99 Tcat had round slides. Changed it over to 2000 flatslides, now choking seems to have no effect. I put the roundslide back on, it starts and runs fine every time. Flatslides are clean and perfect. Same jetting and needles as my 2000 Tcat. Am I missing something simple here or what? He did not opt for a new singlenoutlet fuel pump and teed the three outlets on his old pump into one.