My gripes so far are that the bike started out smooth, but seems to be getting buzzier. And the stock seat is hard. And if only the bike was a 750cc. 300+ mile rides it needs to be a bit more comfortable. Great bike other than the above. The motor can be upped to Gladius specs, but it will cost ya. You could spend $1500 on the motor to get another 7-8 hp out of it.