Honda-SOHC

General => New Member Introductions => Topic started by: kurienp on September 10, 2023, 10:34:36 AM

Title: Good morning from West Berkshire
Post by: kurienp on September 10, 2023, 10:34:36 AM
Hello all: a long time motorcycling guy, ridden bikes from 110cc, 225cc (hondas), to royal enfields and currently have a BMW 1200 on which I have had the good fortune to be able to do long distance travels (all the way to India). Happy to join this forum.

After having sold my offroad KTM 500, my heart now hankers to add a honda classic to the garage.

Been reading up quite some posts on this forum since I joined yesterday. On the lookout and trying to decide between a 400 or a 500/550 or a 750. Found a few seemingly good ones on eBay. Is there a checklist on what all to look for when buying a /4 as a long term bike? for example, one of the 500's I am looking at does not have a matching frame/engine number. Should I be concerned or is it that the honda's possibly never came with matching numbers?


For the money of some of the old 400/500/550, I can pick up a modern 1100 so wanted to ensure that I am getting a good one and a good deal.

I do the majority of my motorcycle maintenance myself, but currently not a case where I would want to rebuild one or have too much to do to it. It will be more of a regular maintenance and summer/club/DGR rides.

Inputs/Feedback much appreciated and hope to be able to contribute back to the forum once I am an owner.
Title: Re: Good morning from West Berkshire
Post by: Bryanj on September 10, 2023, 10:38:42 AM
Choice of which four depends mostly on your height and build.
400 is low and light 750 is tall and slightly top heavy, 500/550 is fast enough to get you a ticket.
All have there own quirks and things to look for and engine/frame numbers never match but should be in a range that people on here can verify
Title: Re: Good morning from West Berkshire
Post by: Johnny4428 on September 10, 2023, 10:49:41 AM
Hi and welcome to the forum. You’ve come to a great place for advice and help. Good advice from Bryan there. I have a 550 and a 750. Personally 550 better handling bike but love the extra grunt and power from the 750, but completely different bikes. Very popular on here too is the 400. Good luck in getting the right bike that suits you. And if you’re fortunate enough you can buy more than one classic. 😜😜
Title: Re: Good morning from West Berkshire
Post by: McCabe-Thiele (Ted) on September 10, 2023, 10:54:46 AM
I'm 6ft 2" and have a 400 that I rebuilt during the Covid period.
Great little bike but it's just to not comfortable for me to ride any distance as I have long legs so my hips are uncomfortable.
I've only ridden my 500 a short distance but its much more comfortable for my height.
Can't comment on a 750 - I sold my XJ900 as it was too heavy for me to put on the stand and move about in my garage as I aged.

Title: Re: Good morning from West Berkshire
Post by: kurienp on September 10, 2023, 11:07:16 AM
Thank you @bryanj, @Johnny, @ted.  (at the risk of making this sound like a partial tinder profile description), medium build, 80kgs at 5,11. If I can handle a BMW GSA decently, makes me want to go for a 750/4. The local garage has one 750/4 for sale, which they have refurbished with a top end rebuild and  some other generic stuff. It was their winter project and they just got it up to scratch. Most of the parts seem original, but then will need to give it a good thorough check. The workshop is a generic shop but I trust the guy to do a decent job on any bike.

As Ted also states, a 400 may be too light and small. Had a yamaha 125 2 stroke long time ago.  Had to be careful not to let it run out from under me  ;D

I am currently looking at a 500 with a spec listed as Frame cb500 1016689 and Engine Cb500e 1017038. Does that match up?
Title: Re: Good morning from West Berkshire
Post by: Nurse Julie on September 10, 2023, 11:09:22 AM
Welcome to the forum. Until recently I owned a 400/4, which was to small for me in size but great fun. I also own a 500/4 and 550/4, perfect size and plenty fast enough and handle fantastically. I also ride 750/4's, they are big and heavy, powerful for a 1970's bike and are great to ride, but they are now to heavy for me at my age to push around stationary safely.
Title: Re: Good morning from West Berkshire
Post by: McCabe-Thiele (Ted) on September 10, 2023, 11:58:59 AM
I found this site handy a link from a member on this forum.

