SOHC.co.uk Forums > CB500/550
Just for Starters !
K2-K6:
As a general rule on any carbs, if you turn the unit upside down and let the float rest on the inlet valve freely without pushng it down......then get a steel rule (starts from zero mm with no space before the scale starts) and put the end of it onto the surface which the float bowl fits to.......then read off in mm where the highest point of the float is.....then that's what the reference reading is talking about.
This is a default way of seting any carb IF no specific knowledge is available to suggest otherwise.
"local knowedge" or a specific manual would give more precise descriptions if there is a different system of markings/ geometry that is used.
Hope that gives you a starting method, maybe another contributor has more accurate info.
veefour:
Well i have decided to stop fiddling about & to make them easier to work on have removed the carbs from the bike. To do the job properly i have also ordered new jets / needles etc. from David Silvers. Also the floats look like they have been bent about a bit in their lifetime so am thinking of getting new ones of them also, i don't think DS have any of these ( will call them tomorrow ), but if not does any one know where else i could get them apart from paying the horrific prices some sellers are asking in the USA :o.
Although i bought the bike as one i could tinker about with it now looks like i might be having to spend a bit more cash than i anticipated. I did take the indicated ( not guaranteed ) milage of 2,600 with a pinch of salt :D although the Reg doc confirms the previous owner has only covered 150 miles in the 9 yrs he owned it ! Unfortunately the owner before him cannot be traced, so apart from knowing it was sold originally by Broomfields Motorcycles of Chelmsford & looks like NOO483P has spent its 36 yrs in Essex i cannot get any more info. about the bike, unless any one on here knows of course. ???
Bryanj:
Floats rarely need replacing, just careful attention to detail in getting them square to each other and on straight brackets. Worth polishing the pins so they move freely
veefour:
HELP, i have almost finished the carb rebuild but i have been & snapped one of the main jet retaining clips >:(.
I know these are hard to get hold of but does anyone have a spare one they could supply me with please.
Other than that i have seen something somewhere on this site where someone has done a modification using a spring !!
Cheers,
Dave.
veefour:
Well carbs all rebuilt & balanced, engine starts on the button & revs cleanly. Problem is when ridden the engine seems to be only running on 3 cylinders, the plugs are new & all have a strong spark. So, what do i try next new plug caps / HT leads, or could it be a faulty coil !! Any clues welcome please.
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