, it will perform better, make people wonder WTF?, and there is always "use what y' got" it will save you money, and good brakes is always a good idea.....
....RooDog....
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Re: Paugho frame for 45"

#30

Post by RooDog »

PS: Any modifications to install any fork should only be done to the fork itself, DO NOT modify the frame to install any fork. It is unwise to mess with the frame.....
....RooDog....
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