Author Topic: CB550K Needle Position  (Read 2018 times)

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Offline HondaMan

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Re: CB550K Needle Position
« Reply #25 on: August 26, 2025, 08:55:45 PM »
Hello HondaMan I Purchased them on ebay from a guy named georgefix out of Daytona but it looks like he may be out of stock unfortunately
George is a great guy. He sells K&L not J&L kits.
Sorry I ment K & L not J & L thats what happens when you get old LOL

Ah, that's just as good info!
There's currently just those 2 brass makers out there (non-Keihin) for the 500/550 that I've found. in recent years I've received carbs for rebuild from supposedly running 500/550 bikes (022/A carbs) that had the K&L brass, and the owners later reported the bikes were running, which was good news. In the 750 the K&L & Keyster parts are a troublesome swap because they are calibrated way differently (thicker needles, larger emulsifier throat holes, varying aeration holes and different jet numbering). They can eventually work, but it takes some fiddling. I haven't yet seen the 750 come out as well with those parts as with the Keihin, though, and it's all done by "feel" to get there. For example, in a 750 with roundtop carbs it took #140 mainjets (normal would have been #105-#110) and needles in position #5 (instead of #3 or #4) to get the [successful] bike to run to 90 MPH, which was enough for the owner. It would have been 100 MPH+ with the Keihin brass, but the owner was only an in-town rider, so it was OK for him.
See SOHC4shop.com for info about the gadgets I make for these bikes.

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