I hope others will chime in, but my initial guess is the carb isn't set right or is dirty. It could be a float problem. Mine will pop and sputter when cold and has done so for over a year... but once it's warm, it's fine.
If you're comfortable working on carbs, I can tell you how to get the machine apart to get to the carb. Having to wait a couple of weeks to get your brand new machine working right is a load of crap. Are there any other Yamaha dealers near you?
Rob
If you're comfortable working on carbs, I can tell you how to get the machine apart to get to the carb. Having to wait a couple of weeks to get your brand new machine working right is a load of crap. Are there any other Yamaha dealers near you?
Rob