Dyna Fat Bob (1690 cc)

Pre-1970 machines: many owners run non-detergent or classic-spec oil with no filter, so short intervals matter. Dry sump: drain the tank and the crankcase/sump, flush the tank and clean the feed and return screens.

Factory: Table 1, Regular service intervals: 2017 Harley-Davidson Dyna Models (H-D service information portal, owner's manual maintenance section): at 1,000 mi, then every 5,000 mi. Columns as printed: 1,000 mi (1,600 km), then every 5,000 mi (8,000 km) to 50,000 mi (80,000 km). Note 1: perform annually or at the specified interval, whichever comes first. Note 2: should be performed by an authorized Harley-Davidson dealer unless you have the tools, service data and mechanical qualification. Note 4: more often in severe conditions. The table covers the 2017 Dyna models as a group.

Factory: Table 1, Regular service intervals: 2017 Harley-Davidson Dyna Models (H-D service information portal, owner's manual maintenance section): at 1,000 mi, then every 5,000 mi. Columns as printed: 1,000 mi (1,600 km), then every 5,000 mi (8,000 km) to 50,000 mi (80,000 km). Note 1: perform annually or at the specified interval, whichever comes first. Note 2: should be performed by an authorized Harley-Davidson dealer unless you have the tools, service data and mechanical qualification. Note 4: more often in severe conditions. The table covers the 2017 Dyna models as a group.

Factory: Table 1, Regular service intervals: 2017 Harley-Davidson Dyna Models (H-D service information portal, owner's manual maintenance section): at 1,000 mi, then every 5,000 mi. Columns as printed: 1,000 mi (1,600 km), then every 5,000 mi (8,000 km) to 50,000 mi (80,000 km). Note 1: perform annually or at the specified interval, whichever comes first. Note 2: should be performed by an authorized Harley-Davidson dealer unless you have the tools, service data and mechanical qualification. Note 4: more often in severe conditions. The table covers the 2017 Dyna models as a group.

Factory: Table 1, Regular service intervals: 2017 Harley-Davidson Dyna Models (H-D service information portal, owner's manual maintenance section): at 1,000 mi, then every 5,000 mi. Columns as printed: 1,000 mi (1,600 km), then every 5,000 mi (8,000 km) to 50,000 mi (80,000 km). Note 1: perform annually or at the specified interval, whichever comes first. Note 2: should be performed by an authorized Harley-Davidson dealer unless you have the tools, service data and mechanical qualification. Note 4: more often in severe conditions. The table covers the 2017 Dyna models as a group.

Factory: Table 1, Regular service intervals: 2017 Harley-Davidson Dyna Models (H-D service information portal, owner's manual maintenance section): at 1,000 mi, then every 5,000 mi. Columns as printed: 1,000 mi (1,600 km), then every 5,000 mi (8,000 km) to 50,000 mi (80,000 km). Note 1: perform annually or at the specified interval, whichever comes first. Note 2: should be performed by an authorized Harley-Davidson dealer unless you have the tools, service data and mechanical qualification. Note 4: more often in severe conditions. The table covers the 2017 Dyna models as a group.

Factory: Table 1, Regular service intervals: 2017 Harley-Davidson Dyna Models (H-D service information portal, owner's manual maintenance section): at 1,000 mi, then every 5,000 mi. Columns as printed: 1,000 mi (1,600 km), then every 5,000 mi (8,000 km) to 50,000 mi (80,000 km). Note 1: perform annually or at the specified interval, whichever comes first. Note 2: should be performed by an authorized Harley-Davidson dealer unless you have the tools, service data and mechanical qualification. Note 4: more often in severe conditions. The table covers the 2017 Dyna models as a group.

