SOHC.co.uk Forums > CB500/550
CB550 K3 custom project
thomaspigeon:
Hey,
So I tested the plug caps + coil resistance
Plug caps are at 4.5/ 5K ohms so that should be ok
Coil resistance is at 25K ohms for both so all good on that side!
I’m waiting for the new spark plugs to arrive now. Should be on Thursday.
Now I figured another odd thing with the carbs. I tried to sync the sliders with drill bits. But when I open the sliders fully, I always have a gap with carb #2 and #1, the 2 others looks fine. Could you have sliders lifting up at different speed? I should probably create a topic about this.
Thanks
Tom
McCabe-Thiele (Ted):
Okay I'm new to this forum but did you check the sliders before you reassembled the carbs on the inlet manifold. It sound to me as though you have sticking sliders near the top of the travel could be muck in the carbs or check the links at the carb top where the springs & little T shaped rods are.
I did the drill bit initial setting on mine and they all fully opened from the throttle action. Is there an issue with the two cable adjustments preventing the throttle from fully opening ? Are you sure you put the T shaped rods in the right way up they seem to act like a pushrod for the throttle movement?
thomaspigeon:
Actually I start to have a massive doubt about my multimeter reading. I’m pretty bad at it
I attached a photo of the reading of the coils HT
What are your thoughts?
@macabethiele I’ll have a look tomorrow at this
McCabe-Thiele (Ted):
--- Quote from: thomaspigeon on September 07, 2020, 04:10:46 PM ---Actually I start to have a massive doubt about my multimeter reading. I’m pretty bad at it
I attached a photo of the reading of the coils HT
What are your thoughts?
@macabethiele I’ll have a look tomorrow at this
--- End quote ---
Have you checked the battery in your Multimeter I had to change mine after a couple of years use .
Are you getting a good fat visible spark when you check it with a loose spark plug ? Don't forget you get the extra sparks on the other cylinders as there is no distributor fitted.
thomaspigeon:
@macabethiele I found the culprit, it’s the arm set link that got more play on carb on 1 & 2 not sure if I’ll change it for the price! https://www.cmsnl.com/honda-cb550f-super-sport-550-four-1976-usa_model467/arm-set-alink_16018323004/#.X1oSxyV4WEc
@julie, I’ve set up the float height following your topic but its overflowing quite a lot on 2 of those. I’m really desperate with those carbs. They are from a cb550 f1 so the height should be 22mm and I made sure both sides of the float were level.
Maybe my overflowing pipe too low for some reasons as I’ve seen they were slightly bent, all the bits inside are new so that can’t be this
The carb reference is 069A Keihin
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