Hello. I am getting my bike (2013 DL650ABS) ready for the riding season although I ride whenever the weather here in SW VA allows. I am somewhat confused by all the info out there. I have 12,000 miles on the bike, bought new in September of 2013. I have changed the oil three times, filter once. I am going to renew the air filter and do a valve clearance check. I was wondering if you fellows could give me some input as to whether or not to change the spark plugs or not and do you all have suggestions (Part nos and manufacturers of Plugs, air filter, etc) as to the parts to be used. I am going to use factory parts or equal quality parts as I am not interested in any performance modifications. The bike is perfectly satisfactory to me as is. I am planning a few long trips for the summer and medium trips as mood strikes me. Thanks in advance for any tips.