http://cycle-ergo.com/
Title: Re: Good morning from West Berkshire
Post by: kurienp on September 10, 2023, 12:32:47 PM
I found this site handy a link from a member on this forum.

http://cycle-ergo.com/
Thanks Ted, most helpful.  Am narrowing it down to a 500/4.  Already have three points so better be careful now

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Title: Re: Good morning from West Berkshire
Post by: kurienp on September 10, 2023, 12:33:39 PM
Would the numbers below matchup?

Frame cb500 1016689 and Engine Cb500e 1017038. Does that match up?

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Title: Re: Good morning from West Berkshire
Post by: Athame57 on September 10, 2023, 12:42:18 PM
Welcome here mate, you're in good company!  ;D
Title: Re: Good morning from West Berkshire
Post by: Nurse Julie on September 10, 2023, 12:43:46 PM
Would the numbers below matchup?

Frame cb500 1016689 and Engine Cb500e 1017038. Does that match up?

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Yes, they are close enough for a CB500 K0. That doesn't mean the rest of the bike is correct though. Post a link or photos of the bike if you require any info.
Title: Re: Good morning from West Berkshire
Post by: Trigger on September 10, 2023, 02:36:15 PM
Welcome to the mad world of the SOHC, enjoy  ;)
Title: Re: Good morning from West Berkshire
Post by: Bryanj on September 10, 2023, 04:49:41 PM
Built round about 6/71 and numbers look ok, probably an import, yes i know all hondas are imports but i suspect this one went originaly to us.
As long as its registered its fine but k0 had a lot of unique bits, pictures help
Title: Re: Good morning from West Berkshire
Post by: philward on September 10, 2023, 08:40:04 PM
Welcome to the forum. I have both 500 and 750. Both have their own merits - 500 is smoother and easier to flick about (and prettier, in my opinion) - 750 (mine has a std compression 836 big bore kit) is more comfortable in modern traffic (obviously less revvy). I love riding both! I don't scratch about now so I don't reach either bikes handling limits.
Some really knowledgeable members on here who will advise on what to look for (and hear) - for example, the 500 doesn't have a primary chain tensioner and can catch the crankcase near an oil way sometimes. (I did 40,000 on my original 500 without issue, so not always problematic)
Not knowing your riding style, I'd ask the guy at your local dealer for a test ride?
Good luck in your search

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Title: Re: Good morning from West Berkshire
Post by: Oddjob on September 10, 2023, 08:57:57 PM
You can fit a primary chain tensioner in the engine Phil, IF you wanted to of course.

I think the 500 is a much better designed engine than the 750, they learned a lot when they built it and changed what didn't work very well for stuff that did IMO. Dry sump was a poor choice for instance.

I'm biased of course.
Title: Re: Good morning from West Berkshire
Post by: kurienp on September 10, 2023, 09:41:46 PM
Thank you all for your inputs. Here are some pics that I downloaded and put into an album - https://photos.app.goo.gl/8fsnV8AKStrHdN6y8

I was primarily looking at
- the colour - which looks original (maybe repainted, but original colours)
- the dials - again, look original
- the carbs and the engine - engine has been rebored, new pistons.  It has had a new clutch plate , chain and sprockets (from David Silver ... who else!)

I like ones in green or red, but not a deal breaker.


Title: Re: Good morning from West Berkshire
Post by: Nurse Julie on September 10, 2023, 09:54:39 PM
My first question would be why has it had a rebore and new pistons at only 10,000 miles?
Yes, it's a USA import.
Title: Re: Good morning from West Berkshire
Post by: kurienp on September 10, 2023, 10:04:40 PM
agree. But as I am not planning to hoon about on it and if the work has been done to a good standard, anything else I need to watch out for?  I am planning to go and listen to the engine. It is a way bit far away ... but willing to travel for a good bike. If I don't go and look, will never get to know.

