XLCH Oil Tank Guess-A-Thon

Classic short-frame models

XLCH Oil Tank Guess-A-Thon

Postby hennesse » Mon Nov 02, 2015 9:49 pm

Folks - I was working up an article on the XLCH oil tanks, but then realized I'm totally lost. So help me find myself by identifying these XLCH oil tanks.
P.S. Is the elusive 62503-52A in this bunch? Or does it remain elusive?


Tank #1
Labelled Outlets. Strange(?) spatial relationship among the 4 outlets ?
DMH_006185-72-720x576.jpg
Tank #1
DMH_006185-72-720x576.jpg (64.89 KiB) Viewed 20416 times


Tank #2
Sorry-looking tank, but it shows a much different spatial relationship than Tank #1
Note spacing between "circle stampings" of Vent and Return is 1/4" - width of a #2 pencil
ebay1.jpg
Tank #2
ebay1.jpg (91.35 KiB) Viewed 20416 times


Tank #3
Look closely at the feed outlet shape, location, and lack of "circle stamping" around it.
Actual #2 pencil shown. Pencil imprinted "Let's Get Back To Basics"
DMH_006190-72-720x576.jpg
Tank #3
DMH_006190-72-720x576.jpg (71.6 KiB) Viewed 20416 times


Tank #4
Sumpin' about this should make it easy to identify. Pun intended.
UNK_0000-72-720x576.jpg
Tank #4
UNK_0000-72-720x576.jpg (59.88 KiB) Viewed 20416 times


Tank #5
Bi-lateral symmetry. Very strange. Check the Gallery section.
tank5.jpg
Tank #5
tank5.jpg (75.63 KiB) Viewed 20416 times
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Re: XLCH Oil Tank Guess-A-Thon

Postby thefrenchowl » Tue Nov 03, 2015 3:39 am

Bottom one is deffo K period, seen 2 x on KRMs so far and 1 on eBay a few years back

They all also have variations on the mounting plate arrangement, some closed/welded, some open...

Patrick
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Re: XLCH Oil Tank Guess-A-Thon

Postby thefrenchowl » Tue Nov 03, 2015 8:08 am

And the bigger brother, 6 quarts special for KRTT, slightly varying shapes as well since they were singly made:

Image

Slotted on top at the back to clear the shock absorbers...

Patrick
Last edited by thefrenchowl on Tue Nov 03, 2015 5:12 pm, edited 2 times in total.
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Re: XLCH Oil Tank Guess-A-Thon

Postby thefrenchowl » Tue Nov 03, 2015 8:39 am

Open back:

Image

Welded back:

Image
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Re: XLCH Oil Tank Guess-A-Thon

Postby Yard Dog » Tue Nov 03, 2015 3:18 pm

Here is a shot of a variant tank I saw at a meet last spring. I set it by a CH tank for size comparison. I am out of my comfort zone with stuff from the race stables but I suspect that 1st tank with the wide spacing is also a racer. Maybe Patrick or one of the other speed junkies can ID it.

What grabbed me was that tank with the hex fitting for the feed line. Is that your 62 Dave ? I have heard that there was a running change in 62 from the early flat bottom to the sump feed tank. If that hex fitting is positioned lower , could that have been a transition tank ?

Jack


OK, my tablet says that file is too big and I am too computer illiterate to do anything about that. Anyway it is very similar to the one Patrick identified as a KRTT.
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Re: XLCH Oil Tank Guess-A-Thon

Postby thefrenchowl » Tue Nov 03, 2015 5:07 pm

The hex fitting without the anti weld distortion punch out bit is awfully near the bottom and ready to catch all the crud settled in the bottom of the the tank...

I can't see that as being factory made... All the tanks I've seen from H-D have the punch out bits...

As for the 1" spacing of the top 2 fittings, this must also be a 52/69? KR oil tank feature since you couldn't fit the vent that far in on a Sportster due to the taller rear head: look at my KRTT oil tank, it's the same wider spacing...

So the tank number 1 must be the KR 52A one?

