1950 EL Motor ??

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panz4ever
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1950 EL Motor ??

#1

Post by panz4ever »

I have my niece's chopped 50 in my garage for a refurbish (for lack of a better word). Original build was 40 something years ago. When done the cases were converted to use 56-60 FL flywheels, along with 58-72 pinion shaft and 58-64 motor sprocket shaft.

The cylinders are 61ci set up with stroker plates (I assume to accommodate the 74 bottom end?).

Since I have it all apart I figure now is a good time replace the 61ci top and to add 74 Panhead cylinders and pistons.

Any reason not to convert this over? Anything that I have to check or change? Seems like a straight up conversion
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Re: 1950 EL Motor ??

#2

Post by RooDog »

How did we fit Timken bearings in roller bearing cases?
RUBONE
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Re: 1950 EL Motor ??

#3

Post by RUBONE »

Sounds more like '50 numbers stamped in later cases, converting an early engine would be extremely difficult and costly, even 40 years ago.
As for the conversion it is dead simple , just change the cylinders with appropriate pistons and it is done. Are the 61 cylinders bored to 74 already? Why the need to change?
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Re: 1950 EL Motor ??

#4

Post by panz4ever »

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panz4ever
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Re: 1950 EL Motor ??

#5

Post by panz4ever »

Few more pics...flywheels and shafts

Motor sprocket side

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Pinion shaft side

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left side has a spacer and seal (that I figured out is a 69 part number)

Pic of the bike upon arrival. Sat basically unprotected & not ridden for at least 10 years in Florida. Bike originallly belonged to her dad. He let it go to $hit when he got angry at the world including his wife (my sister), his daughter and grandson. I did a refresh on it 23 years ago but never paid attention to what had been done to the bike. Top end as far as motor, went thru tranny, front end, new rubber, some new chrome parts (California coast was not nice to the bike), tune up, fluids, brakes, new chrome spokes (rims were in good shape), the usual suspects. But when it left back then it looked pretty damn nice, shiny and clean as a hound's tooth.

Its return to me...doesn't look to bad from 15 feet away

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But up close all the chrome parts are rusted, the aluminum parts that have bee chrome are in really sad shape, motor & tranny case are crusted over from salt air exposure, and the list goes on and on.

And of course he left the gas in the tanks (just got the tanks back to have then=nm flushed and sealed and just got the carb reassembled with new parts) and never drained the oil (so that of course meant the oil drained from the tank and ended up in the cases
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Re: 1950 EL Motor ??

#6

Post by RooDog »

Looks a lot like my project Panny I just finished three years ago.
Septenber 2017.01 (4).JPG
Septenber 2017.01 (4).JPG (591.03 KiB) Viewed 291 times
A little patina is not a bad thing, but too much just looks trashy...
You're gonna leave that $&$ B Model in place, no?
Looks like somebody did a really nice job on that left case main bearing. I didn't think it was doable....
....RooDog....
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Re: 1950 EL Motor ??

#7

Post by RUBONE »

Sadly the way the cases were modified the cast in steel sleeves for the races no longer exist, just the race in the aluminum. The right side has a bit of sleeve left, but it appears the left side has none. Definitely wouldn't hot rod that one.
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Re: 1950 EL Motor ??

#8

Post by RooDog »

Is there not a snap in place spacer that goes into the case between the races?
He mentions 1969 style bearings...
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Re: 1950 EL Motor ??

#9

Post by panz4ever »

It'll never be a hot rod, just something for my niece to cruise on. And fortunately her dad never did stupid $hit on the bike, so it should last awhile longer once I get it back together and on the road agin.
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Re: 1950 EL Motor ??

#10

Post by panz4ever »

RooDog wrote: Fri Mar 10, 2023 1:18 am Is there not a snap in place spacer that goes into the case between the races?
He mentions 1969 style bearings...
Pic of the spacer and oil seal from the left side

Image

Image
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Re: 1950 EL Motor ??

#11

Post by RooDog »

I was asking about the spacer that goes between the two case races.
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Re: 1950 EL Motor ??

#12

Post by allanpan »

Could anyone comment on the EL 61CI vs FL 74CI sound?

Is there a noticeable difference?
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Re: 1950 EL Motor ??

#13

Post by kitabel »

Obviously, a greater volume of gas is expelled when the exhaust valve cracks open.
IMHO the static CR and XO point are more important contributors. Earlier exhaust opening and higher CR make a bigger bang.
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Re: 1950 EL Motor ??

#14

Post by panz4ever »

allanpan wrote: Tue Mar 14, 2023 7:55 pm Could anyone comment on the EL 61CI vs FL 74CI sound?

Is there a noticeable difference?
I will say the last time I had this running with the straight pipes (with short baffles) it was very very loud. She wants to keep the straight pipes but I am going to install different baffles to try and reduce the "loud" a bit more.
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