well the dealer guy can't recreate the problem. During my 25 mile drive to the dealer it sputtered and bogged about 4 times when going around 40 mph and twisting the throttle on slight inclines, it slowed down to 35 where I pulled over and then took off again slowly where it didn't act up for almost 10 miles. Im talking to the manager tomorrow about having them trying a carb from an other scoot to try??? Otherwise I'm bring it home and figuring it out myself, figured if it has a warranty why bother but they are a bunch of idiots. Where should I start? I'm thinking of ordering a new carb with a jet kit and a cdi to throw in. The spark-plug appears a whitish brown?