Not quite correct Frostyboy. You can't use a 530 O-ring (to wide, case damage), but you can use a 520. This does require new 520 sprockets though.
I've never been able to locate 520 sprockets for the 550.
Any tips there?
The rear I'm using came from SprocketSpecialties (38T alloy), the front is a custom 17T. Basically a stock CB550 530 remachined for a 520 width chain, although not quite that simple. You can also use an XL (?, have to check the notes

) 16T on the front. I went 17/38 to get a bit more initial accel., without killing the top end. This also leaves the option of going 16T front for the stop light wars, without having to mod the chain.

I hesitate to suggest this. But, it is possible use a 530 Oring chain if you offset the front sprocket 1/8 inch.
But, oring chains are heavier and stiffer than standard chains. Basically, it eats up more HP from whatever your bike makes.
If you are going for a long distance marathon, maybe the trade off is worth it to you.
Just saying...
You could offset (have to do the rear to match), but that would require a custom sprocket, as moving the stock one out board would cover the fixing groove in the splines.
Like anything else, not all o-ring chains are created equal. I should explain that I went 520 o-ring for specific reasons. 1st o-ring because my experience is that they run cleaner, and longer when properly maintained. I plan to continue showing the bike, so reduced cleaning is a priority. 520, because it weigths the same or less than a stock 530, and that's the largest size that will fit a 550. The chain I'm using was developed for MX racing, and low friction was a priority. I won't quote the manufactures hype, but this is the link to their tech stuff -
http://sidewindersprockets.com/v-series_smart_chain.htmlDoes it eat HP, guess maybe I should throw a standard 520 in the box TT, for when I take the 550 to the dyno for jetting. For sure if I was racing it, there would be a standard 520, racing quality chain on it.
Cheers
