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Thrashin Supply Harley Derby Covers - Twin Cam/ Evo
Thrashin Supply
$119.95 - $129.95Thrashin Supply Harley Derby Covers - Twin Cam/ Evo The Thrashin Supply Co. Classic Derby Cover is constructed from tough billet aluminum. Not only does this look super clean and sleek but it's durable so it'll last. Available in your choice of polished...$119.95 - $129.95 -
V-Twin - Inner Primary Mounting Bolt for Twin Cam (OEM #786A)
V-Twin Manufacturing
$39.29V-Twin - Inner Primary Mounting Bolt for Twin Cam (OEM #786A) Inner primary mounting bolt for Twin Cam is a grade 5 bolt with built in sealing washer under bolt flange. Fitment: FXBB 2018-UP FXFB 2018-UP FXD 2006-2017 FLST 2007-2017 FXLR...$39.29 -
Drag Specialties - Harley Davidson Primary Chain
Drag Specialties
$110.16 - $132.60Drag Specialties Primary Chain This primary chain by Drag was designed to last made using high quality raw materials. Features: Improved fatigue resistance Pre-loaded to reduce initial elongation Endless construction using...$110.16 - $132.60 -
Baker - High Torque Bearing/Seal Kit fits '99-'06 Harley Twin Cam
Baker
$66.00Baker - High Torque Bearing/Seal Kit fits '99-'06 Harley Twin Cam If your Harley has got some serious horsepower then this is just what you need. The Baker High Torque Bearing/Seal Kit is made to replace the two-piece bearing and seal in the inner...$66.00 -
Trask Assault Series Derby Cover - fits '16-'21 Harley Touring Models
Trask Performance
$279.95Trask Assault Series Derby Cover - fits '16-'21 Harley Touring Models Upgrade the look of your Harley Davidson's primary with this see-through derby cover from Trask performance. Available in Chrome, Gloss Black, and Raw Machined. Features: Billet...$279.95 -
PSR - Manual Primary Chain Tensioner fits '07-'16 Touring Models
PSR
$222.95PSR - Manual Primary Chain Tensioner fits '07-'16 Touring Models PSR's Manual Primary Chain Tensioner is precision-machined from billet aluminum. It helps with over-tightening and is easy to adjust. Features Heavy-duty manual tensioner Mounts with...$222.95 -
Baker - Armored Attitude Chain Adjuster fits '06-'17 Dyna, '07-'17 Softail and '07-'23 Touring Models
Baker
$299.00Baker - Armored Attitude Chain Adjuster fits '06-'17 Dyna, '07-'17 Softail and '07-'23 Touring Models Features 28% finer teeth spacing (compared to '01-'06 chain adjuster) for more accurate adjustments Active Plate and Back Support Plate investment...$299.00 -
Energy Suspension - Poly Cush Drive fits '09 & Up Touring Models
Energy Suspension
$46.99Energy Suspension - Poly Cush Drive fits '09 & Up Touring Models Features Manufactured with proprietary Hyer-Flex™ Polyurethane Out performs and outlasts OEM rubber Resists Oils and Chemicals Smoother ride Fitment 2019 - FLHR Road...$46.99 -
Drag Specialties - Derby Covers - Fits '16-'18 FLHT/FLHX/FLTRS, '15 FLHTCUL/FLHTKL
Drag Specialties
$64.21 - $66.25Drag Specialties - Derby Covers These Domed Design Derby Covers have a clean simple look. Features: Die-cast construction Available in multiple finishes Includes mounting hardware Fitment: '16-'18 FLHT/FLHX/FLTRS '15 FLHTCUL/FLHTKL$64.21 - $66.25 -
James Gaskets - Primary Gasket, Seal & O-Ring Kit W/ Silicone Bead fits '04-'21 Sportster Models (Exc. '21 Sportster S/RH1250S)
James Gaskets
$39.95James Gaskets - Primary Gasket, Seal & O-Ring Kit W/ Silicone Bead fits '04-'21 Sportster Models (Exc. '21 Sportster S/RH1250S) This kit features top-quality gaskets, seals and O-rings that meet or exceed OEM specifications. Features Primary...$39.95 -
Drag Specialties - Manual Primary Chain Adjuster fits '07-'16 Touring, '09-'16 H-D FL Trike, '07-'17 Softail & '06-'17 Dyna Models
Drag Specialties
