I got the 30mm JRC carb for my SR. It's beautifully made and finished. I just checked it, bolted it on, and connected up the lines, and it started right up 2nd kick, and after about 10 seconds tweaking of the pilot and throttle screws it settled down to a beautiful smooth steady tickover. It's never sounded so good. Yes, I've yet to get it out on the road, but it's looking pretty damn good at this stage. I stopped and started it lots of times and it kept starting first kick and settled in to the lovely smooth tickover every time.