Harley Drivetrain
Harley Bike Drivetrain Parts at JJ Motorsports
Upgrade your Harley's drivetrain for smoother power delivery and reliability with components from JJ Motorsports. Our selection includes transmission mounting plates, offset sprockets, mechanical reverse kits, starter spacers, pulley spacers, and primary covers designed for heavy-duty use, easy bolt-in installation, and enhanced performance. Compatible with Big Twins, Softail, Dyna, and more, these parts feature chrome finishes, billet aluminum, and CNC-machined steel for corrosion resistance and custom fitment.
Shop trusted brands like Paughco for primary covers and PBI for sprockets. Explore related categories such as Harley engine parts for rebuilds or Harley suspension for balanced setups.
Top Harley Drivetrain Products
- PAUGHCO Transmission Plate - OE Type 4-Speed 218 – Heavy-duty steel for Big Twins with 4-speed transmissions.
- PBI Offset Transmission Sprocket - 22-Tooth 281-22 – CNC-machined chromoly steel with 0.750" offset for 530 chains.
- MOTOR TRIKE Mechanical Reverse Kit MTTR-0025 – Lightweight aluminum with electronic cut-off for easy parking.
- TERRY COMPONENTS Starter Spacer 779000 – Billet aluminum, 1-1/2" thick for longer starters.
- PINGEL Rear Pulley Spacer 62051 – Billet aluminum for wider tires up to 142mm.
Browse our in-stock inventory below with same-day shipping and expert support. Questions? Contact us for fitment advice!
- Product
- Qty in Cart
- Quantity
- Price
- Subtotal
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On Sale
Belt Drives Ltd 8mm 1.5in Primary Belt Drive Kit for 1948-1954 Harley-Davidson FL 62-39TK-1
BELT DRIVES LTD.
MSRP: $764.62Now: $726.39Was: $764.62If you're running a classic Harley-Davidson FL from the late 1930s through mid-1950s, the integrity of your primary drive directly impacts reliability and performance. This Belt Drives Ltd kit...DS360104- SKU:
- DS360104
- Availability:
- Ships Same Business Day
- Weight:
- 8.63 LBS
- WIDTH IMPERIAL:
- 1-1/2'
- MATERIAL:
- ALUMINUM
- RIDING STYLE:
- STREET
- COLOR/FINISH:
- ANODIZED
- THICKNESS IMPERIAL:
- 5/16'
- UNITS:
- KIT
- PRODUCT NAME:
- BELT DRIVE KIT
- TOOTH COUNT:
- 132
MSRP: $764.62Now: $726.39Was: $764.62 -
On Sale
Belt Drives Ltd 11mm Belt Drive Kit for 1980-1983 Harley-Davidson Touring and 1982-1983 FXR 47-31SE-5
BELT DRIVES LTD.
MSRP: $905.38Now: $860.11Was: $905.38If you're running a 1980-1983 Harley-Davidson Touring or 1982-1983 FXR, upgrading to a modern belt drive system eliminates the maintenance headaches of chain drive while delivering smoother power...DS360105- SKU:
- DS360105
- Availability:
- Ships Same Business Day
- Weight:
- 11.38 LBS
- COLOR/FINISH:
- ANODIZED
- WIDTH IMPERIAL:
- 1-1/2'
- MATERIAL:
- ALUMINUM
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- BELT DRIVE KIT
- UNITS:
- KIT
MSRP: $905.38Now: $860.11Was: $905.38 -
On Sale
Belt Drives Ltd Transmission Pulley 31 Tooth for 1995-2006 Harley-Davidson Softail FLSTN TP-31
BELT DRIVES LTD.
MSRP: $202.95Now: $192.80Was: $202.95A lighter transmission pulley directly improves throttle response and reduces parasitic drag on your engine, translating to noticeable gains in acceleration and overall drivability. The TP-31's 6061...DS360166- SKU:
- DS360166
- Availability:
- Ships Same Business Day
- Weight:
- 3.00 LBS
- TOOTH COUNT:
- 31
- COLOR/FINISH:
- ANODIZED
- PRODUCT NAME:
- PULLEY
- MATERIAL:
- 6061 T-6 BILLET ALUMINUM
- RIDING STYLE:
- STREET
- UNITS:
- EACH
MSRP: $202.95Now: $192.80Was: $202.95Qty in Cart: 0Quantity:Price:MSRP: $202.95Now: $192.80Was: $202.95Subtotal: -
On Sale
Belt Drives Ltd Replacement Primary Belt 11mm 99 Teeth for Harley-Davidson FL Models BDL-1185
BELT DRIVES LTD.
