SOHC.co.uk Forums > CB500/550
POINTS TIMING CB500/4
Bryanj:
550K3 float height 14.5mm and the pilot jets need the cross holes super clean as well as the main hole.
There was also a bulletin from Honda dated 01-09-77 saying that some K3's had the needle clip in the wrong position causing blueing of the original pipes----should be middle notch but was found to be second from top
Oldbuthopeful:
Thanks BryanJ - only just picked up your post.
My 550K was first registered July '78 so I would hope any needle setting problems would have been overcome by then,
but when I get the carbs off I'll check to make sure.
Your float height comments were very welcome as, by chance, mine have been set at 14mm !
Thanks again for the help.
Paull:
I have boyer on my 550 chop and it runs like a scolded cat, I will run out of balls before the bike does.
My Mate said, when I went past him at 80 I mean 70, it sounded like he had a cat stuck in his back wheel and then this red bullet screamed past.
Starts first push of the button.
Paul
z1100r:
Have you sorted it yet...?? Is it purring away like a little sewing machine again...??
I took my 500 out the other day. I was surprised that it took me 3 or 4 miles to get used to it. Been using using my Thunderace as dailly transport I guess, so going back to the apehangers and upright position seemed alien for 2 or 3 miles. Soon got used to it again and started enjoying it. Got to keep riding it, I dont want my nice spangly new carbs gumming up.
My float heights are 14mm aswell...I always set them on the rich end of what the book says. 14.5 +or- 1mm.
My needles are the 50's not 49's and are in the middle groove. The 50's i think are thinner at the top (richer) for initial pickup, but the same as the 49's after that.
My bike is a bit weird as its a 500 chassis, with 550K3 engine bored to 601cc using +0.050 GPZ305 pistons with K3 carbs on modified 500 airbox (The bottom of the box is cut out for extra air). Had to buy Longer 550 rubbers from states. Main jets are 112.5 (std are 90's). Head and manifolds are gasflowed and valves are bigger. With the race cam it used to rev to 12,500rpm but with a stock cam its only 10,000 but with more grunt.
Even with all those mods its on stock points ignition/timing (std cam) with only main jet changes to the carbs. Primary jets, slides, needles float heights etc are all totally stock and it runs perfect.
Dont forget to balance your carbs.
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