$151.93Drag Specialties - Manual Primary Chain Adjuster fits '07-'16 Touring, '09-'16 H-D FL Trike, '07-'17 Softail & '06-'17 Dyna Models The Manual Primary Chain Adjuster allows for the proper adjustment of the primary chain to the factory requirements of...$151.93 -
James Gaskets - Gasket Kit, Primary Cover - fits '05-'06 Touring Models
James Gaskets
$75.95The James Gaskets Gasket Kit,Primary: State of the art material Made in the USA Fitment: '05-'06 Touring Models$75.95 -
Colony - 1-1/4" Sprocket/Belt Pulley Mounting Hardware Kit with Nuts fits '73-'92 FL, FX & XL Models (OEM #41197-73)
Colony Machine
$25.95Colony - 1-1/4" Sprocket/Belt Pulley Mounting Hardware Kit with Nuts fits '73-'92 FL, FX & XL Models (OEM #41197-73) Features: Brake rotor, sprocket and belt mounting kits Available to fit virtually all H-D brakes, chain and belt...$25.95 -
Feuling - 12-Point External Primary/Transmission Engine Fastener Kit fits '17-'22 Touring Models
Feuling
$269.95Feuling - 12-Point External Primary/Transmission Engine Fastener Kit fits '17-'22 Touring Models This kit comes with a primary cover, a derby cover, top transmission cover right transmission bearing housing, a clutch release cover, sensors and...$269.95 -
Barnett - Scorpion Derby Spacer Plate fits All '17 Touring Models
Barnett
$78.13Barnett - Scorpion Derby Spacer Plate fits All '17 Touring Models NOTE: THIS PART IS REQUIRED FOR USE WITH PART NO. 1130-0210. PLEASE SEE 'ALSO BOUGHT' FOR DETAILS. This spacer plate is needed in order to install a Scorpion Lock-up clutch on '15...$78.13 -
James Gaskets - Gasket-Seal Kit, Primary Cover - fits '94-'04 FLT, FXR
James Gaskets
$98.95James Gaskets Gasket Kits use state of the art materials and production methods to make the best gaskets available. Made in the USA Fitment: '94-'04 FLT, FXR$98.95 -
Feuling - 12-Point Primary/Transmission Engine Fastener Kit fits '00-'06 Touring Models
Feuling
$269.95Feuling - 12-Point Primary/Transmission Engine Fastener Kit fits '00-'06 Touring Models The 12-Point Primary/Transmission Engine Fastener Kit allows you to secure your engine with complete confidence. The kit comes with all of the following hardware:...$269.95 -
James Gaskets - Gasket Kit, Primary Cover - fits '07-Up Touring Models
James Gaskets
$75.95The James Gaskets Gasket Kit,Primary: State of the art material Foam covered metal w/ bead Made in the USA Fitment: '07-Up Touring Models$75.95 -
Thrashin' Supply - Finned Five-Hole Derby Covers fits '16 & Up Touring Models
Thrashin Supply
$179.95Thrashin' Supply - Finned Five-Hole Derby Covers fits '16 & Up Touring Models Thrashin' Supply's Five-Hole Derby Covers are built from 6061 billet aluminum and utilize stock gasket and hardware. Available in your choice of black anodized finish...$179.95 -
Drag Specialties - Aluminum Outer Primary Covers fits '99-'06 Touring Models
Drag Specialties
$334.51 - $363.07Drag Specialties - Aluminum Outer Primary Covers fits '99-'06 Touring Models The Drag Specialties Aluminum Outer Primary Cover is a replacement for OEM #60665-99. It is available in your choice of a chrome or satin black finish. Features Die-cast...$334.51 - $363.07 -
Covington's Customs - Finned Inspection Covers - fits '99-'06 FLT/FLHT/FLHR/FLTR
Covington's Customs
$90.95Covington's Customs Finned Inspection Covers - fits '99-'06 Touring Models These Finned Inspection Cover are CNC-machined from billet aluminum and are available in Gloss Black or Chrome. Features: FINNED INSPECTION COVERS CNC-machined from billet...$90.95 -
James Gaskets - Gasket Kit, Inspection-Derby Cover - fits '99-'06 Touring Models
James Gaskets
$27.95The James Gaskets Gasket Kit,Inspection-Derby Cover: State of the art material Made in the USA Fitment: '99-'06 Touring Models$27.95 -
Belt Drives Ltd. - 2" Drive Belt fits '07-'16 FLHR, '07-'13 FLHT/FLTR w/ Mechanical Clutch