MSRP: $162.15Now: $154.04Was: $162.15A worn or damaged primary belt directly compromises power transfer efficiency and reliability—exactly what you can't afford in demanding riding conditions. The BDL-1185 Replacement Primary Belt...DS360009- SKU:
- DS360009
- Availability:
- Ships Same Business Day
- Weight:
- 0.81 LBS
- STYLE:
- RIBBED
- PRODUCT NAME:
- DRIVE BELT
- RIDING STYLE:
- STREET
- TOOTH COUNT:
- 99
- UNITS:
- EACH
- TYPE:
- PRIMARY
- WIDTH IMPERIAL:
- 1-1/2'
MSRP: $162.15Now: $154.04Was: $162.15 -
On Sale
Belt Drives Ltd Rear Drive Belt 137 Tooth 1 inch Harley-Davidson 2007-2020 PCC-137-1
BELT DRIVES LTD.
MSRP: $348.00Now: $330.60Was: $348.00A Harley-Davidson rear drive belt is your direct connection to reliable power transfer—any degradation means compromised acceleration and potential catastrophic failure on the road. The Belt Drives...11200407- SKU:
- 11200407
- Availability:
- Ships Same Business Day
- Weight:
- 1.84 LBS
- RIDING STYLE:
- STREET
- TOOTH COUNT:
- 137
- UNITS:
- EACH
- MATERIAL:
- X7N CARBON
- PRODUCT NAME:
- BELT
- TYPE:
- REAR DRIVE
- WIDTH IMPERIAL:
- 1'
MSRP: $348.00Now: $330.60Was: $348.00 -
On Sale
Belt Drives Ltd 1-5/8" Belt Drive for 1990-2006 Harley-Davidson Softail and Dyna EVBB-2SL
BELT DRIVES LTD.
MSRP: $1,359.85Now: $1,291.86Was: $1,359.85The Belt Drives Ltd 1-5/8" Belt Drive EVBB-2SL delivers reliable power transfer and smooth clutch engagement for your Softail or Dyna without compromise. This complete system eliminates the guesswork...11200247- SKU:
- 11200247
- Availability:
- Ships Same Business Day
- Weight:
- 16.00 LBS
- MATERIAL:
- KEVLAR
- WIDTH IMPERIAL:
- 1-5/8'
- MATERIAL:
- 6061 T-6 BILLET ALUMINUM
- PRODUCT NAME:
- BELT DRIVE KIT
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- MATERIAL:
- STEEL
MSRP: $1,359.85Now: $1,291.86Was: $1,359.85 -
On Sale
Belt Drives Ltd High Performance Extra Clutch Plate Kit 1990-1997 Harley Davidson BTXP-12
BELT DRIVES LTD.
MSRP: $306.62Now: $291.29Was: $306.62If you're running a big-bore Harley and experiencing clutch slippage or inconsistent engagement under load, the Belt Drives Ltd Extra Plate Kit BTXP-12 directly addresses these issues by expanding...11311804- SKU:
- 11311804
- Availability:
- Ships Same Business Day
- Weight:
- 2.48 LBS
- DRIVE PLATE MATERIAL:
- STEEL
- FRICTION PLATE MATERIAL:
- KEVLAR
- TYPE:
- CLUTCH
- RIDING STYLE:
- STREET
- FRICTION PLATE MATERIAL:
- STEEL
- PRODUCT NAME:
- PLATE SET
- UNITS:
- SET OF 8
MSRP: $306.62Now: $291.29Was: $306.62 -
On Sale
Belt Drives Ltd High-Performance Clutch Plate Kit for 1998-2017 Harley-Davidson Road King FLHR BTXP-14
BELT DRIVES LTD.
MSRP: $409.54Now: $389.06Was: $409.54Stock clutch plates struggle under the demands of big-bore Harley engines—slipping engagement, inconsistent power delivery, and premature wear are common failures. The Belt Drives Ltd Extra Plate Kit...11311806- SKU:
- 11311806
- Availability:
- Ships Same Business Day
- Weight:
- 2.65 LBS
- FRICTION PLATE MATERIAL:
- 6061 T-6 ALUMINUM
- PRODUCT NAME:
- PLATE SET
- RIDING STYLE:
- STREET
- FRICTION PLATE MATERIAL:
- KEVLAR
- TYPE:
- CLUTCH
- UNITS:
- SET OF 9
- DRIVE PLATE MATERIAL:
- STEEL
MSRP: $409.54Now: $389.06Was: $409.54 -
On Sale
Belt Drives Ltd Offset Spacer 1-1/2" for Harley-Davidson 1994-2006 FLHR Road King IN-1500
BELT DRIVES LTD.
