Author Topic: Early Sandcast Found......  (Read 89873 times)

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Offline Don R

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Re: Early Sandcast Found......
« Reply #475 on: December 29, 2021, 08:35:26 am »
  My replacement K0 fork tubes seem a bit oversize. Watch out for that when tightening the top triple. I can't draw the D washers up tight.
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Offline seanbarney41

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Re: Early Sandcast Found......
« Reply #476 on: December 29, 2021, 12:04:28 pm »
Don, I have never seen any where you actually can draw the d washers tight.  If they are captured, you have way over-torqued.  That is why I never understood what the big deal with these has become.  What was Honda's purpose of installing them?
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Offline RAFster122s

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Re: Early Sandcast Found......
« Reply #477 on: December 29, 2021, 01:54:57 pm »
I think it wasHonda’s attempt to prevent a ham fisted mechanic of over torquing the pinch bolts leading to cracked triple tree clamps from fatigue from the jolts if they could torque them closed to begin with….
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Offline Don R

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Re: Early Sandcast Found......
« Reply #478 on: December 29, 2021, 02:55:57 pm »
Agreed. I have several broken ones, a couple done by myself, believing you were supposed to draw them tight.
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.

Offline BenelliSEI

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Re: Early Sandcast Found......
« Reply #479 on: December 29, 2021, 03:03:20 pm »
  My replacement K0 fork tubes seem a bit oversize. Watch out for that when tightening the top triple. I can't draw the D washers up tight.

Don…. I found the same thing last time I used a set! Where did you get yours? I think I went to CycleEx. My originals are not bad, I may reuse them.

Offline Terry in Australia

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Re: Early Sandcast Found......
« Reply #480 on: December 30, 2021, 01:55:25 am »
I've actually had a "Rhino" top triple that wasn't busted, but the gap was so tight with no bolt in it that I couldn't fit a D washer in it! ;D
I was feeling sorry for myself because I couldn't afford new bike boots, until I met a man with no legs.

So I said, "Hey mate, you haven't got any bike boots you don't need, do you?"

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Offline PeWe

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Re: Early Sandcast Found......
« Reply #481 on: December 30, 2021, 03:46:23 am »
I had to check my K2 with US rhino. Yes, the D washers sit loose, rattling.
I doubt the fork tubes are too wide. They should be tricky to fit the trees then. I put a screwdriver in each opening open them a little more to ensure no scratches in the chrome when assembled it.

It has tubes from cyclex 2013. I later ordered a set from davidsilver uk that had same wrapping around them. I think it was a Korean company. I see same wrapping from German sellers too.

Can the earlier stock tubes be thinner at the upper part?
I measured old Honda tubes from 1974-75. Same diameter.

That washer must be a stopper for muscular truck mecanics?
The later version has a thinner bolt here, M6, not M8 as the earlier. Probably to stop the guys with 1/2" socket wrenches.
« Last Edit: December 30, 2021, 04:38:01 am by PeWe »
CB750 K6-76  970cc (Earlier 1005cc JMR Billet block on the shelf waiting for a comeback)
CB750 K2-75 Parts assembled to a stock K2

Updates of the CB750 K6 -1976
http://forums.sohc4.net/index.php/topic,180468.msg2092136.html#msg2092136
The billet block build thread
http://forums.sohc4.net/index.php/topic,49438.msg1863571.html#msg1863571
CB750 K2 -1975  build thread
http://forums.sohc4.net/index.php/topic,168243.msg1948381.html#msg1948381
K2 engine build thread. For a complete CB750 -75
http://forums.sohc4.net/index.php/topic,180088.msg2088008.html#msg2088008
Carb jetting, a long story Mikuni TMR32
http://forums.sohc4.net/index.php/topic,179479.msg2104967.html#msg2104967

Offline 69cb750

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Re: Early Sandcast Found......
« Reply #482 on: December 30, 2021, 06:40:37 am »
Quote
Don, I have never seen any where you actually can draw the d washers tight.  If they are captured, you have way over-torqued.  That is why I never understood what the big deal with these has become.  What was Honda's purpose of installing them?
The purpose was to protect the clamp, the D washers are to thin.
Two bikes came with D washers and broken clamps.

Offline Don R

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Re: Early Sandcast Found......
« Reply #483 on: January 04, 2022, 10:41:29 am »
   I'm thinking my fork tubes were from 4-1 or one of the other ebay suppliers. Probably china made. Forks by Frank were not shipping back then. 
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.

Offline Terry in Australia

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Re: Early Sandcast Found......
« Reply #484 on: January 04, 2022, 05:01:24 pm »
Is "Forking by Frank" still in operation? I bought some 2" over tubes from them 20 years ago, was very impressed. ;D
I was feeling sorry for myself because I couldn't afford new bike boots, until I met a man with no legs.

