First no good at english. But here we go! 90˚ v2 270˚ 450˚ firing.crankshaft speed higher on 450˚ cylinder on intakte stroke.less Air in cyl 450˚ vith same manifoldvacum.lacy cylinder vith Carb,Rich fuel and lacy cylinder vith inj.on ny breva 750 i adjusted on exhaust temp.seems to work.tip to cold harted?? Breva 750. Turn tps against opening direktion.ca.2 mm on schrew holes by mine.chainsaw file in holes and just trying!kind of Old ways i Think.like to hear opinions on intakte Air vs manifoldvacum.cristmaslowe from denmark.