47UL update

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Frankenstein
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47UL update

#1

Post by Frankenstein »

If any of you are interested, just added some more pics
DD
https://linnmotorcycles.com/blog/2020/4 ... st-edition



1950Panhead
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Re: 47UL update

#2

Post by 1950Panhead »

Image

RooDog
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Re: 47UL update

#3

Post by RooDog »

Nice Stuff....
....RooDog....

big-louiesan
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Re: 47UL update

#4

Post by big-louiesan »

Really interested in the intake nipples, the photo with the two side valves next to each other - is great.

V/r big louie

Buddhahoodvatoloco
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Re: 47UL update

#5

Post by Buddhahoodvatoloco »

Very, very impressive. :roll: :roll: :wink:
Frankenstein wrote:
Tue Apr 21, 2020 3:16 pm
If any of you are interested, just added some more pics
DD
https://linnmotorcycles.com/blog/2020/4 ... st-edition

Frankenstein
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Re: 47UL update

#6

Post by Frankenstein »

thanks for the responses guys! I figured I'd one here that would appreciate the "double trouble" photo. Just had to capture that moment, never likely to happen again. Thanks for putting it up Panhead
The Jugs on the '47UL (left) were done up by Paul Freibus about 4 years ago? Anyway, back when he was doing good work, it just took a long time. He's close enough, (100 mi) that I drove down to order and pick up. On the nipples he machined the jugs and the large nipples so that there was enough meat left on both that he had something to braze to. He then blended in the port so it's very nicely smoothed out. And the manifold goes on with no more trouble than a stocker, So alignment is very good.
The 47 engine is in the frame now, working out the Vtwin exhaust to fit. Always a challenge :D
Dick

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Re: 47UL update

#7

Post by Buddhahoodvatoloco »

""The 47 engine is in the frame now, working out the Vtwin exhaust to fit. Always a challenge ...""" You dont say/write :lol: :lol: :lol: :lol: :lol:

Frankenstein
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Re: 47UL update

#8

Post by Frankenstein »

time to update on the '47, added a couple of posts to the blog if any are interested.
https://linnmotorcycles.com/blog/2020/5 ... 9th-update

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Re: 47UL update

#9

Post by Pascal »

Very very nice!
You just gotta love these Flatheads..

Although I'm more of a 45' guy, I would love to own and ride(!) a '74 SV.
They are scarse on my side of the Atlantic

Frankenstein
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Re: 47UL update

#10

Post by Frankenstein »

THE 47 IS DONE!!!!
Made the maiden voyage this afternoon, all went well. Had a couple of problems to work out, but all is well. Starts, stops, and runs nice.
https://linnmotorcycles.com/blog/2020/5 ... 47-is-done
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47rt_side.jpg
47rt_side.jpg (230.96 KiB) Viewed 118 times

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Re: 47UL update

#11

Post by George Greer »

Damn, thats purdy!!

George

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Re: 47UL update

#12

Post by RooDog »

DD....
That BIG Aluminum Flattie looks so MASSIVE, I love it.
Now, I may have missed the details, so could you refresh us? Bore, Stroke, and mechanical compression? What sort of cams and carburation are you using, also? Inquiring minds would like to know......
I love it when a plan comes together.....
....RooDog....

Frankenstein
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Re: 47UL update

#13

Post by Frankenstein »

So, details, details. You have to remember I built this engine with this'n that. The top end is what I removed from my personal 88" Flatty when I got the Aluminum jugs. Cylinders are ported and relieved, K nipples brazed to the jugs, big manifold, with 38mm VM Mikuni. Bought new Torque monsters for the build, 4 1/2" to bring it out to 84 inch. The compression is roughly stock. The cams are stock as well, what I pulled from my personal 88 when I installed my hot cams from Paul F. Has HD sporty auto advance with advance limited for flatty use.
It's easy to start, one or two kicks, compression's not too stiff which helps old legs for starting. And pulls like a John Deere. Close ratio first and third, and the clutch is really sweet, nice smooth engagement, suicide of course, with a hand banger lid, no sissy ratchet stuff on this bike :D
12 volt, of course, and a 65A, 'cause I've got a filing cabinet full of 'em.
American made frame, small operation here in the Northeast, it's a copy of a '54 straight leg with all the details right. Springer is from Mid USA, a copy of the HD, 2" over. Very close copy, passes the 4 ft test. (looks original from 4 ft away) Front brake is the HD 4 piston floating caliper, 'cause in these times you need the best brakes you can get to protect yourself from all the idiots out there. and on and on. More pics on the web page.
DD

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Re: 47UL update

#14

Post by RooDog »

3/4 Shovel, or 5/8 Evo master cylinder?
I made the change to the 5/8, with J-Brake 4 piston, 11.5 disc, and it was way better than the 3/4 SH MC....
....RooDog....

Frankenstein
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Re: 47UL update

#15

Post by Frankenstein »

So, having posted the picture of the matching motors, here's the matching bikes.
The new one's up front. I got lazy choosing paint schemes, if you hadn't noticed. I painted my 88 back in 1980, reshot the clear on it about 5 years ago. My wife and I courted on that bike, and she won't let me repaint it :D
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2ofakind.jpg
2ofakind.jpg (187.52 KiB) Viewed 70 times

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