Factory: Table 1, Regular service intervals: 2017 Harley-Davidson Dyna Models (H-D service information portal, owner's manual maintenance section): at 1,000 mi, then every 5,000 mi. Columns as printed: 1,000 mi (1,600 km), then every 5,000 mi (8,000 km) to 50,000 mi (80,000 km). Note 1: perform annually or at the specified interval, whichever comes first. Note 2: should be performed by an authorized Harley-Davidson dealer unless you have the tools, service data and mechanical qualification. Note 4: more often in severe conditions. The table covers the 2017 Dyna models as a group.

Factory: Table 1, Regular service intervals: 2017 Harley-Davidson Dyna Models (H-D service information portal, owner's manual maintenance section): at 1,000 mi, then every 5,000 mi. Columns as printed: 1,000 mi (1,600 km), then every 5,000 mi (8,000 km) to 50,000 mi (80,000 km). Note 1: perform annually or at the specified interval, whichever comes first. Note 2: should be performed by an authorized Harley-Davidson dealer unless you have the tools, service data and mechanical qualification. Note 4: more often in severe conditions. The table covers the 2017 Dyna models as a group.

Factory: Table 1, Regular service intervals: 2017 Harley-Davidson Dyna Models (H-D service information portal, owner's manual maintenance section): every 5,000 mi from 5,000 mi. Columns as printed: 1,000 mi (1,600 km), then every 5,000 mi (8,000 km) to 50,000 mi (80,000 km). Note 1: perform annually or at the specified interval, whichever comes first. Note 2: should be performed by an authorized Harley-Davidson dealer unless you have the tools, service data and mechanical qualification. Note 4: more often in severe conditions. The table covers the 2017 Dyna models as a group.

Factory: Table 1, Regular service intervals: 2017 Harley-Davidson Dyna Models (H-D service information portal, owner's manual maintenance section): at 1,000 mi, then every 5,000 mi. Columns as printed: 1,000 mi (1,600 km), then every 5,000 mi (8,000 km) to 50,000 mi (80,000 km). Note 1: perform annually or at the specified interval, whichever comes first. Note 2: should be performed by an authorized Harley-Davidson dealer unless you have the tools, service data and mechanical qualification. Note 4: more often in severe conditions. The table covers the 2017 Dyna models as a group.

Factory: Table 1, Regular service intervals: 2017 Harley-Davidson Dyna Models (H-D service information portal, owner's manual maintenance section): at 1,000 mi, then every 5,000 mi. Columns as printed: 1,000 mi (1,600 km), then every 5,000 mi (8,000 km) to 50,000 mi (80,000 km). Note 1: perform annually or at the specified interval, whichever comes first. Note 2: should be performed by an authorized Harley-Davidson dealer unless you have the tools, service data and mechanical qualification. Note 4: more often in severe conditions. The table covers the 2017 Dyna models as a group.

Factory: Table 1, Regular service intervals: 2017 Harley-Davidson Dyna Models (H-D service information portal, owner's manual maintenance section): at 1,000 mi, then every 5,000 mi. Columns as printed: 1,000 mi (1,600 km), then every 5,000 mi (8,000 km) to 50,000 mi (80,000 km). Note 1: perform annually or at the specified interval, whichever comes first. Note 2: should be performed by an authorized Harley-Davidson dealer unless you have the tools, service data and mechanical qualification. Note 4: more often in severe conditions. The table covers the 2017 Dyna models as a group.

Factory: Table 1, Regular service intervals: 2017 Harley-Davidson Dyna Models (H-D service information portal, owner's manual maintenance section): at 1,000 mi, then every 5,000 mi. Columns as printed: 1,000 mi (1,600 km), then every 5,000 mi (8,000 km) to 50,000 mi (80,000 km). Note 1: perform annually or at the specified interval, whichever comes first. Note 2: should be performed by an authorized Harley-Davidson dealer unless you have the tools, service data and mechanical qualification. Note 4: more often in severe conditions. The table covers the 2017 Dyna models as a group.