Belt Drives Ltd
$3,355.95 - $3,590.95Belt Drives Ltd. - 2" Drive Belt fits '07-'16 FLHR, '07-'13 FLHT/FLTR w/ Mechanical Clutch Features: Includes BDL's ball-bearing lockup clutch, new full-coverage side guard and top mesh belt guard Kit also includes motor plate and a 132-tooth...$3,355.95 - $3,590.95 -
Belt Drives Ltd. - 1-5/8" Belt Drive fits '99-'06 FLT/FLHT/FLHR/FLHX/FLTR Models
Belt Drives Ltd
$1,116.95Belt Drives Ltd. - 1-5/8" Belt Drive fits '99-'06 FLT/FLHT/FLHR/FLHX/FLTR Models Features: 1-5/8" kits include front pulley, belt, clutch hub, clutch basket and aramid clutch set (consists of two half plates, four full plates and five steel drive...$1,116.95 -
Belt Drives Ltd. - 2" Drive Belt fits '99-'06 FLHT/FLHR/FLTR/FLHX Models
Belt Drives Ltd
$3,355.95 - $3,590.95Belt Drives Ltd. - 2" Drive Belt fits '99-'06 FLHT/FLHR/FLTR/FLHX Models Features: Includes BDL's ball-bearing lockup clutch, new full-coverage side guard and top mesh belt guard Kit also includes motor plate and a 132-tooth belt 2" drive width...$3,355.95 - $3,590.95 -
Belt Drives Ltd. - 2" Belt Drive Kit fits '07-'16 FLHR, '07-'13 FLHT/FLTR/FLHX Models w/ Mechanical Clutch
Belt Drives Ltd
$3,590.95 - $3,829.95Belt Drives Ltd. - 2" Belt Drive Kit fits '07-'16 FLHR, '07-'13 FLHT/FLTR/FLHX Models w/ Mechanical Clutch Features: Features a two-piece motor plate design and 2" primary belt 52/69 pulley combination for a 1.32:1 final drive ratio Belt profiles...$3,590.95 - $3,829.95 -
Belt Drives Ltd. - 2" Belt Drive Kit fits '14-'16 FLHT/FLHR/FLTRX w/ Hydraulic clutch (Exc. FLHTCUL/FLHTKL)
Belt Drives Ltd
$2,501.95 - $3,607.95Belt Drives Ltd. - 2" Belt Drive Kit fits '14-'16 FLHT/FLHR/FLTRX w/ Hydraulic clutch (Exc. FLHTCUL/FLHTKL) Features: Features a two-piece motor plate design and 2" primary belt 52/69 pulley combination for a 1.32:1 final drive ratio Belt...$2,501.95 - $3,607.95 -
Belt Drives Ltd. - 2" Belt Drive Kit fits '17-'20 FLHT/FLHR/FLHX/FLTRX/FLTRU/FLTRK w/ Hydraulic Clutch
Belt Drives Ltd
$3,469.95 - $3,699.95Belt Drives Ltd. - 2" Belt Drive Kit fits '17-'20 FLHT/FLHR/FLHX/FLTRX/FLTRU/FLTRK w/ Hydraulic Clutch Features: Features a two-piece motor plate design and 2" primary belt 52/69 pulley combination for a 1.32:1 final drive ratio Belt profiles...$3,469.95 - $3,699.95 -
Belt Drives Ltd. - Belt Drive Kit fits '17-'20 FLHT/FLHR/FLHX/FLTRX/FLTRU/FLTRK w/ Hydraulic Clutch
Belt Drives Ltd
$3,884.95 - $4,186.95Belt Drives Ltd. - Belt Drive Kit fits '17-'20 FLHT/FLHR/FLHX/FLTRX/FLTRU/FLTRK w/ Hydraulic Clutch Features: Features a one-piece motor plate design and 2" primary belt 52/69 pulley combination for a 1.32:1 final drive ratio Belt profiles are...$3,884.95 - $4,186.95 -
Colony - Inner Primary Mount Kit fits '86-'98 FLT Model (OEM #2818, 2871W, 33318-35)
Colony Machine
$25.95Colony - Inner Primary Mount Kit fits '86-'98 FLT Model (OEM #2818, 2871W, 33318-35) Features: Kits include all required hardware needed to install an inner primary Made in the U.S.A. Replacement Part for...$25.95 -
V-Twin - Primary Gasket Kit fits '85-'94 FLT, '84-'93 FXR Models
V-Twin Manufacturing
$36.25V-Twin - Primary Gasket Kit fits '85-'94 FLT, '84-'93 FXR Models FXR/FLT Primary gasket kit is a three piece kit Fitment: FLT 1985-1994 FXR 1984-1993 Late 1984$36.25 -
Colony - Inner Primary Mount Kit fits '70-'79 Big Twin 4-Speed Models (OEM #16830-54, 4017, 4021)
Colony Machine
$43.95Colony - Inner Primary Mount Kit fits '70-'79 Big Twin 4-Speed Models (OEM #16830-54, 4017, 4021) Features: Kits include all required hardware needed to install an inner primary Made in the U.S.A. Replacement Part for...$43.95 -
Colony - 7/16"-14 x 1-1/2" Sprocket Pulley Mounting Hardware Kit with Washers fits '73-'98 FL, FX & XL Models (OEM #3769)
