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20 Best Oil For Harley Transmission And Primary (2022 Updated)

The oil for a Harley transmission is a special kind of oil that is designed to lubricate the moving parts of the transmission. The oil for the primary is also a special kind of oil that is designed to lubricate the moving parts of the primary drive.

20 Best Oil For Harley Transmission And Primary

Product Image Product Name Features Price

Red Line 42804: V-Twin Transmission Oil Quart

  • V-Twin Transmission Oil with ShockProof – 1 qt.
  • For all H-D trans including with Evolution engines, Twin Cam engines, and latest 6-speed Cruise Drive.

Redline V-Twin Manual Transmission Fluid 1 qt P/N 42804

  • Each gear oil product reduces the thinning effect from high temperatures.
  • Motor oils are packed with higher levels of anti-wear chemistry like zinc and phosphorus.

R.hdpg6 Spectro Platinum 6 Speed Heavy Duty Full Syn Trans Oil

  • Cures noisy six speed transmissions
  • Smoother shifting, reduces fifth gear whine and eliminates clunks
  • High loads and extreme heat do not affect the oil

Bel-Ray – 96905-BT4 – V-Twin Mineral Engine Oil 20W-50 4L

  • Delivers outstanding protection
  • Exceeds all OEM specifications
  • Long change intervals

Red Line 20w50 Motorcycle Oil – 1 Quart

  • Superior film strength through the use of ester base stocks for protection and ring seal
  • Extended drain intervals over other brands due to higher quality base stocks and excellent dispersants

Red Line 42904 V-Twin Primary Case Oil – 1qt.

  • Same fluid as our famous MTL gear oil.
  • This product is for use in the primary chaincase with wet-diaphragm spring clutches.

AMSOIL 20W-50 Synthetic V-Twin Motorcycle Oil

  • 1 Gallon

Klotz V-Twin Transmission Oil 80W-90

  • American V-Twin Transmission Lubricant 80w-90 32 Fl. Oz

Red Line 42804 V-Twin Transmission Oil with Shockproof 1 qt

  • For all aftermarket versions like Baker, JIMS, S&S, etc.
  • For all H-D trans including with Milwaukee-Eight engines, Evolution engines, Twin Cam engines and latest 6-speed Cruise Drive.

Lucas SAE 20W-50 High-Performance Synthetic Motorcycle Oil – 1 qt bottle

  • 1qt

Bel-Ray 96920-BT1 Primary Chaincase Lubricant 1L

  • Formulated for primary chains and wet clutches
  • Wear protection extends transmission life
  • Prevents clutch slipping and chatter for consistent engagement

Bel-Ray V-Twin Semi-Synthetic Engine Oil 20W-50 1L

  • V-Twin Semi-Synthetic Engine Oil 20w-50 1L

Klotz KH-C80 V-Twin Primary Case Oil

  • Reduces clutch temperature, clutch slippage and grabbing, and provides protection from shock loading and galling
  • Penetrates deep into chain rollers to loosen stiff links and extend chain and sprocket life

Red Line 90231 – Big Twin 20W60HD PowerPack

  • High quality construction and durability
  • Impressive designs to add to the decor
  • Variety of styles for every type of accessory

Red Line 42804 V-Twin Transmission Oil, 1 Quart,

  • Note: Product Image May Not Be Vehicle Specific
  • This Product Dampens Transmission Noise
  • Gear Oils Are Specifically Engineered For The Latest High-Revving Four-Stroke Motocross Bikes And Atvs Sport Bikes

Motul 7100 Synthetic Oil 20w50 – 1 Liter

  • Ester technology that provides better lubricity when cold.
  • Very good lubricating properties.
  • Designed for modern motorcycle engines Specifications / Performance SAE 10W-40 API SJ / SL JASO MA-2.

