Author Topic: Double final chain.......and a new project 750 K0 (Read 11094 times)

Sgt.Pinback · « **on:** November 24, 2015, 11:34:58 AM »

Picked up another CB750 K0 that comes with a double final chain.

Heared about that but never seen it.

Was this a common conversion in those days?

flybox1 · « **Reply #1 on:** November 24, 2015, 11:55:13 AM »

More pictures of this bike, please

Sgt.Pinback · « **Reply #2 on:** November 24, 2015, 12:30:59 PM »

Will have to do more pics.

Eagle landed last week.
Been in a farmers barn somewhere in the Black Forrest, out of use since 1977.

City Boy · « **Reply #3 on:** November 24, 2015, 02:59:16 PM »

Hi. The double row chain was offered in the 1970's to try to remedy breaking chains on the CB750.I would say they are an unnecessary power robbing option now as any premium 530 chain of today will handle any amount of power these bikes can muster.

Retro Rocket · « **Reply #4 on:** November 24, 2015, 03:53:10 PM »

Quote from: City Boy on November 24, 2015, 02:59:16 PM

Hi. The double row chain was offered in the 1970's to try to remedy breaking chains on the CB750.I would say they are an unnecessary power robbing option now as any premium 530 chain of today will handle any amount of power these bikes can muster.

The First 750 Honda I bought in 1979 had the double row chain and sprocket, they were common at the time, I remember seeing them at my local bike shop back then...

754 · « **Reply #5 on:** November 24, 2015, 04:28:22 PM »

If those are fold over clamps on the fork rubber, I can use them on my Ceriani..
Nice bike, is it two color or is that photoshop ?
What serial number ?...dont need last three numbers.

Sgt.Pinback · « **Reply #6 on:** November 24, 2015, 11:53:17 PM »

Quote from: 754 on November 24, 2015, 04:28:22 PM

If those are fold over clamps on the fork rubber, I can use them on my Ceriani..
Nice bike, is it two color or is that photoshop ?
What serial number ?...dont need last three numbers.

VIN is 160xx
So when was it made aprox. (there are no production stickers on German KO)?

That orange stripe was poorly made by the previous owner.

I think I can mount the genuine lamp holder and still use that Habermann handle bars (like them).
If so, you will get the clamps.

They will come with an old Ceriani sticker, mate.

(if you want it)

Sgt.Pinback · « **Reply #7 on:** November 25, 2015, 01:37:12 AM »

This is what I got.

dhall57 · « **Reply #8 on:** November 25, 2015, 03:18:06 AM »

Nice

Looks in good shape. How did you find it Sgt. Those KO side covers and air box look mint. If you decide to part this thing out I sure could use that KO air box. Just joking of course

I thought I knew the old Honda's pretty well but the double chain is new one on me. My original KO pipes are stamped HM300 only on all 4 pipes. My K4 and K6 pipes are stamped HMCB750 SR341,SL341, lR341, and lL341. But yours are only HMCB750. Is the HM300 stamp on the pipe but in a different area. Sgt. is your daughter going to want this bike once you get it back on the road

Sgt.Pinback · « **Reply #9 on:** November 25, 2015, 04:05:01 AM »

The right hand side cover has been painted and does not match to the rest.

The upper airfilter box has the usual cracks.

regarding pipes:

German, Netherland (and France?) K0 and K1 had "HMCB750" pipes.
Hard to find, as only 503 in total CB750 had been sold in Germany in the years 1969/1970 (K0 and K1).
I assume in Netherland even less.

Sound is similar to "HM300" but baffles dont fit. Hard to find. I am lucky to have a apare set of HMCB750 baffles

70CB750 · « **Reply #10 on:** November 25, 2015, 04:17:50 AM »

I like the double color.

I would just clean it well and kept it like this, original patina is great.

754 · « **Reply #11 on:** November 25, 2015, 11:42:36 AM »

Thank you on the clamps, if and when the time comes... And the sticker.. 754

Sgt.Pinback · « **Reply #12 on:** November 25, 2015, 12:19:57 PM »

You're welcome.

