Bobdag
XS400 Member
Like the title says. The bike will only Dunn with the choke all the way out. By the way it's a 82 Yamaha 400 special 2 (400xs) the bike ran great before I parked it a couple years ago. I cleaned the carbs and had it running somewhat. I replaced the intake boots and did replaced the needle and seat, I set the floats to 1.25" as per the manual. It only runs with the choke all the way on. If I give it gas it cuts out then revs. The rpm's fluctuate at anything above 2000rpm. Any thoughts as to what it could be? Btw I checked and replaced vacuum lines and the crank case vent tube.