Factory: Table 1, Regular service intervals: 2017 Harley-Davidson Dyna Models (H-D service information portal, owner's manual maintenance section): at 1,000 mi, then every 5,000 mi. Columns as printed: 1,000 mi (1,600 km), then every 5,000 mi (8,000 km) to 50,000 mi (80,000 km). Note 1: perform annually or at the specified interval, whichever comes first. Note 2: should be performed by an authorized Harley-Davidson dealer unless you have the tools, service data and mechanical qualification. Note 4: more often in severe conditions. The table covers the 2017 Dyna models as a group.

Factory: Table 1, Regular service intervals: 2017 Harley-Davidson Dyna Models (H-D service information portal, owner's manual maintenance section): at 1,000 mi, then every 5,000 mi. Columns as printed: 1,000 mi (1,600 km), then every 5,000 mi (8,000 km) to 50,000 mi (80,000 km). Note 1: perform annually or at the specified interval, whichever comes first. Note 2: should be performed by an authorized Harley-Davidson dealer unless you have the tools, service data and mechanical qualification. Note 4: more often in severe conditions. The table covers the 2017 Dyna models as a group.

Factory: Table 1, Regular service intervals: 2017 Harley-Davidson Dyna Models (H-D service information portal, owner's manual maintenance section): at 1,000 mi, then every 5,000 mi. Columns as printed: 1,000 mi (1,600 km), then every 5,000 mi (8,000 km) to 50,000 mi (80,000 km). Note 1: perform annually or at the specified interval, whichever comes first. Note 2: should be performed by an authorized Harley-Davidson dealer unless you have the tools, service data and mechanical qualification. Note 4: more often in severe conditions. The table covers the 2017 Dyna models as a group.

Mesh or oiled foam: clean and re-oil. Paper: blow out or replace. Some very early machines have no filter at all.

A dry speedo cable whips the needle and eventually kills the instrument.

Factory: Table 1, Regular service intervals: 2017 Harley-Davidson Dyna Models (H-D service information portal, owner's manual maintenance section): at 1,000 mi, then every 10,000 mi. Columns as printed: 1,000 mi (1,600 km), then every 5,000 mi (8,000 km) to 50,000 mi (80,000 km). Note 1: perform annually or at the specified interval, whichever comes first. Note 2: should be performed by an authorized Harley-Davidson dealer unless you have the tools, service data and mechanical qualification. Note 4: more often in severe conditions. The table covers the 2017 Dyna models as a group.

Factory: Table 1, Regular service intervals: 2017 Harley-Davidson Dyna Models (H-D service information portal, owner's manual maintenance section): at 1,000 mi, then every 10,000 mi. Columns as printed: 1,000 mi (1,600 km), then every 5,000 mi (8,000 km) to 50,000 mi (80,000 km). Note 1: perform annually or at the specified interval, whichever comes first. Note 2: should be performed by an authorized Harley-Davidson dealer unless you have the tools, service data and mechanical qualification. Note 4: more often in severe conditions. The table covers the 2017 Dyna models as a group.

Factory: Table 1, Regular service intervals: 2017 Harley-Davidson Dyna Models (H-D service information portal, owner's manual maintenance section): at 1,000 mi, then every 10,000 mi. Columns as printed: 1,000 mi (1,600 km), then every 5,000 mi (8,000 km) to 50,000 mi (80,000 km). Note 1: perform annually or at the specified interval, whichever comes first. Note 2: should be performed by an authorized Harley-Davidson dealer unless you have the tools, service data and mechanical qualification. Note 4: more often in severe conditions. The table covers the 2017 Dyna models as a group.

Factory: Table 1, Regular service intervals: 2017 Harley-Davidson Dyna Models (H-D service information portal, owner's manual maintenance section): at 1,000 mi, then every 10,000 mi. Columns as printed: 1,000 mi (1,600 km), then every 5,000 mi (8,000 km) to 50,000 mi (80,000 km). Note 1: perform annually or at the specified interval, whichever comes first. Note 2: should be performed by an authorized Harley-Davidson dealer unless you have the tools, service data and mechanical qualification. Note 4: more often in severe conditions. The table covers the 2017 Dyna models as a group.