So here are the HMCB75O baffles.
Next weekend I'll start cleaning. But how do I get this engine clean?

Bailgang · « **Reply #13 on:** November 25, 2015, 02:37:59 PM »

I think CycleX still sells a double final drive chain set. Yep I just checked.

Sgt.Pinback · « **Reply #14 on:** November 30, 2015, 11:19:36 PM »

Started cleaning.
Had a rough cleaning of the engine with a little Kärcher.
Put the pipes off.
Polished some "8" srews and nuts. Learned, there are marks on the nuts.
Started to un-rust the fuel tank.
........

dhall57 · « **Reply #15 on:** December 01, 2015, 02:38:55 AM »

Sgt. the condition of those pipes look almost identical to the 341's that were on my K4. My pipes were solid just years of baked on oil and crud. A lot of elbow grease on cleaning and came out looking almost new

Im sure yours will to.

Sgt.Pinback · « **Reply #16 on:** December 01, 2015, 03:09:53 AM »

My wife gave me a great household product to get that grime off.

4 hors later, only little elbow grease, looks reasonable.

No. 4 pipe seems to have suffered from acid. I assume, that came from the battery.

AshimotoK0 · « **Reply #17 on:** December 01, 2015, 04:37:48 AM »

If you look in the Honda parts manual the German spec K0 exhausts had a different part number to USA or GB bikes. Probably something to do with emission control. The carb jet needles are different part numbers too.

Sgt.Pinback · « **Reply #18 on:** December 01, 2015, 04:47:03 AM »

As said the pipes are "HMCB750" and different to "HM300" and therefore have other part numbers.

As far as I know needles are different due to long high speed possibility on Autobahn.

Found very old tyres and an interresting item that I did not expect on this diecast K0,

Guess what:

oldhatt45 · « **Reply #19 on:** December 01, 2015, 06:45:40 AM »

Sgt

Pipes look like they came up really nice!
What product did your wife give you?

?

And the "guess what" answer from me is; Where is the Cotter Pin on the Axle Nut?

? and What is that Cap Nut on the Brake Rod supposed to do???

Charlie

Lostboy Steve · « **Reply #20 on:** December 01, 2015, 07:03:31 AM »

Quote from: City Boy on November 24, 2015, 02:59:16 PM

Hi. The double row chain was offered in the 1970's to try to remedy breaking chains on the CB750.I would say they are an unnecessary power robbing option now as any premium 530 chain of today will handle any amount of power these bikes can muster.

That's funny.... I couldn't imagine ever breaking a chain, they were really made that terrible? I did fracture a master link on a dt175 once but that was an old chain.

Sgt.Pinback · « **Reply #21 on:** December 01, 2015, 07:33:32 AM »

Quote from: oldhatt45 on December 01, 2015, 06:45:40 AM

Sgt

Pipes look like they came up really nice!
What product did your wife give you??

And the "guess what" answer from me is; Where is the Cotter Pin on the Axle Nut?? and What is that Cap Nut on the Brake Rod supposed to do???

Charlie

She gave me that cleaner. Normally, we clean the glass of our oven. That plus very fine steel wool did the job. Very easy!

http://www.ebay.de/itm/MELLERUD-Kamin-und-Ofenglas-Reiniger-0-5-L-/121534180033?hash=item1c4c006ac1:g:4nMAAOSw6aVUpr3h

I knew, someone would ask for the missing cotter pin. I already pulled it.
That ugly cap nut .... I didn't even saw it until now. Thanks.

The item I meant is that early KO chain tensioner (without hole).

Does anybody know until which VIN they used those?

Sgt.Pinback · « **Reply #22 on:** December 02, 2015, 12:23:37 AM »

Finished cleaning the pipes.

Certainly not perfect but I wont find new ones and this will not become a showroom bike.

dhall57 · « **Reply #23 on:** December 02, 2015, 02:28:33 AM »

Looking good Sgt.

SOHC4 Cafe Racer Fan · « **Reply #24 on:** December 02, 2015, 07:59:46 AM »

Much cleaner than any stock pipes my bikes came with.

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Author Topic: Double final chain.......and a new project 750 K0 (Read 11094 times)