Red Dot or Blue/Green Dot on Engine

[Riccardo]

Nooooo, I cannot believe to this.
I truly am astonished.
Are two years that we all break off the head on the red or blue dot.
And now?
We find it on the carburetors!
To this point we need Only a time machine in order to back in 1969.
And if the previous owner  has moved it on the carburetors because it did not appeal  it on the engine??Where we will find the next time to it?

[mrhonda2u]

I have just purchased Sandcast #3034 With a little over 5,000 original miles. The bike has a blue sticker with red paint.  This was owned by someone that was deeply involed in woodstock in1969 and the bike was at woodstock.

[Riccardo]

Hi,

post the photo of the bike please,  we want the emotion like you.

[tomcourtney]

First let me state i dont know.... but could it be the different assembly plant as in the link below, it says that the Hamamatsu and the siatama plants were converted for the CB750 model in 1969 Maybe? TC


http://translate.googleusercontent.com/translate_c?depth=1&hl=en&ie=UTF8&prev=_t&rurl=translate.google.com&sl=es&tl=en&u=http://www.fazermotos.com.ar/historia/Honda-750-Four.htm&usg=ALkJrhjxUfPmeqiojb-nzAWLeKn1Sgp0Fw

[Garry32]

Hi This is my blue dot from my cases it is directly under the air box number 40:: unrestored sandcast
 

[DW69K0]

Gary-
I have a blue dot in the exact location on unmolested E1685. Like yours, mine has good color. Is your Sandcast candy blue green?
DW

[Garry32]

Hi DW yes it was candy blue green blue green, But when I bought the sandcast the seller had put candy red tin ware on as they where in better condition. I am just in the process of buying the caddy blue items if
 He will part with them.
Garry

[DW69K0]

Best of luck!
DW

[4pots1969]

Hello everyone,  Here is a K0 with a frame number 1020280, dated January 1970 imported from the USA and it has a green pellet glued on carburetors...I thought it might be interesting

[Steve Swan]

green dot on gold bike kind of shoots the theory of colored dots used to designate body color......

[4pots1969]

Why not have indicated the colors by a red dot, a blue dot, and a yellow dot?? We have never seen these points of color on the French bikes...  Very dubious on this theory...

[Steve Swan]

i would suggest the color of the dot might be immaterial.  i would suggest the dot meant the motorcycle passed a final inspection, after the bike came off the assembly line.  i would suggest the dot indicated the motorcycle could be put in a crate, ready to be shipped from the factory.

[Steve Swan]

in an earlier post, someone suggested the dot might indicate which factory the bike originated from.  this could be a plausible theory.

who knows how many factories produced the CB750 in 1969 ?

so far, we have identified 2 colors for these dots ?

and, we have identified motorcycles that have no sign of ever having a dot ?

[DW69K0]

My personal belief is that the dots were place on the bike as an indicator of a problem that was found during testing that needed additional corrections during quality checks before leaving the factory. I don't have any specific information to back up my theory, but I do own two Sandcasts with blue dots close to the top casting date.
DW

[DW69K0]

Hi This is my blue dot from my cases it is directly under the air box number 40:: unrestored sandcast
 

The engine dot topic is still intriguing and mysterious.

Friday night I received a new Sandcast from CA, and during examination and documention process yesterday I discovered another Blue Engine Dot. The blue engine dot is on a Ruby red bike. This now make three engines in my possession that contain the blue dots at different Vin ranges in the exact location as Gary's photograph shows in his earlier post.
I am fully convinced that these were not placed on every engine and had to specifically call out a process or were used to bring attention to some feature or issue during assembly.
The dots are definitely made from a very hardy material as the dot survives well in the location and retains good colors after almost 50 years of environmental exposure.
My theory still stands that the dots indicated an issue during inspection, but I don't have any evidence or facts to back it up. Maybe we will will learn more as time passes, this seems to be lingering as another Sandcast mystery.

Best,
DW