Honda-SOHC
SOHC.co.uk Forums => CB500/550 => Topic started by: Bookmark1 on March 13, 2023, 02:46:08 PM
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Does anyone recognise where this flimsy little spring may have come from - it seems to be left over on my CB550K3 rebuild.
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Looks a bit like a rocker shaft spring - hard to tell the diameter in the photo.
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Steering lock spring?
It might also be off the carbs especially if they are still the dreaded PD carbs, more springs than a mattress those carbs.
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The spring is very loosely wound and is 12mm in diameter and 15mm in length. The actual wire is very thin, only about a mil at most. It doesn’t look as if it can be a return spring but rather some sort of spacer/cushion 🤷🏻♂️
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There are springs very much like those fitted to the CB500K and CB550F carbs, they are fitted to the throttle lifter shaft. Have the carbs been apart, I'm almost certain I've seen that spring recently, just can't remember where as I've got so many parts disassembled at the moment.
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I'm thinking steering lock spring now - have you replaced it or had it in bits?
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I’m with Ken on the carb springs, it’s bob on from what I can see…..
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Carb lifter arm shaft spring. Thought the picture scale may be a little deceptive?
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Probably stripping Nigel’s carbs Ken?
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Got 3 sets of carbs apart ATM Phil, could be any one of them, I was cleaning those springs recently to get them ready for zinc plating so it could be that's where I remember them from.
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If that spring is parallel rather than conical I’m betting it’s out of the oil filter housing…maybe.
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Well done Oddjob and Ted. It is indeed from the old steering lock which I had to drill out due to there being no key. I have fitted a replacement so the spring is surplus to requirements (thank goodness).
As usual guys, many thanks for the help. This old thing is going to live again
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The bloke who’s laughing, is he the one who sold it? 😁🫣
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Haha Sesman. It looks as if he’s just told me it was running when he parked it up. Truth be told this bike was written off in a very nasty accident nearly 25 years ago. My mate who owned (and crashed it) sadly passed away at the end of 2021 and the bike was found tucked away in one of his sheds. I’m trying to get most of it (it needed a new frame and crankcase housing and various other bits) back on the road as a tribute to a very good friend as I’m sure he was saving it as a retirement project.
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Glad you saw the humour. Very best of luck with the resto and keep us all informed.👍
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That's a very noble cause, building a bike to remember your friend.
If I can help, let me know. The 550K3 shares an awful lot of parts with the CB550F2 in case you didn't know.
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This is it so far. New frame, crank casing, fork stanchions, fork ears (I might have bought them off Oddjob) and handlebars. Top end, all internal workings, engine covers, carbs, Airbox, wiring loom, fork sliders and rear suspension from the original bike. Wheels are stainless and have been built around the original hubs. I’ve had the tank repaired and resprayed along with the original side panels. sourced new mudguards, seat, clocks and rear light but I have managed to save the clock chrome casings, mounting plate, two indicators, the head light (God knows how it survived) and all handlebar controls. Although the finished article will be far from pristine I am considering getting a new set of pipes as all 4 of the original sustained a degree of damage ranging from cosmetic right up to that will never sit straight again.
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I think you did buy a pair of fork ears off me, remember that now. Not sure how you saved the clock bowls as they look a little worse for wear in the before pics.
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I see you've retained the dreaded PD carbs, I'd suggest you think about replacing them with the carbs off a 550F instead as they are known to cause problems down the line. Feel free to ignore this advice, it's your bike after all, just some words gained from experience.
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At the moment I want to use as much of Rob’s original bike as possible but further down the line I may make some changes. When he bought this bike I bought a 550F2 in that lovely deep burgundy colour so I’ve always actually preferred the F models.
The clocks themselves are second hand (at least) but amazingly the mileage is to within 2,000 miles of the originals. How’s that for luck.
As to clock cases, one was out of shape but after a bit of effort I managed to get it pretty straight and, with the aid of tin foil and elbow grease, got them looking really nice.
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Lovely to see the k3 progressing some great work going on there and some great work done. I have had mine for 35 years now and is now fully restored! (although still tweaking)😜
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Interesting back story about the bikes origins - sad circumstance that has led to your ownership of the machine.
It will be interesting to see how the final build reflects the bikes history combined with your motivation to achieve the end result.
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Is it not from the rear light bulb holder?
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That's looking really good,what a great job. Keep us updated on the progress, this is going to be quite a resto ;) :)