Factory: Table 1, Regular service intervals: 2017 Harley-Davidson Dyna Models (H-D service information portal, owner's manual maintenance section): at 1,000 mi, then every 10,000 mi. Columns as printed: 1,000 mi (1,600 km), then every 5,000 mi (8,000 km) to 50,000 mi (80,000 km). Note 1: perform annually or at the specified interval, whichever comes first. Note 2: should be performed by an authorized Harley-Davidson dealer unless you have the tools, service data and mechanical qualification. Note 4: more often in severe conditions. The table covers the 2017 Dyna models as a group.

Factory: Table 1, Regular service intervals: 2017 Harley-Davidson Dyna Models (H-D service information portal, owner's manual maintenance section): at 1,000 mi, then every 10,000 mi. Columns as printed: 1,000 mi (1,600 km), then every 5,000 mi (8,000 km) to 50,000 mi (80,000 km). Note 1: perform annually or at the specified interval, whichever comes first. Note 2: should be performed by an authorized Harley-Davidson dealer unless you have the tools, service data and mechanical qualification. Note 4: more often in severe conditions. The table covers the 2017 Dyna models as a group.

Factory: Table 1, Regular service intervals: 2017 Harley-Davidson Dyna Models (H-D service information portal, owner's manual maintenance section): at 1,000 mi, then every 10,000 mi. Columns as printed: 1,000 mi (1,600 km), then every 5,000 mi (8,000 km) to 50,000 mi (80,000 km). Note 1: perform annually or at the specified interval, whichever comes first. Note 2: should be performed by an authorized Harley-Davidson dealer unless you have the tools, service data and mechanical qualification. Note 4: more often in severe conditions. The table covers the 2017 Dyna models as a group.

Factory: Table 1, Regular service intervals: 2017 Harley-Davidson Dyna Models (H-D service information portal, owner's manual maintenance section): at 1,000 mi, then every 10,000 mi. Columns as printed: 1,000 mi (1,600 km), then every 5,000 mi (8,000 km) to 50,000 mi (80,000 km). Note 1: perform annually or at the specified interval, whichever comes first. Note 2: should be performed by an authorized Harley-Davidson dealer unless you have the tools, service data and mechanical qualification. Note 4: more often in severe conditions. The table covers the 2017 Dyna models as a group.

Some early telescopic forks are grease filled or use very small oil quantities. Check your manual.

Factory: Table 1, Regular service intervals: 2017 Harley-Davidson Dyna Models (H-D service information portal, owner's manual maintenance section): at 1,000, 5,000 and 20,000 mi, then every 15,000 mi. Columns as printed: 1,000 mi (1,600 km), then every 5,000 mi (8,000 km) to 50,000 mi (80,000 km). Note 1: perform annually or at the specified interval, whichever comes first. Note 2: should be performed by an authorized Harley-Davidson dealer unless you have the tools, service data and mechanical qualification. Note 4: more often in severe conditions. The table covers the 2017 Dyna models as a group.

Many old machines use loose balls in cups and cones. Taper roller conversions are common.

Cup-and-cone and taper roller hubs need periodic repacking and adjustment.

Factory: Table 1, Regular service intervals: 2017 Harley-Davidson Dyna Models (H-D service information portal, owner's manual maintenance section): at 1,000 mi, then every 20,000 mi. Columns as printed: 1,000 mi (1,600 km), then every 5,000 mi (8,000 km) to 50,000 mi (80,000 km). Note 1: perform annually or at the specified interval, whichever comes first. Note 2: should be performed by an authorized Harley-Davidson dealer unless you have the tools, service data and mechanical qualification. Note 4: more often in severe conditions. The table covers the 2017 Dyna models as a group.

