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HD's crap oil was only in my bike until I ran Mototune new-engine break-in...then swapped to M1 20w/50 v-twin synth & swap it every 5K (w/filter, of course).
No need to do every 5k for primary and tranny unless you have to much money or to much time. Or you enjoy overkilling.
10k for primary, 20k for tranny.
ninetyzero, I change all three holes at 2,500 miles for the same reason you lock your house doors. It is good for you mental health but doesn't really make you any safer.
7 Surprising Harley-Davidson Products that Are Not Motorcycles
Slideshow: The bar-and-shield logo shows up on far more than motorcycles, some of the company's most unexpected products have nothing to do with riding.
Slideshow: From the troubled AMF years to modern misfires, these bikes earned reputations for reliability issues, questionable engineering, or disappointing performance.
Crazy Bunderbike Build Looks Amazing, But Is It Impossible to Ride?
Slideshow: The Swiss custom shop has taken a Harley Softail and stretched it into something so long and low that it looks closer to a rolling sculpture than a conventional motorcycle.
Engraved Rebellion: Inside Bundnerbike's Glam Rock II
Slideshow: A standard cruiser becomes an intricate metal canvas in the hands of a Swiss custom house known for pushing Harley-Davidson platforms far beyond their factory brief.
Slideshow: Harley-Davidson's challenges aren't abstract; they show up in dropping shipments, shrinking dealer traffic, and strategic decisions that aren't yet translating into growth.
