Author Topic: Wrinkle tank  (Read 2623 times)

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Offline Sgt.Pinback

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Wrinkle tank
« on: November 24, 2015, 11:22:45 AM »
Hi,

can it be said up to which VIN they had used the wrinkle tank?

Wonder, my 19xxx has a it, my 16xxx has not.
Doc, I love a motorcycle!

Offline Powderman

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Re: Wrinkle tank
« Reply #1 on: November 24, 2015, 01:10:58 PM »
I believe they were only on the early sand cast models, so VIN's below 7414. Neither of yours had the wrinkle tank. Do you have a pic of the underside of yours? The sought after, rare wrinkle tank is wrinkled along the wide tunnel as well as the narrow tunnel. You will be able to see wrinkles in the tunnel when you look in the fill hole:


While it is wrinkled in the narrow tunnel, these are not what are usually referred to when talking wrinkle tank:
« Last Edit: November 24, 2015, 01:30:16 PM by Powderman »

Offline flybox1

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Re: Wrinkle tank
« Reply #2 on: November 24, 2015, 01:23:17 PM »
The primer tank pictured above is not a wrinkle tank.
« Last Edit: November 24, 2015, 01:39:23 PM by flybox1 »
'78 750K (F3 engine) PD42b's, Modified airbox w/K&N  filter, 40/110 jets, 1 needle shim, IMS@ 1 turn out. Kerker + Cone 18" QuietCore

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Offline flybox1

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Re: Wrinkle tank
« Reply #3 on: November 24, 2015, 01:28:00 PM »
reference the recessed frame area, just posterior to the mount tabs.
'78 750K (F3 engine) PD42b's, Modified airbox w/K&N  filter, 40/110 jets, 1 needle shim, IMS@ 1 turn out. Kerker + Cone 18" QuietCore

Past Bikes
1974 550K0 (stock), 1973 CB350F (stock), 1983 Yamaha XS400K (POS)
77/78 cool 2 member #3
"Knowledge without mileage equals bullsh!t" - Henry Rollins

"This is my CB. There are many like it, but this one is mine…"

Offline Don R

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Re: Wrinkle tank
« Reply #4 on: November 24, 2015, 01:34:57 PM »
1014100 had one.
No matter how many times you paint over a shadow, it's still there.
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Offline Powderman

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Re: Wrinkle tank
« Reply #5 on: November 24, 2015, 01:36:21 PM »
neither of those tanks pictured above (green and primer) are wrinkle tanks.
both are smooth where the wrinkles need to be.
The bottom of the green tank is clearly wrinkled in the wide tunnel and in the area where the cap is. What are you looking at? The pic of the primer tank says it is not a wrinkle tank. Your tank is from the second run with the 4 dimples for carb clearance. The green tank is from the first run, pre carb dimple..
« Last Edit: November 24, 2015, 01:46:20 PM by Powderman »

Offline Powderman

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Re: Wrinkle tank
« Reply #6 on: November 24, 2015, 01:38:09 PM »
1014100 had one.
Do you know for fact it came from the factory, or could it have been replaced during it's life?

Here's a better explanation:

http://www.cb750sandcastonly.com/support12.htm
« Last Edit: November 24, 2015, 01:44:02 PM by Powderman »

Offline Sgt.Pinback

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Re: Wrinkle tank
« Reply #7 on: November 24, 2015, 01:48:18 PM »
Again: my 19xxx has one.

 That's the original tank on this bike.
Doc, I love a motorcycle!

Offline Powderman

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Re: Wrinkle tank
« Reply #8 on: November 24, 2015, 02:03:30 PM »
Again: my 19xxx has one.

 That's the original tank on this bike.
There have been 3 examples of wrinkle tanks, yours has one what? Post a pic.

Offline 754

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Re: Wrinkle tank
« Reply #9 on: November 24, 2015, 02:34:50 PM »
Lots of bikes had wrinkle tanks to at least end of 69 and even longer..but some did not have them..
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Offline kmb69

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Re: Wrinkle tank
« Reply #10 on: November 24, 2015, 04:35:42 PM »
1014100 had one.
Do you know for fact it came from the factory, or could it have been replaced during it's life?
.....
Many 1970 K0's were shipped from Honda with wrinkle tanks.

