I've been pricing out the K&N air filter for my classic and it comes in at @ $100.00cdn has anyone just used one of the round k&N s suitable for Harleys or cars I noticed that K&N makes universal filters in various different sizes if anyone knows the part # that would fit the stock airbox let me know I can get one of those for about half the price at my local Canadian Tire store. They often have K&Ns on sale for 20-30% off but because they are an auto parts store K&N won't sell them any motorcycle filters except for harley filters they can get them other M/C filters can only be sold by motorcycle shops and they never go on sale. Any thoughts would be helpful.