daz.33: I know what you are going through: Two years ago, I bought an SRX4-3VN from a nation-wide reseller chain here in Japan. It ran like crap, and I took it back to the shop — twice. Both times they delivered it back as supposedly running properly. They even put it on a dyno in front of me and surrounded me with three uniformed company members to assure me that all was well. It was still on warranty, so they were obliged to get it right — except they didn't. So, I vehemently insisted that the carbs were wonkey. In desperation they showed me the computer maintenance log. It said that they had they had already overhauled the carbs — TWICE!
The solution finally came when I took it to another branch of the same chain and had an interview with the forman mechanic there. He was a solid guy, but at first he was inclined to take my words with the same grain of salt as the other people — until he stuck the exhaust sniffer up the snout ... smelled/saw how much raw fuel had mixed into the oil supply. That was when he came right over to my side, and asked me to put the machine in his personal care for a week. I knew what he was about, and yet I pleaded with him to make absolutely sure that he blew compressed air into every cranny after boiling out the carb bodies.
I collected the machine six days later. It ran perfectly. He showed me the nitrous oxide levels on the sniffer as proof. No BS this time. And thus it was the THIRD time the carbs had been overhauled. Part of the problem was contamination from the tank. (When you finally do get to the solution, put a fuel filter in the fuel line!)
I don't know if you can manage to get your carbs right, but it is apparently difficult to be 100% certain in regards to getting them squeaky clean. This problem drove me nearly insane, and it cost me a lot of time and fooling in the old around with needle settings on my own time.
The chief suspect should be the low speed circuit of the primary carb — if the SRX6 is configured in a similar fashion. Cheers and best of luck ... Lorne
