SOHC.co.uk Forums > CB500/550
Genuine or fake? Your thoughts?
philward:
Thanks Ken, will check tomorrow
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Sesman:
Hi, Oddjob.
My comment was a question rather than a statement. We got there in the end though. It’s aLl very confusing for a newbie like myself, but comforted to know that the carbs are essentially the same, but with different jetting.
Just a little unsure now whether to retain and restore the 627Bs on the K2 or stick with the restored 069A units (100#; 40#) I’ve fitted. It also appears I have the correct 069A 98#:38# on my F2, which is a relief.
deltarider:
--- Quote from: Oddjob on November 01, 2021, 11:22:10 PM ---[...]
Not exactly correct, there are very small differences in some of the air vent sizes and air bleeds but they are not worth bothering with imo, mainly done for emission testing by the yanks and to suit the 4 into 1 system better. [...]
--- End quote ---
Can you be more specific? I have no source for that.
--- Quote from: Oddjob on November 01, 2021, 11:22:10 PM ---Phil if the bike was from somewhere in the states with thin air, like Denver for instance, the needle clips could have changed to accommodate this, always worthwhile checking.
--- End quote ---
A difference in the position of the jet needle is a difference in jetting, which will be expressed in a different stamped in number. Unless you know of exceptions ofcourse. It may be that the position of needles is changed in areas with thin air, but then, I take it, this has been done by local dealers after delivery.
philward:
Just re-assembled the carbs with all new Keyster parts - starts and ticks over fine but havn't had time to road test yet to see if hesitency cured (although starts much better).
But! I seem to have misplaced one of the zinc plated circular blank off the carb body (at top of carb). Probably find it in corner of garage in a few years!
Has anybody got a scrap carb that they could take one off and sell me? Carb is 627B Type
philward:
This is the one
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