So I said, "Hey mate, you haven't got any bike boots you don't need, do you?"

"Crazy is a very misunderstood term, it's a fine line that some of us can lean over and still keep our balance" (thanks RB550Four)

Offline Don R

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Re: Early Sandcast Found......
« Reply #485 on: January 04, 2022, 05:15:58 pm »
https://www.franksforks.com/  I think the original frank is no longer with us.
« Last Edit: January 04, 2022, 05:17:55 pm by Don R »
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.

Offline BenelliSEI

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Re: Early Sandcast Found......
« Reply #486 on: January 04, 2022, 05:40:02 pm »
https://www.franksforks.com/  I think the original frank is no longer with us.

Don… thanks for the link! I sent for a quote and will try Franks.

Offline BenelliSEI

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Re: Early Sandcast Found......
« Reply #487 on: January 05, 2022, 07:09:34 am »
Yesterday I was looking at my fuel tank. It’s a true wrinkle tank, with four clear indents for the carb tops, in the bottom panel. Somewhere here (years ago) I remember reading about wrinkle tanks without the recesses.....

Anyone have more details? Thanks!

Offline 69cb750

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Re: Early Sandcast Found......
« Reply #488 on: January 05, 2022, 08:05:27 am »
Early sandcast tanks do not have indent
Later sandcast tanks have the indent, the change gave throttle cables more room.

Offline Prospect

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Re: Early Sandcast Found......
« Reply #489 on: January 05, 2022, 03:44:56 pm »
Correct. Also, the early ones had larger capacity by two litres. Apparently there is a 2 dimple tank version as well. So Honda went from no diplme to two dimples to four dimples.
« Last Edit: January 05, 2022, 03:47:34 pm by Prospect »
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Offline BenelliSEI

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Re: Early Sandcast Found......
« Reply #490 on: January 06, 2022, 06:24:24 am »
Early sandcast tanks do not have indent
Later sandcast tanks have the indent, the change gave throttle cables more room.

Interesting...... mines’s pretty early, #1250. It clearly has the 4 dimples.

Offline atm cycles

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Re: Early Sandcast Found......
« Reply #491 on: January 06, 2022, 04:45:56 pm »
Early sandcast tanks do not have indent
Later sandcast tanks have the indent, the change gave throttle cables more room.

Interesting...... mines’s pretty early, #1250. It clearly has the 4 dimples.
What’s the date code? Yours should be double wrinkle tank like the red one

Offline BenelliSEI

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Re: Early Sandcast Found......
« Reply #492 on: January 06, 2022, 05:47:15 pm »
Early sandcast tanks do not have indent
Later sandcast tanks have the indent, the change gave throttle cables more room.

Interesting...... mines’s pretty early, #1250. It clearly has the 4 dimples.
What’s the date code? Yours should be double wrinkle tank like the red one

It’s too early for a VIN plate or date code. Tank looks identical to the red one. I’ll take a picture next time.

Offline atm cycles

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Re: Early Sandcast Found......
« Reply #493 on: January 06, 2022, 05:56:19 pm »
Date code on the tank

Offline BenelliSEI

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Re: Early Sandcast Found......
« Reply #494 on: January 06, 2022, 06:02:38 pm »

Offline atm cycles

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Re: Early Sandcast Found......
« Reply #495 on: January 06, 2022, 06:03:52 pm »
I’m trying. Says file too large

Offline atm cycles

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Re: Early Sandcast Found......
« Reply #496 on: January 06, 2022, 06:08:11 pm »
Underside. Where rear rubber holder is

Offline Prospect

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Re: Early Sandcast Found......
« Reply #497 on: January 06, 2022, 06:10:18 pm »
The date code is underneath by where the rubber absorber attaches. Near the side closer to the seat. Where you see all those little indentations.
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1969 CB750  Sandcast #256
1971 CB750K1
1972 CB750K1
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1975 GL1000 Goldwing
1954 Harley Davidson Panhead
1957 Harley Davidson Panhead

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Offline Prospect

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Re: Early Sandcast Found......
« Reply #498 on: January 06, 2022, 06:16:00 pm »
Usually starts with a 4 followed by some other numbers which relate to the anniversary of the swearing in of the Japanese emperor.
Current Bikes

1969 CB750  Sandcast #256
1971 CB750K1
1972 CB750K1
1975 CB400F
1975 GL1000 Goldwing
1954 Harley Davidson Panhead
1957 Harley Davidson Panhead

Toronto Canada

Offline atm cycles

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Re: Early Sandcast Found......
« Reply #499 on: January 07, 2022, 01:19:24 pm »
4 3 then something between 1-31 ?