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Bob teaches you how to service the spark plugs on your Harley’s engine. Although you can clean and service your old spark plugs, Bob recommends just buying new ones because they are fairly inexpensive. You should purchase gapped, Harley-only spark plugs which usually come with a gap of 38-43,000th of an inch. After applying some anti-seize to the threads of the new plugs, you can thread them into the cylinder by hand and tighten them with a torque wrench and you’ll be good to go.
Bob and Mark show you how to remove and replace the Harley front wheel on your Sportster. They teach you the proper way to take off the brake caliper and wheel axle so you can do whatever you need to do to the front tire. Once the wheel is off you can replace the tire, retrue the spokes or check the rotor.
Bob and Mark put an older Sportster up on the lift to show you how to service the front and rear brake calipers. They teach you which parts to remove, clean and replace, and discuss the components of the single piston-style caliper assembly and how they work.
Bob and Mark demonstrate the best way to empty Harley fork oil from your Sportster’s front fork sliders and replace it with new oil. It can be a two-man job, so try to complete the service with a friend. Newer bikes mostly use 39-millimeter forks, but most bikes are preset with varying levels of spring in the sliders, so consult your manual before you begin this service. Like any other service, you should clean all of the parts that you remove with parts cleaner to ensure that your bike operates smoothly between services.