Factory: Table 1, Regular service intervals: 2017 Harley-Davidson Dyna Models (H-D service information portal, owner's manual maintenance section): every two years or every 30,000 mi (48,000 km), whichever comes first. Columns as printed: 1,000 mi (1,600 km), then every 5,000 mi (8,000 km) to 50,000 mi (80,000 km). Note 1: perform annually or at the specified interval, whichever comes first. Note 2: should be performed by an authorized Harley-Davidson dealer unless you have the tools, service data and mechanical qualification. Note 4: more often in severe conditions. The table covers the 2017 Dyna models as a group.

Factory: Table 1, Regular service intervals: 2017 Harley-Davidson Dyna Models (H-D service information portal, owner's manual maintenance section): every 30,000 mi. Columns as printed: 1,000 mi (1,600 km), then every 5,000 mi (8,000 km) to 50,000 mi (80,000 km). Note 1: perform annually or at the specified interval, whichever comes first. Note 2: should be performed by an authorized Harley-Davidson dealer unless you have the tools, service data and mechanical qualification. Note 4: more often in severe conditions. The table covers the 2017 Dyna models as a group.

Factory: Table 1, Regular service intervals: 2017 Harley-Davidson Dyna Models (H-D service information portal, owner's manual maintenance section): every 30,000 mi (disassemble, lubricate and inspect). Columns as printed: 1,000 mi (1,600 km), then every 5,000 mi (8,000 km) to 50,000 mi (80,000 km). Note 1: perform annually or at the specified interval, whichever comes first. Note 2: should be performed by an authorized Harley-Davidson dealer unless you have the tools, service data and mechanical qualification. Note 4: more often in severe conditions. The table covers the 2017 Dyna models as a group.

Factory: Table 1, Regular service intervals: 2017 Harley-Davidson Dyna Models (H-D service information portal, owner's manual maintenance section): every 50,000 mi (80,000 km). Columns as printed: 1,000 mi (1,600 km), then every 5,000 mi (8,000 km) to 50,000 mi (80,000 km). Note 1: perform annually or at the specified interval, whichever comes first. Note 2: should be performed by an authorized Harley-Davidson dealer unless you have the tools, service data and mechanical qualification. Note 4: more often in severe conditions. The table covers the 2017 Dyna models as a group.

Factory: Table 1, Regular service intervals: 2017 Harley-Davidson Dyna Models (H-D service information portal, owner's manual maintenance section): every 100,000 mi (161,000 km). Columns as printed: 1,000 mi (1,600 km), then every 5,000 mi (8,000 km) to 50,000 mi (80,000 km). Note 1: perform annually or at the specified interval, whichever comes first. Note 2: should be performed by an authorized Harley-Davidson dealer unless you have the tools, service data and mechanical qualification. Note 4: more often in severe conditions. The table covers the 2017 Dyna models as a group.

Factory: Table 1, Regular service intervals: 2017 Harley-Davidson Dyna Models (H-D service information portal, owner's manual maintenance section): annually. Columns as printed: 1,000 mi (1,600 km), then every 5,000 mi (8,000 km) to 50,000 mi (80,000 km). Note 1: perform annually or at the specified interval, whichever comes first. Note 2: should be performed by an authorized Harley-Davidson dealer unless you have the tools, service data and mechanical qualification. Note 4: more often in severe conditions. The table covers the 2017 Dyna models as a group.

Factory: Table 1, Regular service intervals: 2017 Harley-Davidson Dyna Models (H-D service information portal, owner's manual maintenance section): every two years or sooner if moisture content is 3% or greater. Columns as printed: 1,000 mi (1,600 km), then every 5,000 mi (8,000 km) to 50,000 mi (80,000 km). Note 1: perform annually or at the specified interval, whichever comes first. Note 2: should be performed by an authorized Harley-Davidson dealer unless you have the tools, service data and mechanical qualification. Note 4: more often in severe conditions. The table covers the 2017 Dyna models as a group.

Old rubber and modern ethanol fuel do not mix well.