Anyone selling a red 500/4 or a 550/4? :D
Title: Re: Good morning from West Berkshire
Post by: Nurse Julie on September 10, 2023, 10:08:41 PM
The 500/4 never came in red. The CB550 F1 comes in orange and the F2 comes in a dark Metallic red. But, I would still want to know why the bike needed a rebore 🤔🤔🤔🤔 Is there proof that the bike has only done 10,000 miles?. It could be a 60,000 mile bike with just another speedo fitted.
Title: Re: Good morning from West Berkshire
Post by: McCabe-Thiele (Ted) on September 10, 2023, 10:11:09 PM
Imho any bike that has only done 10k miles in around 50 years has only averaged 200 miles a year so plenty of scope for corroded bores might be it's the mileage covered since restoration .
More likely it done probably  decades of no miles so all that standing will have taken its toll on the bores.

If it runs okay & the price is right I would discount the recorded mileage and judge it on condition.
Title: Re: Good morning from West Berkshire
Post by: Bryanj on September 10, 2023, 10:45:57 PM
Those are not clocks from 72, faces in far too good a condition, definately a K0 with several K0 only features, would need to see seat lock, rear light and multi block connectors under lh side panel for more details.
Depends a lot on asking price
Title: Re: Good morning from West Berkshire
Post by: Nurse Julie on September 10, 2023, 10:52:55 PM
Those are not clocks from 72, faces in far too good a condition, definately a K0 with several K0 only features, would need to see seat lock, rear light and multi block connectors under lh side panel for more details.
Depends a lot on asking price
I can see the seat lock Bryan, it's the correct K0 type. Maybe the clocks have had new faces.
Title: Re: Good morning from West Berkshire
Post by: Trigger on September 10, 2023, 11:22:02 PM
Defiantly had a respray as the tank strips are too close to the badges  ;)
You must look past the bling and make sure it has all it's correct parts fitted.
Title: Re: Good morning from West Berkshire
Post by: kurienp on September 11, 2023, 07:24:57 AM
Defiantly had a respray as the tank strips are too close to the badges  ;)
You must look past the bling and make sure it has all it's correct parts fitted.
Wow! Amazed at the depth of knowledge on here!

What will be a good price to pay for a bike in this condition? The current asking price is 6.5 k. High in my opinion. 

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Title: Re: Good morning from West Berkshire
Post by: Trigger on September 11, 2023, 07:35:17 AM
Price depends on how good it is. You can not go from pictures as, i can make myself stunning in a picture but, i am one ugly barsteward  ;D ;D ;D

https://www.carandclassic.com/auctions/1971-honda-cb-5004-nPP95n?bsft_aaid=a5ce63ed-6419-48b8-adb6-8692f74daf04&bsft_eid=0eb71092-f06a-4366-821c-eaf920e7faa5&utm_campaign=targeted-sell-motorcycle-21-04-23&utm_source=blueshift&utm_medium=email&utm_content=sell-saturday-email-22-04-23&bsft_clkid=41f418cb-640f-4077-9211-e17b1f6198ce&bsft_uid=7aa14b49-b967-44ce-a87f-fa192e89e8c4&bsft_mid=4776c13b-66e7-4075-84c8-5da46d9fe911&bsft_mime_type=html&bsft_ek=2023-04-21T07%3A31%3A40Z&bsft_lx=12&bsft_tv=18
Title: Re: Good morning from West Berkshire
Post by: kurienp on September 11, 2023, 08:02:10 AM
Price depends on how good it is. You can not go from pictures as, i can make myself stunning in a picture but, i am one ugly barsteward  ;D ;D ;D

https://www.carandclassic.com/auctions/1971-honda-cb-5004-nPP95n?bsft_aaid=a5ce63ed-6419-48b8-adb6-8692f74daf04&bsft_eid=0eb71092-f06a-4366-821c-eaf920e7faa5&utm_campaign=targeted-sell-motorcycle-21-04-23&utm_source=blueshift&utm_medium=email&utm_content=sell-saturday-email-22-04-23&bsft_clkid=41f418cb-640f-4077-9211-e17b1f6198ce&bsft_uid=7aa14b49-b967-44ce-a87f-fa192e89e8c4&bsft_mid=4776c13b-66e7-4075-84c8-5da46d9fe911&bsft_mime_type=html&bsft_ek=2023-04-21T07%3A31%3A40Z&bsft_lx=12&bsft_tv=18


