Monte, I ordered the seat cover from the TEAM folks in the original order back in 1997, but it does look like the seat cover available from Air-Tech, as Cliff mentioned.
.....a 2 into 1 exhaust system had been tried, but just doesn't work that well because both cylinders of the F-23 fire at the same time..
That doesn't ring true to me.
If both exhaust pulses occur at exactly the same time it seems a perfect oportunity to use an equally branched two into one pipe. Is your source of info credible? Am I credible?
Finally got around to customizing the F23 exhaust for the AirBike and it looks and performs noticeably better. Used a heavier gauge mild steel, made the angle 80 degrees vs the stock 90 degrees to fit under the fuselage, put in a flex pipe fitting to mitigate vibration at low rpm, and made the length from cylinder to tank wall the recommended 21". Much better! Over 48 hrs on this motor as of 7/5/18 and it's running great.
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