Honda-SOHC
SOHC.co.uk Forums => Project Board => Topic started by: Trigger on April 02, 2022, 10:46:48 PM
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I have been fortunate to own two of these now. The first one a did about 6 years ago and i was lucky to pick another one up.
I have spent a bit of time on this and it has more Honda NOS parts which include , Clocks, seat, headlight bracket, switch gear, headlight and so on. Just waiting on the tank and panels to come back from the painter and she will be finished.
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and more
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Stunner, nice one Graham. Love it 8)
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That’s one smart looking restoration. Looking forward to see it with tank and side panels.
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Looking good :)
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Looks very good
Sent from my SM-A750FN using Tapatalk
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Lovely job Graham. Who's doing the paintwork?
Is this going to be a ride or sell on?
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Very nice looking bike Graham - as always keeping the bar raised high.
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Another good one Trig, like it.
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Wow looking great Graham. Any history of when/where it was sold in UK.
The NOS seat doesn't look very puffy in the quilted panels but Jason's (Woodside) NOS K0 seat was similar and also one that ChrisR imported for his K0. Mine that DS sold me is really pronounced but that was a dealer-take-off I think. Mine was welded together (sides to top)...no stitching but my original one was stitched. Perhaps it was sourcing from different factories and some had more pronounced quilting. You can see on SteveD's US K0 seat that the rear section is more pronounced than the front ... presumably from the riders bum flattening the foam in the cover.
I watched a car resto programme last week where they took a soggy seat to Aldridge trimming in the midlands and they used steam to rejuvenate the foam. I wonder if it would be possible to inject steam into the 'panels' of Honda covers to rejuvenate them.
https://www.youtube.com/watch?v=x0yUYFkPxX0
https://www.google.com/search?q=rejuvenating+seat+foam+with+steam&rlz=1C1CHBF_en-GBGB903GB903&oq=rejuvenating+seat+foam+with+steam&aqs=chrome..69i57j0i546l3.19854j1j7&sourceid=chrome&ie=UTF-8#kpvalbx=_iuFJYsmfIfG68gLjoJH4Cw12
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Seats in the UK were the flat type compared to some in USA market. I have one of those steamers but, it only gives the foam a lift and i would only use it on a seat that is stripped down. They do use a fair amount of water which would only drip down and sit on the inside of the seat pan ;)
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Great to see a smart K0 with just about all the right bits including the rare switches. I got a NOS right one cheap but have had to compromise on a left one off a CB125 I think that is for external wiring. Have you got the mirrors?
The seat foam on mine crumbles through the holes and seems an insurmountable problem.
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That looks great Graham - is it going to be gold?
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Looking as good as new Graham 8) ;D
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It will stay it original colour of black Phil.
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Great to see a smart K0 with just about all the right bits including the rare switches. I got a NOS right one cheap but have had to compromise on a left one off a CB125 I think that is for external wiring. Have you got the mirrors?
The seat foam on mine crumbles through the holes and seems an insurmountable problem.
Yes, not easy to get the correct switch gear for these UK units. Have some mirrors somewhere and will have to hunt them down. If you take your seat cover off, you can put a thin layer of foam on the pan to stop the crumbling foam from escaping in to the air filter. I did it on a seat many years ago and it worked well ;)
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Never seen a PA switch on a very early 70's Honda .. Cool !
What's the Part no. Graham?
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Never seen a PA switch on a very early 70's Honda .. Cool !
What's the Part no. Graham?
Only fitted to UK and some european models. Was also fitted to the UK CB750 K2, not sure about the UK CB750 K1, as i must of built more than 25 750K1 engines but, never a bike. P/N is 35250-323-013
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Never seen a PA switch on a very early 70's Honda .. Cool !
What's the Part no. Graham?
Only fitted to UK and some european models. Was also fitted to the UK CB750 K2, not sure about the UK CB750 K1, as i must of built more than 25 750K1 engines but, never a bike. P/N is 35250-323-013
Was in scan of Bryan's JDM 03/71 Parts Book, so I guess used on the Japan version too.
[attachimg=1]
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A year on from our last post ( I can't believe another year has gone by), the CB500 K0 UK model is now for sale.
Here's a few pics of it now finished. Full build photo portfolio and parts list available along with other pics of the completed bike.
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Beautiful.
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Horn cover is on wrong Julie, the hole you can see goes at the bottom for water drainage. I'm doing mine now which is how I spotted it.
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Horn cover is on wrong Julie, the hole you can see goes at the bottom for water drainage. I'm doing mine now which is how I spotted it.
Thanks Ken, I will put it on the other way up.
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I'm looking at the horn now Ken, if I turn it round so the small hole is facing downwards, the opening for the power cable will be in totally the wrong place 🤔🤔🤔 I'll have to have a closer look later.
[attachimg=1]
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And the fiché shows it the way I have it fitted.
[attachimg=1]
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If you study the pic Julie you can see the hole at the bottom, it's hard to make out but it is there.