Oh wow! Compared to that, this looks like a steal.

Again, the key is, what do I want it for - as a bike to just use a few times a year, in which case anything will do (but then 6.5 is expensive), or look at it as an appreciating classic? In case of the latter, it makes sense to pay money to get something original-ish.

I am more in the former camp.

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Title: Re: Good morning from West Berkshire
Post by: kurienp on September 11, 2023, 08:37:34 AM
Looking for my early morning fix - found this excellent resource on here that I had missed out on earlier ! - http://www.sohc4.com/cb550/cb500/ and http://www.sohc4.com/cb550/cb550/

Now to sneak some time into reading between work today  ;)
Title: Re: Good morning from West Berkshire
Post by: Nurse Julie on September 11, 2023, 08:46:49 AM
Looking for my early morning fix - found this excellent resource on here that I had missed out on earlier ! - http://www.sohc4.com/cb550/cb500/ and http://www.sohc4.com/cb550/cb550/

Now to sneak some time into reading between work today  ;)
Yes, good info but, that is only relevant to USA models (which is OK for you as you're looking at a USA model). But the info is totally incorrect for the rest of the world models, including UK models.
Title: Re: Good morning from West Berkshire
Post by: kurienp on September 11, 2023, 09:10:09 AM
thank you ... that is good to know - and after my morning coffee, only now realised that, that is a different domain - sohc versus sohc4.

Any similar site for UK models? There are some good concourse type models which look attractive at a better price than the link Trigger posted on earlier.  Decisions decisions decisions ...
Title: Re: Good morning from West Berkshire
Post by: Nurse Julie on September 11, 2023, 09:15:40 AM
No, info on UK model CBSOHC/4's is sparce to say the least. You will learn more from owners of UK models on this forum than you ever will do from the Internet.
Yes, SOHC4.net is very closely linked to the UK Forum. Most of us belong to both.
Title: Re: Good morning from West Berkshire
Post by: McCabe-Thiele (Ted) on September 11, 2023, 09:24:59 AM
thank you ... that is good to know - and after my morning coffee, only now realised that, that is a different domain - sohc versus sohc4.

Any similar site for UK models? There are some good concourse type models which look attractive at a better price than the link Trigger posted on earlier.  Decisions decisions decisions ...

If you trawl the internet looking at e-bay, auto trader & using Mr Google you will find a variety of 500's up for sale both private & trade. We have had the occasional members here put theirs up for sale here but its probably only a few each year.

This site is mainly about restoration, maintainance & problem solving with members who have a vast weath of knowledge  & experience.

I am not quite sure if you are looking for originalaty/ concourse with an eye on investment or a nice looking bike that has had a decent engine that you can use in the summer.

The range of asking prices & auction prices are vast. As you will probably know most restored vehicles cost more to build  than their market value.  High quality restoration is not generally a money generating exercise  except for the few.

All that glitters is not gold so its always going to be a risk buying something 50 years old at any price.

Title: Re: Good morning from West Berkshire
Post by: Oddjob on September 11, 2023, 09:28:16 AM
Pity the pics are so blurry but for me the chrome tank trim is not original, can’t see the joint trims and the master cylinder looks too tall as well. Maybe off another Honda like the GL1000.

Not 100% sure it’s starlight gold as well, looks like candy gold which of course is incorrect for a K0. Looking again, it might be starlight, shame the pics are so poor.
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