How do I know if a custom primary cover will fit my bike?

Fitment is very specific to the year, model, and engine of your motorcycle (e.g., Sportster, Evo Big Twin, Twin Cam). Always use the bike filter on our website and carefully read the product description, which lists the exact models and year ranges the cover is designed for.

Is installing an open primary kit a job I can do myself?

This is an advanced, expert-level installation. It requires precise alignment of the engine and transmission pulleys, proper belt tensioning, and clutch setup. We recommend this job for experienced mechanics only.

Do I have to change my clutch to run an open primary?

Yes, absolutely. Stock Harley-Davidson primaries use a "wet" clutch that runs in oil. An open belt drive must run "dry." Therefore, all open primary kits require you to convert to a dry clutch assembly, which has different friction plates designed to operate without oil.

5 Harley-Davidson Big Twin Motorcycle Primary

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Colony #8919-19-P Primary Cover Smooth Allen Kit 1989-2006 Harley-Davidson Softail 1991-2005 Dyna - Chrome Plated
$48.73

Colony #7812-12 Inner Primary Mounting Kit - 1955-1964 Harley-Davidson Panhead
$29.98

Colony #9868-26 Inner Primary Mounting Kit 1970-1979 Harley-Davidson FL/FX
$34.76

Colony #8918-19 Primary Cover Cap Screw Kit 1989-2006 Harley-Davidson Softail 1991-2005 Dyna - Chrome Plated
$56.11

Colony #7350-15 Acorn Primary Cover Screw Kit 1971-Up & All 4 Speed Harley-Davidson Big Twins - Chrome Plated
$48.73

Colony #8919-19 Primary Cover Chrome Allen Head Screw Kit 1989-2006 Harley-Davidson Softail 1991-2005 Dyna - Chrome Plated
1 review $38.59

Colony #9904-17 Inner Primary Mounting Kit 1986-2000 Harley-Davidson FLT/FXR
2 reviews $20.86

Colony #2997-6 Chain Tensioner Pad and Lockwasher Kit 1965-2000 Harley-Davidson FL/FX
$17.28

Colony #8481-20 Primary Cover Acorn Head Screw Kit 1980-1984 Harley-Davidson Big Twin 5 Speed - Chrome Plated
$48.73

Colony #8917-19 Primary Cover Chrome Acorn Head Screw Kit 1989-2006 Harley-Davidson Softail 1991-2005 Dyna - Chrome Plated
$56.11

Colony #8914-17 Primary Cover Acorn Head Screw Kit 1985-Up Harley-Davidson FXR 1985-1999 FLT - Chrome Plated
$49.25

Colony #8482-20 Primary Cover Cap Screw Kit 1980-1984 Harley-Davidson 5 Speed Big Twins - Chrome Plated
$48.73

Colony #8468-20 Primary Cover Cap Screw Kit 1936-1969 Harley-Davidson Big Twins - Chrome Plated
$59.38

Colony #8915-17 Primary Cover Cap Screw Kit 1985-Up Harley-Davidson FXR 1985-1999 FLT 5 Speed - Chrome Plated
$49.25

Colony #3073-16 Inner Primary Chain Guard Kit 1936-1944 Harley-Davidson Big Twins - Parkerized
1 review $29.04

Colony #9873-16 Inner Primary Mounting Kit 1994-1999 Harley-Davidson Softail 1994-1998 Dyna Glide - CAD Plated
1 review $20.86

Colony #9870-16 Inner Primary Mounting Kit 1986-1993 Harley-Davidson Softail 1991-1993 Dyna Glide
1 review $20.86

Colony #9869-24 Inner Primary Mounting Kit 1980-1985 Harley-Davidson FL/FX
$29.54

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