Colony Machine
$30.95Colony - 7/16"-14 x 1-1/2" Sprocket Pulley Mounting Hardware Kit with Washers fits '73-'98 FL, FX & XL Models (OEM #3769) Features: Brake rotor, sprocket and belt mounting kits Available to fit virtually all H-D brakes, chain and belt...$30.95 -
Colony - Acorn Front Belt Drive Pulley Nut fits '99-'06 Twin Cam Models
Colony Machine
$14.95Colony - Acorn Front Belt Drive Pulley Nut fits '99-'06 Twin Cam Models Features: Chrome front pulley nut for open primary belt drive applications Made in the U.S.A. Fitment 2006 Harley-Davidson Softail Heritage EFI...$14.95 -
James Gaskets - Primary Gasket, Seal & O-Ring Kit W/ Silicone Bead fits '07-'16 Touring Models
James Gaskets
$75.95James Gaskets - Primary Gasket, Seal & O-Ring Kit W/ Silicone Bead fits '07-'16 Touring Models This kit features top-quality gaskets, seals and O-rings that meet or exceed OEM specifications. Features Primary gasket features silicone...$75.95 -
James Gaskets - Primary Gasket, Seal & O-Ring Kit fits '17-'23 Touring Models
James Gaskets
$59.95James Gaskets - Primary Gasket, Seal & O-Ring Kit fits '17-'23 Touring Models This kit features top-quality gaskets, seals and O-rings that meet or exceed OEM specifications. Features Primary gasket features silicone beading Made in the U.S.A...$59.95 -
Drag Specialties - Inner Primary Mainshaft Bearing/Seal Kit fits '89-'99 Evolution Big Twin & '99-'06 Big Twin Models (Exc. Dyna Glide Models)
Drag Specialties
$50.95Drag Specialties - Inner Primary Mainshaft Bearing/Seal Kit fits '89-'99 Evolution Big Twin & '99-'06 Big Twin Models (Exc. Dyna Glide Models) This kit comes with a pinion seal, a main shaft seal, bearing snap rings, an inner bearing race and a...$50.95 -
Performance Machine - Derby Covers fits '16-'21 Dressers, HD FL Trike & '15 FLHTCUL/FLHTKL Models
Performance Machine
$326.95Performance Machine - Derby Covers fits '16-'21 Dressers, HD FL Trike & '15 FLHTCUL/FLHTKL Models Performance Machine's Vision Derby Covers feature a special polycarbonate lens that give you a glimpse of the machine's inner workings! All Derby...$326.95 -
Drag Specialties - Aluminum Outer Primary Covers fits '07-'16 Touring Models
Drag Specialties
$403.87 - $404.89Drag Specialties - Aluminum Outer Primary Covers fits '07-'16 Touring Models The Drag Specialties Aluminum Outer Primary Cover is a replacement for OEM #60553-07A. It is available in your choice of a chrome or satin black finish. Features Die-cast...$403.87 - $404.89 -
Out of stock
Thrashin Supply Harley Twin Cam Derby Covers, Dished
Thrashin Supply
$139.95Thrashin Supply Co. Dished Derby Cover for Harley Twin Cam Models The Thrashin Supply Co. Dished Derby Cover is constructed from tough billet aluminum. Not only does this look super clean and sleek but it's durable so it'll last. Available in your...$139.95
Harley Primary
Upgrade your Harley primary system with premium components designed for peak performance and durability. Found under our Clutch, Driveline & Transmission category, these parts are engineered to ensure smoother power delivery, reduced vibration, and more efficient drivetrain operation. Whether you're maintaining or upgrading, a strong Harley primary setup is key to getting the most out of your ride.
Our collection includes high-quality Harley primary covers, primary chains, compensator sprockets, clutch baskets, and both inner and outer primary components—all crafted from durable materials like forged steel and precision-machined aluminum. Built to handle aggressive riding and tough conditions, these parts meet or exceed OEM standards.
Don’t settle for less. Explore our full range of Harley primary parts and Harley primary covers today and feel the performance difference every time you hit the throttle.