New to the forum so if this isn't the place just say so. I have a 1996 Beta Techno Trials 250, recently purchased and learning the trials thing. The bike runs excellent with the exception that it four cycles anytime that it isn't under a serious power demand. I think that the bike is bone stock ( according to the previous owner), the spark plug runs with a nice tan color and doesn't foul out. The engine has loads of compression and power. The MC1 that I am running at 50 to 1 has always worked for me with no difficulties. I did drop the needle 1 step with no results. My feeling is that the trials bike needs to hit right off of idle for instant power, mine is like it is loaded up but doesn't belch out the smoke. Maybe this is how it is supposed to be but I think it should hit sooner. Open for suggestions.