Offline jack58

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Re: Wrinkle tank
« Reply #11 on: November 24, 2015, 05:42:38 PM »
my Jan of 1970 #1021198 in the gold color came with a wrinkle tank and a plug key switch and single cut fender

Offline Sgt.Pinback

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Re: Wrinkle tank
« Reply #12 on: November 24, 2015, 11:44:49 PM »
Again: my 19xxx has one.

 That's the original tank on this bike.
There have been 3 examples of wrinkle tanks, yours has one what? Post a pic.

Voilá


So sometimes (e.g. my 19xxx and the 21xxx of Jack) diecast came with wrinkle tank, sometimes not (my 16xxx)

Seems there does´nt be a clear VIN cutoff.


Doc, I love a motorcycle!

Swoop

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Re: Wrinkle tank
« Reply #13 on: November 25, 2015, 02:47:48 AM »
My 16,000 had one. Also double cut fender and no number pipes.

Steve

Offline Powderman

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Re: Wrinkle tank
« Reply #14 on: November 25, 2015, 08:42:49 AM »
I thought they were valuable because they only came on the first run sand casts. Apparently not, only the misconception that they did. Whether your bike has one or not doesn't mean much as far as restoration goes.

Offline flybox1

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Re: Wrinkle tank
« Reply #15 on: November 25, 2015, 09:10:03 AM »
I wonder then when did Honda do away with the 4 dimples for the carb tops?
'78 750K (F3 engine) PD42b's, Modified airbox w/K&N  filter, 40/110 jets, 1 needle shim, IMS@ 1 turn out. Kerker + Cone 18" QuietCore

Past Bikes
1974 550K0 (stock), 1973 CB350F (stock), 1983 Yamaha XS400K (POS)
77/78 cool 2 member #3
"Knowledge without mileage equals bullsh!t" - Henry Rollins

"This is my CB. There are many like it, but this one is mine…"

Offline flybox1

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Re: Wrinkle tank
« Reply #16 on: November 25, 2015, 09:14:32 AM »
neither of those tanks pictured above (green and primer) are wrinkle tanks.
both are smooth where the wrinkles need to be.
The bottom of the green tank is clearly wrinkled in the wide tunnel and in the area where the cap is. What are you looking at? The pic of the primer tank says it is not a wrinkle tank. Your tank is from the second run with the 4 dimples for carb clearance. The green tank is from the first run, pre carb dimple..
I was referencing the shiny freshly painted green tank you originally posted.   ;D Clearly, it was not an early Honda wrinkle tank.
Thank you for inserting a correct photo.
'78 750K (F3 engine) PD42b's, Modified airbox w/K&N  filter, 40/110 jets, 1 needle shim, IMS@ 1 turn out. Kerker + Cone 18" QuietCore

Past Bikes
1974 550K0 (stock), 1973 CB350F (stock), 1983 Yamaha XS400K (POS)
77/78 cool 2 member #3
"Knowledge without mileage equals bullsh!t" - Henry Rollins

"This is my CB. There are many like it, but this one is mine…"

Offline dhall57

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Re: Wrinkle tank
« Reply #17 on: November 25, 2015, 09:32:03 AM »
Not in the garage right right now but I know my KO vin starts with 103xxxx and has a  4/70 production date and it has the wrinkle tank.
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1974 CB750K4-project bike
1974 CB750K4
1976 CB750K6
1977 GL1000
1997 Harley Wideglide

Offline 754

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Re: Wrinkle tank
« Reply #18 on: November 25, 2015, 09:34:14 AM »
I think its just evidence that they had more than one assembly line..
Maker of the WELDLESS 750 Frame Kit
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Kelowna B.C.       Canada

My next bike will be a ..ANFOB.....

It's All part of the ADVENTURE...

73 836cc.. Green, had it for 3 decades!!
Lost quite a few CB 750's along the way

Offline kmb69

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Re: Wrinkle tank
« Reply #19 on: November 25, 2015, 03:59:10 PM »
I thought they were valuable because they only came on the first run sand casts. Apparently not, only the misconception that they did. Whether your bike has one or not doesn't mean much as far as restoration goes.
The restoration "purists" would certainly take exception to that last sentence.
They are "relatively" rare and nice originals usually command hefty dollars.
I would certainly devalue a bike that was suppose to have one and did not.

