Hi all,
I have an '07 Super 9 AC that has been good to me, 15,000km good so far. Early on I played with the transmission; upgraded variator, stronger contra & clutch springs, played with the roller weights. I also put on a tuned pipe and opened the jet a little. It is pretty well dialed in and I can get it to top speed with consistent RPM's all the way through to about ~45MPH depending on the wind. (Speedo indicates 50 or more with needle to the M in MPH on speedo).
The next obvious upgrade would be a 70cc kit, pipe, and carb. But until then I was thinking of modifying the air coming into and leaving the carburator. I have an upgraded manifold that is a couple MM bigger in diameter then stock and noticed the hose from the airbox to the carb seems restrictive as well. I saw somewhere (yahoo groups?) a mod to replace that tube with a radiator hose.
My question is would opening the airflow to and from the carb a few MM provide any additional power? I have read the only restrictions to the AC in the USA is the speedboss, exhaust and air intake and not the CDI. The manifold I have is for/from a Canadian version of the S9.
Is this modification worth it? Obviously I would have to adjust the jetting........... just wonder what kind of (if any) performance increase should I expect.
