"He runs only Dunlop tires and Harley conventional oil in his bikes"
and you see how crazy we all get over oil and tires?
I feel no need to experiment with using tires other then the OEM on the Road King, they deliver everything I want, longish life, good traction, good wet weather performance. Works for me,
Oil, never used a full synthetic in any motorcycle. For one reason only and that is, no reason too.
)
Though I dont use Harley Conventional Branded Oil because quite honestly I dont use it like I would not use any car, truck vehicle manufacturers oil, high dealer mark ups.
I do use Mystik 15/50 semi syn which is an HDEO. Harley oil is formulated like an HDEO and the Harley manual also says to use an HDEO diesel oil if HD oil can not be found. Amazingly, the Mystik oil is produced by Citgo, the same manufacturer that makes Harley oil.
I do use the Formula+ in the primary and transmission, no need to use anything else, bike shifts like a swiss watch, was just thinking that yesterday, did a 4+ hour round trip to the beach, freaking bike just runs awesome, amazes me all the time, ALL THE FREAKING TIME, average speeds yesterday, 2up, beach stuff packed on, straight interstate, 90+ degrees anywhere from 77 to 85 MPH, bike just barrels through everything.
Of course on the run home, hit the traditional thunderstorm and just keep moving, though I do slow down of course, yesterdays storm wasnt as big, lasted only about 15 minutes and its kind of fun when that happens, makes the ride interesting and cool, man it REALLY got cold for a while, then back into the heat, dried us off.
As far as your friend, well, Harley doesnt give me free motorcycles and I need to work to pay for mine *LOL*