inner primary

Knucklehead topics
Post Reply
PanScott
Posts: 52
Joined: Sun Oct 16, 2016 3:18 pm
Bikes: 1947 EL, 1956 FL, 1958 FLH, 1976 FLH, 1986 FXRD, 2003 FLHTI
Location: Chandler AZ

inner primary

#1

Post by PanScott » Sun Sep 17, 2017 5:34 pm

Can any one identify this inner primary? I assume it is an early replacement for an OHV model The closest I can find in Palmers book is page 90 the 39-43 production line primary. The embossing is different though. Did I get lucky and score an OEM inner? My '47 EL motor is at the guys shop that is restoring it for me so I can't test fit it.

Finally cooling down here in AZ, highs in the mid 90's time to get back to work!
Attachments
inner primary.jpg
inner primary.jpg (122.54 KiB) Viewed 384 times



Bigincher
Posts: 2780
Joined: Tue Dec 18, 2007 2:10 pm
Bikes: 1941/59 EL
1952 FL
1977 FLH
1994 Fatboy

Re: inner primary

#2

Post by Bigincher » Sun Sep 17, 2017 8:10 pm

I think Yes, you are a lucky bastard! :wink:
Not sure just looking on my phone without checking Palmer's though.
Here's a tip on spotting a repop- the threaded tabs that accept the outer cover screws are noticeably thinner on the repops. OEM are at least 1/8" thick. I did a comprehensive comparison on inner covers earlier this year on the CAIMAG forum.
V-Twin came out with a new & improved inner using "new tooling", and it actually looked pretty good so I bought one to check it out. Retail price was something over $250 if I recall. Sadly, it missed the mark.
I compared it to an OEM and a Paughco. If you can't find a decent OEM, Paughco is the best repop. It needs the oil deflector added, though.
When I fire up my PC I can look at your pictures closer, but I already see the indentation at the bottom edge that is relief for the frame seat post support strap. This identifies it as early panhead; knuckles and flatties don't need that relief due to the front of the motor being 3/8" higher. (I hope I got that right!)

Coincidentally, I have an extremely nice OEM inner that lacks the relief indent, I believe it's knuckle or flatty as I described. I've always been tempted to modify for my '52, but just can't bring myself to ruining such a nice early cover. It may be what you need though, and I'd entertain a discussion on a trade, provided the one you posted is Genuine. PM if interested.

RUBONE
Moderator
Posts: 4639
Joined: Sat Nov 15, 2008 4:09 am
Bikes: Multiple H-D, Ducati, BMW, Triumph, BSA,...

Re: inner primary

#3

Post by RUBONE » Sun Sep 17, 2017 8:23 pm

That is a Panhead primary. Note the roughly square indentation directly below the dimple, that is to clear the frame cross member as Bigincher noted. When H-D dropped the front mount for Clearance on Panhead frames the indent was necessary to prevent contact with the frame. The cover is also handshift type (splash shield), so would fit '48-'54 handshift models.

Tom, I may have an extra Panhead inner, all my projects are early except my 54FLE but I have cover for it.

Bigincher
Posts: 2780
Joined: Tue Dec 18, 2007 2:10 pm
Bikes: 1941/59 EL
1952 FL
1977 FLH
1994 Fatboy

Re: inner primary

#4

Post by Bigincher » Sun Sep 17, 2017 8:39 pm

I have that early cover for trade, for someone.
Robbie, if you want, we can start by trading photos. Mine has a cracked tab where it bolts to the oil tank, but I picked up a tab off a junker, just needs replaced/riveted on.
My Inbox is open.

Buddhahoodvatoloco
Site sponsor
Site sponsor
Posts: 567
Joined: Wed Sep 07, 2016 7:13 pm
Bikes: 1969 FLF
1937 EL Sold
1949 rat bike Sold
1946 FL Sold
Location: san diego

Re: inner primary

#5

Post by Buddhahoodvatoloco » Sun Sep 17, 2017 10:50 pm

Kewl, do you just not love these Santa Claus type men, I do...

PanScott
Posts: 52
Joined: Sun Oct 16, 2016 3:18 pm
Bikes: 1947 EL, 1956 FL, 1958 FLH, 1976 FLH, 1986 FXRD, 2003 FLHTI
Location: Chandler AZ

Re: inner primary

#6

Post by PanScott » Sat Nov 11, 2017 4:32 am

Thanks for the help fellows, I think although it is a Pan inner, that is good for me because I have a Pan Frame to put the knuck motor in. I started the restoration process on it, the bottom tab was a welded washer so I am replacing it. The primary has a split in the bend right there as well. Weld grind repeat. I found what I believe is an old repop chrome outer at the swap meet for $20.00 so I had the plating stripped off and am doing some body work on it it'll be painted.

PanScott
Posts: 52
Joined: Sun Oct 16, 2016 3:18 pm
Bikes: 1947 EL, 1956 FL, 1958 FLH, 1976 FLH, 1986 FXRD, 2003 FLHTI
Location: Chandler AZ

Re: inner primary

#7

Post by PanScott » Sat Nov 11, 2017 4:41 am

Thanks for the help fellows, I think although it is a Pan inner, that is good for me because I have a Pan Frame to put the knuck motor in. I started the restoration process on it, the bottom tab was a welded washer so I am replacing it. The primary has a split in the bend right there as well. Weld grind repeat. I found what I believe is an old repop chrome outer at the swap meet for $20.00 so I had the plating stripped off and am doing some body work on it it'll be painted.

Bigincher
Posts: 2780
Joined: Tue Dec 18, 2007 2:10 pm
Bikes: 1941/59 EL
1952 FL
1977 FLH
1994 Fatboy

Re: inner primary

#8

Post by Bigincher » Sat Nov 11, 2017 11:33 am

PanScott wrote:
Sat Nov 11, 2017 4:41 am
Thanks for the help fellows, I think although it is a Pan inner, that is good for me because I have a Pan Frame to put the knuck motor in.
Be sure to use the 3/8"' spacers at the front motor mount between the motor and the frame...!
Failure to do so will result in breaking the bosses on the engine cases, a costly and avoidable repair.
There's an HD part number for the spacers which I don't have off the top of my head. But motor installation is still the same procedure of bolting the rear mounts tight, then shimming any gaps at the front- including the use of the spacers.
Knucklehead motors are easily retrofitted into panhead frames, but the opposite is not possible without heavily 'modifying' the frame by bashing in the seatpost tube and the underside of the backbone.

Post Reply

Return to “Knucklehead”