Author Topic: Late 750 engine with a difference. (Read 3757 times)

1080 · « **on:** November 29, 2008, 09:33:14 PM »

Picked up this late 750 motor with the serial number being locate in a different location.
Anyone seen them before, know more about them? 1080.

754 · « **Reply #1 on:** November 29, 2008, 09:48:44 PM »

Note the raised pad on the bottom of pic#2..it has a HM logo on it, so does the head.

If I have seen one of these before, I certainly dont remember it...

Magpie · « **Reply #2 on:** November 29, 2008, 11:02:04 PM »

By the numbers it looks like a '78K motor.
Cliff.

MrZxp · « **Reply #3 on:** November 29, 2008, 11:54:51 PM »

Yes. Same place as my F.

Cheers, Phil

Grumpol · « **Reply #4 on:** November 29, 2008, 11:59:35 PM »

The boss with the engine number on my F runs parallel to the starter, 90 degrees to this one

Jakoba · « **Reply #5 on:** November 30, 2008, 05:24:38 PM »

Hey 1080,
that's in the exact same spot and has the same raised panel as my 78 750K.
#E3050200

Sorry about the clarity of the pic.

1080 · « **Reply #6 on:** November 30, 2008, 08:21:25 PM »

I like to find out when they started the new location. I know my 78k that I have owned from new is parallel to starter. It was built in 09/77. Can those who have the 90 degree serial numbered blocks post their manufactured dates. Please indicate K of F models. Maybe we can get a rough idea when the change occured.

Grumpol · « **Reply #7 on:** November 30, 2008, 10:59:13 PM »

Quote from: 1080 on November 30, 2008, 08:21:25 PM

I like to find out when they started the new location. I know my 78k that I have owned from new is parallel to starter. It was built in 09/77. Can those who have the 90 degree serial numbered blocks post their manufactured dates. Please indicate K of F models. Maybe we can get a rough idea when the change occured.

Quote from: Grumpol on November 29, 2008, 11:59:35 PM

The boss with the engine number on my F runs parallel to the starter, 90 degrees to this one

The numbers on mine tell me it is a 76 F engine

Jakoba · « **Reply #8 on:** December 01, 2008, 10:36:33 AM »

I'm at work right now but I will get you that info when I get home.

Cheers

Jako

Jakoba · « **Reply #9 on:** December 01, 2008, 10:42:05 AM »

1080,
just remebered that I had a pic of my buddy's 2nd 78 750k (Mossy21) and check out where his engine tag is

I'll have to get the date off of his bike for you.

cheers

Jako

Jakoba · « **Reply #10 on:** December 01, 2008, 01:45:58 PM »

Hey 1080,
as promised....my bike mas made in 01/78.

As soon as I get the info on Mossy's 2 78's I'll be back.

Cheers

Jako

1080 · « **Reply #11 on:** December 01, 2008, 08:42:51 PM »

Thanks Jakoba. 01/78 so far the earliest.

Grumpol, yours is what is common since 1969 (parallel to starter).

MrZxp, got a frame with a manufacture date for that F motor.

I need more. Earlier to Jakoba, or later that year to see if they remain that way, or any with parallel with later dates.

One thing to note is the bike history should be known.

MrZxp · « **Reply #12 on:** December 01, 2008, 10:57:25 PM »

Quote from: 1080 on December 01, 2008, 08:42:51 PM

MrZxp, got a frame with a manufacture date for that F motor.

Sorry, but this bike never had a frame tag when I got it, I guess a PO removed it (or it never had one), so no idea on year of manufacture.... $:-\$

The issue is clouded in my case anyhow as my F is a "G" frame, not very common, so who knows when it was made...!

russouno · « **Reply #13 on:** December 02, 2008, 11:19:46 AM »

CB750E-3004335

78k

1080 · « **Reply #14 on:** December 02, 2008, 07:12:04 PM »

Nice 78k russouno.
Got a Manufacture date?
Earlier than Jakoba, but parallel like my 78. Must be a _ _ /77 date?

78CB750CAFE · « **Reply #15 on:** December 02, 2008, 07:18:45 PM »

my 78K was manufactured 11/77 and has the common serial # parallel to the starter

754 · « **Reply #16 on:** December 02, 2008, 08:13:15 PM »

I am starting to think...

(I know that is a skeery thot..

)

..that there is a pile of these UNSTAMPED, sitting somewhere....

Jakoba · « **Reply #17 on:** December 03, 2008, 11:22:43 AM »

Quote from: Jakoba on December 01, 2008, 10:42:05 AM

1080,
just remebered that I had a pic of my buddy's 2nd 78 750k (Mossy21) and check out where his engine tag is

I'll have to get the date off of his bike for you.

cheers

Jako

I was just chatting with Mossy21 and both his bikes have the same engine serial number position...opposite to mine.

One bike is a 9/77 and the other is an 8/77.

He also mentioned that anything from 6/77 on, is considered a 78.

cheers

Jako

eldar · « **Reply #18 on:** December 03, 2008, 11:40:24 AM »

12/77 on mine but I do not remember off hand where the numbers are.

russouno · « **Reply #19 on:** December 03, 2008, 11:52:57 AM »

I'll look for the mfg date after work

bwaller · « **Reply #20 on:** December 03, 2008, 01:59:46 PM »

Maybe be completely useless information as I don't have a frame with a date of manufacture, but here is the engine # 3020176 clearly from a 78K.

eldar · « **Reply #21 on:** December 03, 2008, 03:28:13 PM »

I think my numbers are like that pic.

754 · « **Reply #22 on:** December 03, 2008, 08:10:45 PM »

Can you go look?

BTW I picked up 2 78F motors, the cams def have more duration...

1080 · « **Reply #23 on:** December 03, 2008, 09:33:40 PM »

Yes Eldar, can you go and look? 12/77 date is important.

I wonder if there is any 12/77 with 90 degree number tag?

eldar · « **Reply #24 on:** December 04, 2008, 06:25:33 AM »

I will try to get a look tonight and see what I find.

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Author Topic: Late 750 engine with a difference. (Read 3757 times)

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