Patrick
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Re: XLCH Oil Tank Guess-A-Thon

Postby hennesse » Tue Nov 03, 2015 5:21 pm

Yard Dog wrote:What grabbed me was that tank with the hex fitting for the feed line. Is that your 62 Dave ? I have heard that there was a running change in 62 from the early flat bottom to the sump feed tank. If that hex fitting is positioned lower , could that have been a transition tank ?


Jack - Yes, that's my 1962. It looks like the 62503-52 tank was used from 1958 to 1961, and the -52B tank was used about 1963 to 1965. The 1963 and 1965 Parts Catalog lists some fittings changes for "to early 1962" and "late 1962 to", so it looks like something changed in mid-1962. Both catalogs list the -52B tank as "used on" 1958 to * but that's just a "fits".

What happened to the -52A? What was it, and when was it used? My bike was almost totally stock. The previous owner removed the generator, regulator, horn and brake light switch because he was a weekend racer, and didn't drive it on the street. The shocks were replaced, but they look like ones on Gene Paynes 1961 XLR. It had the stock Dual Seat, and also had the solo and plunger/springs (I have the Dual Seat in the garage). Other than that, it appears bone stock. So I think my oil tank is a good candidate for being the -52A. The oddball feed outlet may have been an attempt to lower the feed, perhaps due to sloshing on hard turns or something. I suspect that this tank may have been used for the first half of 1962, but then the sump idea won out.

I do want to document the -52, -52A, and -52B, so people know what they are looking for at the swap meets. The KRs and XLRs had a variety of tanks (the KRs being responsible for the -52 part number), and like French Owl says, were often one-of-a-kind, and kinda beyond our scope.

P.S. I stumbled across the swiss cheese horn. I think the horn changed in early 1962. How early? Not sure, but there's a possibility that my bike originally had the older style horn on it. Hard to tell.
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DaveC Weighs in on the Guess-A-Thon

Postby hennesse » Wed Nov 04, 2015 1:26 am

DaveC may have been committing a minor infraction when he called me from his car earlier this evening...

Here's his contribution to the Guess-A-Thon:

Tank #1 - definitely a KR (KRM, etc) tank - vent would not fit behind an XL rear head. Noted that the KR-type tanks had the various outlets moved to keep the rubber hoses away from the exhaust pipes, and there are many variants. Also 5 or 6 quart tanks were used on road-racing KRTT or KHRTT as they burned a lot of oil on the long runs - unlike the dirt-track KRs which only went a few laps.

Tank #2 - 1958-1961 standard tank

Tank #3 - Late 1961 to early 1962 - Feed was lowered so the engine got the last available drop of oil before the tank ran dry. But the sump was better.

Tank #4 - Late 1962 to 1965 - The sump definitely ensured the engine got the last drop of oil.

Tank #5 - DaveC says he partially fabricated this KRM tank for Tom White.



[ Dave H's note: Tank #1 came on my 54 KH "KHRM wanna-be". The previous owner cracked one head, so Bob Emmons(?) of Frederick MD H-D put on KR heads, and KR double-valve springs. So it stands to reason that he would have had access to a KR-type oil tank too. ]
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Re: XLCH Oil Tank Guess-A-Thon

Postby Simon » Wed Nov 04, 2015 11:25 pm

Hi,

I own and have seen a few of the tank #5 variant, always on the off road machines. I've seen some without it though, so I'm keen to understand whether they were on both KRM and KHRM, or one or the other. Can anyone help?

Regarding the 6 quart I agree with Patrick on the multiple variations - I've seen about 5 different version from small filler cap, to large cap, and large cap with "spout" etc.
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Re: XLCH Oil Tank Guess-A-Thon

Postby thefrenchowl » Thu Nov 05, 2015 3:41 am

Hi Simon, only seen it on KRMs but not on all of them... KHRM seems to go for KR tanks plain and simple from what I've seen...

Since KHRM has the brake cross over moved just under the oil tank, does it entails it might be a bit special????

Patrick
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