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CB550 First Build - Hondvarna?

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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.

cinqmars2:
So, it's been a long while since my last post, and there is really nothing to report since that time...

With my last day of Christmas and New Year freedom before going back to work, I took out each and every part and catalogued them all. I photographed everything and have noted down all parts and their condition.

The main thing for me, is the idea of combining parts from the two engines I have.

The original (Engine 01) has been promised as a good runner.

The second (Engine 02) has been partially dismantled, cylinders off etc, crank case and gearbox intact.


Engine 01 has a few chipped fins and a couple of cracks, but supposedly works as it is. Engine 02, although rattier, is complete with no cracks at all. Would it be advised to replace the damaged parts of Engine 01 or would it be best to keep a run-in engine together as a whole? Could there be wear variation between the two that would cause more problems? Or should I focus on just rebuilding Engine 02 and make that my primary?! I could split the case, get it media blasted, painted etc as it's already half disassembled?
Sadly the only box of parts I haven't documented yet is the one containing the cylinders and head from Engine 02. Will get round to that tonight.

cinqmars2:
Some photos of Engine 02.

cinqmars2:
Also some photos of my carbs for help with identification  ;)

This is after a good lemon juice + vinegar cooking, all need a full rebuild.

Bryanj:
Those carbs are the same as fitted to all 500/550 EXCEPT the K3, and whilst they runn richer are far easier to stip/clean/get parts for

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