MSRP: $136.15Now: $129.34Was: $136.15Proper pulley alignment is critical to drivetrain longevity and belt performance on your FLHR Road King. This offset spacer corrects misalignment issues that lead to premature belt wear, noise, and...20175002- SKU:
- 20175002
- Availability:
- Ships Same Business Day
- Weight:
- 1.80 LBS
- TYPE:
- PULLEY
- COLOR/FINISH:
- CHROME
- PRODUCT NAME:
- SPACER INSERT
- RIDING STYLE:
- STREET
- UNITS:
- EACH
MSRP: $136.15Now: $129.34Was: $136.15Qty in Cart: 0Quantity:Price:MSRP: $136.15Now: $129.34Was: $136.15Subtotal: -
On Sale
Belt Drives Ltd Big Fix Bearing 1936-1984 Big Twin BF-1
BELT DRIVES LTD.
MSRP: $58.00Now: $55.10Was: $58.00If your clutch engagement feels spongy or you're experiencing slip under load, worn caged roller bearings are likely the culprit. The Belt Drives Ltd Big Fix Bearing kit replaces those outdated...DS360172- SKU:
- DS360172
- Availability:
- Ships Same Business Day
- Weight:
- 0.75 LBS
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- BEARING KIT
- UNITS:
- KIT
- TYPE:
- CLUTCH
MSRP: $58.00Now: $55.10Was: $58.00Qty in Cart: 0Quantity:Price:MSRP: $58.00Now: $55.10Was: $58.00Subtotal: -
On Sale
Belt Drives Ltd Clutch Hub for Top Fuel 1990-2006 Softail TFCH-180
BELT DRIVES LTD.
MSRP: $333.85Now: $317.16Was: $333.85When you're running top fuel in a Softail, your clutch hub absorbs extreme rotational forces that demand precision engineering and uncompromising durability. Belt Drives Ltd's TFCH-180 is...11200035- SKU:
- 11200035
- Availability:
- Ships Same Business Day
- Weight:
- 1.85 LBS
- COLOR/FINISH:
- ANODIZED
- UNITS:
- EACH
- WIDTH IMPERIAL:
- 3-3/8'
- PRODUCT NAME:
- CLUTCH HUB
- MATERIAL:
- ALUMINUM
- RIDING STYLE:
- STREET
MSRP: $333.85Now: $317.16Was: $333.85 -
On Sale
Belt Drives Ltd Replacement Primary Drive Belt for Harley-Davidson FL 1200 1970-1977 BDL-30853 ST
BELT DRIVES LTD.
MSRP: $105.38Now: $100.11Was: $105.38Primary drive belt wear is one of the most common culprits behind power loss and unreliable starts on classic Harley-Davidson FL models. The BDL-30853 ST is a precision-engineered replacement belt...DS360007- SKU:
- DS360007
- Availability:
- Ships Same Business Day
- Weight:
- 0.56 LBS
- TOOTH COUNT:
- 132
- UNITS:
- EACH
- RIDING STYLE:
- STREET
- STYLE:
- RIBBED
- PRODUCT NAME:
- DRIVE BELT
- TYPE:
- PRIMARY
- WIDTH IMPERIAL:
- 1-1/2'
MSRP: $105.38Now: $100.11Was: $105.38Qty in Cart: 0Quantity:Price:MSRP: $105.38Now: $100.11Was: $105.38Subtotal: -
On Sale
Belt Drives Ltd 144 Tooth 8mm x 3in Primary Drive Belt BDL-37144-3
BELT DRIVES LTD.
MSRP: $227.23Now: $215.87Was: $227.23Belt slippage and power loss compromise your drive system's efficiency and reliability. The BDL-37144-3 replacement belt delivers consistent engagement and optimal power transfer, engineered to OEM...DS360014- SKU:
- DS360014
- Availability:
- Ships Same Business Day
- Weight:
- 1.19 LBS
- RIDING STYLE:
- STREET
- TOOTH COUNT:
- 144
- TYPE:
- PRIMARY
- PRODUCT NAME:
- DRIVE BELT
- WIDTH IMPERIAL:
- 3'
- STYLE:
- RIBBED
- UNITS:
- EACH
MSRP: $227.23Now: $215.87Was: $227.23 -
BURLY BRAND Light Clutch Kit B17-115
BURLY BRAND
$52.95Extended riding sessions demand a clutch system that doesn't punish your hand and forearm with excessive pull pressure. The BURLY BRAND Light Clutch Kit B17-115 reduces lever effort by 40%, allowing...DS223005- SKU:
- DS223005
- Availability:
- Ships Same Business Day
- Weight:
- 0.19 LBS
- RIDING STYLE:
- STREET
- MODEL:
- EASYBOY LITE
- UNITS:
- EACH
- PRODUCT NAME:
- CLUTCH KIT
$52.95 -
BURLY BRAND Light Clutch Kit B17-116
BURLY BRAND
