K&N has always ended up giving such problems but it could be some other issue too such as an unclean carburetor.but first remove the K&N and put the stock filter and ask the SVC to tune the engine to its stock.if the problem still persists the get the carb cleaned too.
Im not sure about the model name but i think its CRUZE.anyway doesn't matter because there are only 4 types of helmets from CROSS.Half face,MTX and 2 types of full face which cost 2k and 3k...the model name is to only differentiate between the graphics.