1950 Panhead EL

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robbie
Posts: 1
Joined: Mon Jan 08, 2007 10:30 pm
Location: Netherlands

1950 Panhead EL

#1

Post by robbie » Mon Nov 14, 2005 12:57 am

I am looking at buying a 50 pan EL. The owner says it is 80cu. in. now. What is the difference between the 61ci and the 74ci besides 13ci. what parts if any are the same as the 74ci (primary covers, pan covers,Drings)



VintageTwin
Panhead Register Member
Posts: 618
Joined: Mon Aug 16, 2010 7:18 pm
Bikes: '46 Knuck. '57 Panhead, '59 Panhead
Location: Repop Hell

Re: 1950 Panhead EL

#2

Post by VintageTwin » Mon Nov 14, 2005 8:53 am

At 80 cu. in. your starting to get the lunge factor. Lunge forward when you turn off the throttle. Lunge back when you turn the throttle on. Some say it's physically wearing to ride. Others say 80 cu. in. is not enough, it ought to be 180 cu. in. Some say that when you build a Pan motor up on the top end, the bottom end will go out. And when you build the bottom end up the top will go out. Don't know what happens when you build the top and bottom up. Your '50 has shims and not Timken bearings (stock). Don Tilley (factory tech) says, "I can make'em fast and I can make 'em last, but you can't have both".
The difference between 61 & 74 is at least: pistons; cylinders; rods; intake manifold ports (interchangeable between 61 & 74); carburetor; and...uuuhhhhh...hmmmm....probably about it.

BIGAL
Posts: 3
Joined: Fri Jul 13, 2007 1:31 pm

Re: 1950 Panhead EL

#3

Post by BIGAL » Mon Nov 14, 2005 6:21 pm

the 61 is a 3 1/2 stroke the 74 is 3 31/32---I put 74 flywheels
in my 61---shorter jugs had to put stroker plates in-----ran my
61 for 20 years---blew the 74 in six months--wish I never changed
80 flywheels don't fit a 61 unless they are aftermarket
If its still a 61 keep it

NB

Re: 1950 Panhead EL

#4

Post by NB » Wed Nov 16, 2005 4:43 pm

''At 80 cu. in. your starting to get the lunge factor. Lunge forward when you turn off the throttle. Lunge back when you turn the throttle on. Some say it's physically wearing to ride. Others say 80 cu. in. is not enough, it ought to be 180 cu. in. Some say that when you build a Pan motor up on the top end, the bottom end will go out. And when you build the bottom end up the top will go out. Don't know what happens when you build the top and bottom up. Your '50 has shims and not Timken bearings (stock). Don Tilley (factory tech) says, "I can make'em fast and I can make 'em last, but you can't have both".''
The difference between 61 & 74 is at least: pistons; cylinders; rods; intake manifold ports (interchangeable between 61 & 74); carburetor; and...uuuhhhhh...hmmmm....probably about it.

weezeo
Posts: 94
Joined: Wed Mar 24, 2004 8:47 am
Location: South Florida

Re: 1950 Panhead EL

#5

Post by weezeo » Wed Nov 16, 2005 10:03 pm

el = 61 ci
fl = 74 ci
el small fl big

53rigidrider
Posts: 42
Joined: Fri Jul 13, 2007 8:02 am
Location: Puget Sound

Re: 1950 Panhead EL

#6

Post by 53rigidrider » Fri Nov 18, 2005 4:41 pm

I know that some hop-ups on cases before before the FLH models, can do some serious damage because of shaft differences and case manufacturing. I prefer to have the heads flowed ported & polished, with bigger valves, and a cam change.
If you want to go zip try a bigger trans sprocket.
I like my lil' stocker 74 just the way it is!
"Potato, potato, potato!"

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