$58.95Extended riding sessions demand a clutch system that doesn't punish your hand and forearm with fatigue. The BURLY BRAND Light Clutch Kit B17-116 reduces clutch pull by 40%, delivering noticeably...DS223006- SKU:
- DS223006
- Availability:
- Ships Same Business Day
- Weight:
- 0.19 LBS
- RIDING STYLE:
- STREET
- MODEL:
- EASYBOY LITE
- PRODUCT NAME:
- CLUTCH KIT
- UNITS:
- EACH
$58.95 -
BURLY BRAND Light Clutch Kit B17-117
BURLY BRAND
$45.95Extended riding sessions demand a clutch system that doesn't punish your hand and forearm with fatigue. The BURLY BRAND Light Clutch Kit B17-117 reduces pull effort by 40%, delivering smooth,...11300183- SKU:
- 11300183
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- UNITS:
- EACH
- RIDING STYLE:
- STREET
- MODEL:
- EASYBOY LITE
- PRODUCT NAME:
- CLUTCH KIT
$45.95 -
On Sale
ARLEN NESS Transmission Side Cover - Chrome - Cable 03-812
ARLEN NESS
MSRP: $179.95Now: $161.96Was: $179.95The ARLEN NESS Transmission Side Cover elevates your bike's aesthetics while delivering the durability required for high-performance riding. This billet aluminum replacement maintains OEM fitment and...11050107- SKU:
- 11050107
- Availability:
- Ships Same Business Day
- Weight:
- 2.15 LBS
- MOUNTING STYLE:
- 6 HOLE
- STYLE:
- 10 GAUGE
- TYPE:
- TRANSMISSION
- MATERIAL:
- 6061 T-6 BILLET ALUMINUM
- PRODUCT NAME:
- SIDE COVER
- UNITS:
- EACH
- COLOR/FINISH:
- CHROME
- RIDING STYLE:
- STREET
MSRP: $179.95Now: $161.96Was: $179.95Qty in Cart: 0Quantity:Price:MSRP: $179.95Now: $161.96Was: $179.95Subtotal: -
On Sale
ARLEN NESS Black 10 Gauge Top Transmission Cover 03-853
ARLEN NESS
MSRP: $179.95Now: $161.96Was: $179.95A transmission cover isn't just cosmetic—it protects your drivetrain from debris, heat, and moisture while maintaining a clean engine bay aesthetic. The ARLEN NESS Black 10 Gauge Top Transmission...11050112- SKU:
- 11050112
- Availability:
- Ships Same Business Day
- Weight:
- 0.90 LBS
- COLOR/FINISH:
- BLACK
- MODEL:
- 10 GAUGE
- MOUNTING STYLE:
- 6 HOLE
- PRODUCT NAME:
- TOP COVER
- TYPE:
- TRANSMISSION
- UNITS:
- EACH
- MATERIAL:
- BILLET ALUMINUM
- RIDING STYLE:
- STREET
MSRP: $179.95Now: $161.96Was: $179.95 -
On Sale
ARLEN NESS Transmission Cover - Black 03-854
ARLEN NESS
MSRP: $179.95Now: $161.96Was: $179.95The ARLEN NESS Transmission Cover replaces worn or damaged OEM covers while maintaining proper gasket sealing and hardware integrity. This direct-fit replacement eliminates oil leaks and restores a...11050246- SKU:
- 11050246
- Availability:
- Ships Same Business Day
- Weight:
- 3.60 LBS
- UNITS:
- EACH
- MOUNTING STYLE:
- 6 HOLE
- RIDING STYLE:
- STREET
- STYLE:
- 10 GAUGE
- PRODUCT NAME:
- COVER
- COLOR/FINISH:
- BLACK ANODIZED
- MATERIAL:
- 6061 T-6 ALUMINUM
- TYPE:
- TRANSMISSION
MSRP: $179.95Now: $161.96Was: $179.95Qty in Cart: 0Quantity:Price:MSRP: $179.95Now: $161.96Was: $179.95Subtotal: -
On Sale
ARLEN NESS Transmission Cover - Black 03-864
ARLEN NESS
MSRP: $209.95Now: $188.96Was: $209.95The ARLEN NESS Transmission Cover replaces your OEM side cover with a precision-engineered component that maintains critical sealing while delivering a refined aesthetic upgrade. This bolt-on cover...11050248- SKU:
- 11050248
- Availability:
- Ships Same Business Day
- Weight:
- 0.95 LBS
- MATERIAL:
- 6061 T-6 ALUMINUM
- STYLE:
- 10 GAUGE
- TYPE:
- TRANSMISSION
- PRODUCT NAME:
- COVER
- UNITS:
- EACH
- COLOR/FINISH:
- BLACK ANODIZED
- MOUNTING STYLE:
- 6 HOLE
- RIDING STYLE:
- STREET
MSRP: $209.95Now: $188.96Was: $209.95Qty in Cart: 0Quantity:Price:MSRP: $209.95Now: $188.96Was: $209.95Subtotal:
