SOHC.co.uk Forums > CB500/550

CB550 First Build - Hondvarna?

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matthewmosse:
For cleaning up and removing bracketts I'd start by removing the brakett at a distance of about 5 -10mm using a cutting disk so as not to risk either cutting into the frame or wearing the disk out on the thick bit of weld, the grinding disk is far better and more cost effective to remove the welds once the bulk of the brakett is removed. For the final cleanup use a flap disk in the grinder. Having treated myself to a sabre saw from Lidl I'd really reccommend one for the cutting side of things, I was really pleased with the results the other day when I had to swap engines on my 125cc Honda rebel, the exhaust nuts were so corroded even a 9mm wall drive sockett didn't find any purchase at all, being flanged nuts they had gone pyramid shaped so mole grips couldn't get a decent purchase and a grinder would have been too close for comfort to the head and frame and exhausts if it could get near at all, I found it a doddle to cut the nuts diagonally through with the sabre saw though, then a simple job to insert a screwdriver in the slot and get things moving by giving a sharp tap. Nothing beats having the right tool for the job.

cinqmars2:
Yeah you're right, I should definitely be more patient and save for the correct tools.

Since the last update I took to taking apart my carbs. These came from the crash bike and I have no idea whether they it was a 550K or 550F. Does this make any difference? The carbs were badly oxidised inside, the brass isn't too bad but the jets were clogged. A little bit of rust in the bottom of the bowls too, but that was easy enough to scrub out with a bit of carb cleaner. I boiled the bodies for a couple of hours in lemon juice, vinegar and water to great results, any brass that didn't have rubber involved was also boiled with the bodies. Some cleaned up but others have debris in that I can't shift. I don't have access to an air compressor in the area but have read about using a softer metal to try and move any dirt in the jets, copper wire maybe. It's really not something I want to do so may just end up buying a rebuild kit. the only one I can find is from DCC which, of course, involved US shipping costs. I deem it well worthwhile to pay for it, but if anyone is after anything from them and can't justify the shipping, it may be an option to chip in on the same order...? Just a suggestion...

Looks right, anyone got any insight?

http://www.dimecitycycles.com/vintage-cafe-racer-caferacer-bobber-brat-chopper-custom-motorcycle-engine-parts-honda-cb550-carburetor-rebuild-kit-18-2422.html

matthewmosse:
k3 carbs are qute different and give better fuel economy than the f ones and I'm pretty sure the jetting is different as are the fittings for jets I think so I'd advise finding out before spending money. I've found the k3 jets block easily, Only other carbs I have had are the 500/4 ones that are thirstyer than my k3's but seem to not clog regardless - I've even had a set that were awsomely filthy work well enough to get an engine running on my workbench. Try NRP carbs in uk if you havent yet? It was a while ago but they were pretty confident they could get any carb parts even for the k3.

cinqmars2:
Ok, good to know! Do you think anyone would be able to identify the ones I have if I post a picture? I'll get some up when I get a chance, unless anyone can advise on any stand out features that would differentiate them?

Mitchv60:

--- Quote from: cinqmars2 on December 04, 2012, 10:15:30 PM ---Yeah you're right, I should definitely be more patient and save for the correct tools.

Since the last update I took to taking apart my carbs. These came from the crash bike and I have no idea whether they it was a 550K or 550F. Does this make any difference? The carbs were badly oxidised inside, the brass isn't too bad but the jets were clogged. A little bit of rust in the bottom of the bowls too, but that was easy enough to scrub out with a bit of carb cleaner. I boiled the bodies for a couple of hours in lemon juice, vinegar and water to great results, any brass that didn't have rubber involved was also boiled with the bodies. Some cleaned up but others have debris in that I can't shift. I don't have access to an air compressor in the area but have read about using a softer metal to try and move any dirt in the jets, copper wire maybe. It's really not something I want to do so may just end up buying a rebuild kit. the only one I can find is from DCC which, of course, involved US shipping costs. I deem it well worthwhile to pay for it, but if anyone is after anything from them and can't justify the shipping, it may be an option to chip in on the same order...? Just a suggestion...

Looks right, anyone got any insight?

http://www.dimecitycycles.com/vintage-cafe-racer-caferacer-bobber-brat-chopper-custom-motorcycle-engine-parts-honda-cb550-carburetor-rebuild-kit-18-2422.html

--- End quote ---

I don't know if this is any help but I've just had my carbs sorted.As I've never worked on the internals before I gave them to my trusted mechanic.He had to ultrasonically clean them 5 times just to get them apart,he said they where the worst he had ever seen.He then soaked them in used oil over night and then cleaned and stripped.
The emulsion tubes where rotten apparently,we used the service kit from davidsilver.He was impressed with the kit because he said normally you don't get half the bits in them.
Just finishing off the rusty cosmetic parts and then there done and back together.

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