Just checked mine and it's exactly the same as the pic, 2 small crimped areas for the locating lugs on the horn and the hole at the bottom about 1.5 inches away from the left hand crimp. When fitted to the horn it locates with the hole at the bottom and the horn wires coming out about 10 past.
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Looking at your pic of the horn in close up shows your cover is crimped on both sides of the hole, mine isn't.
IIRC the horn is a 750 so I'm wondering if the part number changed for later models. Mine is off a K1.
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This item appears to supports Kens comments - cable at 10.00 O'clock hole at bottom.
.https://www.ebay.co.uk/itm/194253306652
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This item appears to supports Kens comments - cable at 10.00 O'clock hole at bottom.
.https://www.ebay.co.uk/itm/194253306652
That's a very modern horn Ted as the bag has one of those fancy bar code scanning things (I can't remember what they are called now 😂😂😂). Anyways, the one on the K0 is an original K0 horn, not an up to date or superseded one. I've looked at the cover again and there isn't a hole in the bottom, only the one at about 9 o'clock with the cable entry at about 2 o'clock. It's exactly the same as the one I posted a photo of earlier from CMS for a UK K0 and it can't fit any other way, I've just tried 🤔🤔🤔
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There is no superceded part number for the horn on the K0 Julie, it's always been 38100-300-023, ( I have a very old parts book for the 500, early seventies and it's that part number in there, be interesting if Bryans K0 parts book says something different I suppose) there are though other horns that look the same fitted to other countries, 38100-300-621 for France and 38100-341-630 Euro direct. The later now supercedes to 38100-300-023 but interestingly the French horn ;D ;D looks to be the same as yours Julie, not the horn itself, which for some unknown reason looks to be grey where the normal one is black but the cover itself. https://www.cmsnl.com/honda-cb500k0-four-france_model14655/horn-assy_38100300621/ I've also found that if the part number is exactly the same so is the part, doesn't matter if it has the modern part number sticker or the older paper part number inside the bag, made to the same specs as the original.
Look at the hole, it's at the bottom BUT it has 2 crimped sections either side of the hole, the 023 part number does not. It also doesn't appear to be chromed like the 023 part, I'm wondering if the cover has been replaced due to corrosion issues before you bought it. I can 100% testify that my horn I'm currently restoring is original, I've had that cover rechromed before as they tend to get fairly rusty and spotty for some reason, maybe it's the location. Also notice the french version doesn't have the separate earthing wire like 023, I wonder why Honda did that?
Doesn't really matter either way, just thought I'd mention it, the hole makes 100% sense to go at the bottom or it would collect water otherwise and corrode it from the inside out but it still looks the part so no harm done in the end.
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Many parts don't make sense with the UK K0 parts Ken. We have had 2 NOS OEM brake rods, both the same part number, both in identical bags but one was black and the other was silver (BZP). The same applies with the rear sprocket cover for the K0, both same packet and part numbers, one black, one BZP. I know for sure this horn is original to the bike. What isn't original, is the master cylinder cap fitted on the bike, it's now been changed for the correct, original concave cap 😊😊😊😊
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Just looked at my 7/71 all original K0 horn. Wiring cut out between 2 & 3 o/c, hole at 6 o/c, one crimp at 10 o/c (and two other crimps at about 3 o/c and 4 o/c) Noticed a couple of other things, but it's still a beaut!
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Early sandcast CB750 horns were fitted on the left side of the bike, were under part number 38100 - 300 - 013 and had the cable exit at the left side and that drain hole at the bottom (as your cover would be were you to re-fit it with the drain hole at the bottom, Julie). I also THINK the same chrome horn cover was used on some of the CB250 / 350 twins of the time. Is it possible that the chrome cover is not actually the one that was fitted in the factory, rather something that a previous owner has changed and which actually came from a different bike?
As to the black zinc finish that comes on some parts that were originally just a bright silver zinc finish, I suspect they are just later spares production pieces - Honda were using black / drab olive zinc as standard on some parts on the 750F2 of 77/78, and much more extensively in the years that followed on some models and really were not all that bothered about as to whether the surface finish on "spares" parts was exactly as per original; the part would do the same job irrespective of finish.
Nice bike by the way.
Chris R.
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Thanks Chris. The house will look empty of bikes when you next pop in for a cuppa. I can see the floors in all the rooms for the 1st time in years 😂😂😂😂. Not sure I can get used to not tripping over bikes 🤔🤔🤔
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You cant have that Julie, Graham needs the tactile feel to get around
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Just looked at my 7/71 all original K0 horn. Wiring cut out between 2 & 3 o/c, hole at 6 o/c, one crimp at 10 o/c. Noticed a couple of other things, but it's still a beaut!
Sounds exactly like mine. One crimp at 10, one at 4 and one at 5 and the hole at 6 approx. My cover has a slight split on the crimp at 4 o'clock so I bought a new horn today just in case. Managed to find one cheaper than the normal price.
Ds one for sale with a dent in the cover and believe it or not but it's more expensive than an undented one, weird.