Offline Powderman

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Re: Wrinkle tank
« Reply #20 on: November 25, 2015, 04:05:15 PM »
I thought they were valuable because they only came on the first run sand casts. Apparently not, only the misconception that they did. Whether your bike has one or not doesn't mean much as far as restoration goes.
The restoration "purists" would certainly take exception to that last sentence.
They are "relatively" rare and nice originals usually command hefty dollars.
I would certainly devalue a bike that was suppose to have one and did not.

No where have we discussed what was suppose to have one and what was not. Can you tell me what was suppose to have one? My sand cast #1644 doesn't have one. Purists don't like powder coating but can't give me a valid reason why. What purists want for paint on a frame restoration is inferior in every aspect to powder.

Offline 754

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Re: Wrinkle tank
« Reply #21 on: November 25, 2015, 04:32:55 PM »
#1644 should have one..
Often original is inferior to todays stuff..but you got to decide.. Restoration or upgraded non original components.
 
Maker of the WELDLESS 750 Frame Kit
dodogas99@gmail.com
Kelowna B.C.       Canada

My next bike will be a ..ANFOB.....

It's All part of the ADVENTURE...

73 836cc.. Green, had it for 3 decades!!
Lost quite a few CB 750's along the way

Offline kmb69

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Re: Wrinkle tank
« Reply #22 on: November 25, 2015, 05:55:52 PM »
I thought they were valuable because they only came on the first run sand casts. Apparently not, only the misconception that they did. Whether your bike has one or not doesn't mean much as far as restoration goes.
The restoration "purists" would certainly take exception to that last sentence.
They are "relatively" rare and nice originals usually command hefty dollars.
I would certainly devalue a bike that was suppose to have one and did not.

No where have we discussed what was suppose to have one and what was not. 1. Can you tell me what was suppose to have one? 2. My sand cast #1644 doesn't have one. 3. Purists don't like powder coating but can't give me a valid reason why. 4. What purists want for paint on a frame restoration is inferior in every aspect to powder.
1. ALL SANDCASTS came from the factory with wrinkle tanks. You cannot always be sure regarding the K0's. It's usually safe to say they came with one if they have all of the other specific Sandcast parts. There may be exceptions and all of the above effects the value of Sandcasts and K0's. They are only worth what someone is willing to pay and that is usually determined by their level of authenticity.

2. Your Sandcast #1644 does not have the original tank. It would be devalued accordingly and that would run up the caution flag about other non-original parts.

3. The reason why is, THEY ARE ONLY ORIGINAL ONCE. Depending on an individual's required level of restoration, depends on how much they are willing to deviate from the original parts, paint, and everything else. A powder coated frame would have points taken off in a restoration contest. Wikepedia says:

"Automobile restoration is the process of repairing the degraded aspect of an automobile to return it to an overall "authentic" condition. Restorations should be historically accurate as a representative example of the production model. For example, the guidelines of the Antique Automobile Club of America (AACA) are to "evaluate an antique vehicle, which has been restored to the same state as the dealer could have prepared the vehicle for delivery to the customer"."

"In contrast to preserving its historical artifacts through restoration or to conserve significant vehicles by keeping original surfaces and materials, some owners make changes or add modern upgrades during the restoration of their cars that may reduce or enhance the value of the vehicle. In the U.S. a non-original restored car may be termed a "restored"."

https://en.wikipedia.org/wiki/Automotive_restoration

The same is true for motorcycle restorations. Like I said, they are only ORIGINAL ONCE and are only worth what someone is willing to pay.

4. True, but they did not come ORIGINALLY with powder coated frames.


Offline Don R

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Re: Wrinkle tank
« Reply #23 on: November 25, 2015, 09:36:38 PM »
I think we've determined all sandcasts and a lot of early diecast bikes came with wrinkle tanks. Mine is the 1014100 I didn't buy it new so I can't say it's original for sure.  1005511 has the one it came with new.
 No one has as yet answered the cutoff date  question.
No matter how many times you paint over a shadow, it's still there.
 CEO at the no kill motorcycle shop.
 You don't need a weatherman to know which way the wind blows.