Castrol Power 1 V-Twin 4T Synthetic 20W50 1 qt

  • Race-derived technology for maximum engine acceleration
  • Extreme high temperature air-cooled performance and water-cooled engine performance

Motul 7100 4T Oil

  • 4t 10w50

AMSOIL SAE 60 Synthetic V-Twin Motorcycle Oil

  • Reduces Friction, Heat and Wear
  • Extreme Pressure Protection for Gears
  • Superior Rust Protection
Red Line 42804: V-Twin Transmission Oil Quart
  • V-Twin Transmission Oil with ShockProof – 1 qt.
  • For all H-D trans including with Evolution engines, Twin Cam engines, and latest 6-speed Cruise Drive.
Redline V-Twin Manual Transmission Fluid 1 qt P/N 42804
  • Each gear oil product reduces the thinning effect from high temperatures.
  • Motor oils are packed with higher levels of anti-wear chemistry like zinc and phosphorus.
R.hdpg6 Spectro Platinum 6 Speed Heavy Duty Full Syn Trans Oil
  • Cures noisy six speed transmissions
  • Smoother shifting, reduces fifth gear whine and eliminates clunks
  • High loads and extreme heat do not affect the oil
Bel-Ray – 96905-BT4 – V-Twin Mineral Engine Oil 20W-50 4L
  • Delivers outstanding protection
  • Exceeds all OEM specifications
  • Long change intervals
Red Line 20w50 Motorcycle Oil – 1 Quart
  • Superior film strength through the use of ester base stocks for protection and ring seal
  • Extended drain intervals over other brands due to higher quality base stocks and excellent dispersants
Red Line 42904 V-Twin Primary Case Oil – 1qt.
  • Same fluid as our famous MTL gear oil.
  • This product is for use in the primary chaincase with wet-diaphragm spring clutches.
AMSOIL 20W-50 Synthetic V-Twin Motorcycle Oil
  • 1 Gallon
Klotz V-Twin Transmission Oil 80W-90
  • American V-Twin Transmission Lubricant 80w-90 32 Fl. Oz
Red Line 42804 V-Twin Transmission Oil with Shockproof 1 qt
  • For all aftermarket versions like Baker, JIMS, S&S, etc.
  • For all H-D trans including with Milwaukee-Eight engines, Evolution engines, Twin Cam engines and latest 6-speed Cruise Drive.
Lucas SAE 20W-50 High-Performance Synthetic Motorcycle Oil – 1 qt bottle
  • 1qt
Bel-Ray 96920-BT1 Primary Chaincase Lubricant 1L
  • Formulated for primary chains and wet clutches
  • Wear protection extends transmission life
  • Prevents clutch slipping and chatter for consistent engagement
Bel-Ray V-Twin Semi-Synthetic Engine Oil 20W-50 1L
  • V-Twin Semi-Synthetic Engine Oil 20w-50 1L
Klotz KH-C80 V-Twin Primary Case Oil
  • Reduces clutch temperature, clutch slippage and grabbing, and provides protection from shock loading and galling
  • Penetrates deep into chain rollers to loosen stiff links and extend chain and sprocket life
Red Line 90231 – Big Twin 20W60HD PowerPack
  • High quality construction and durability
  • Impressive designs to add to the decor
  • Variety of styles for every type of accessory
Red Line 42804 V-Twin Transmission Oil, 1 Quart,
  • Note: Product Image May Not Be Vehicle Specific
  • This Product Dampens Transmission Noise
  • Gear Oils Are Specifically Engineered For The Latest High-Revving Four-Stroke Motocross Bikes And Atvs Sport Bikes
Motul 7100 Synthetic Oil 20w50 – 1 Liter
  • Ester technology that provides better lubricity when cold.
  • Very good lubricating properties.
  • Designed for modern motorcycle engines Specifications / Performance SAE 10W-40 API SJ / SL JASO MA-2.
Castrol Power 1 V-Twin 4T Synthetic 20W50 1 qt
  • Race-derived technology for maximum engine acceleration
  • Extreme high temperature air-cooled performance and water-cooled engine performance
Motul 7100 4T Oil
  • 4t 10w50
AMSOIL SAE 60 Synthetic V-Twin Motorcycle Oil
  • Reduces Friction, Heat and Wear
  • Extreme Pressure Protection for Gears
  • Superior Rust Protection

1. Bel-Ray 96900-BT1 Big Twin Transmission Oil 1L

Bel-Ray 96900-BT1 Big Twin Transmission Oil 1L

Check Latest Price

Sold By Price
Amazon.com
eBay
Walmart
Cycle Gear

Product Details

Specifications

Details
Collections Featured, Oil & Lubrication, Street
Style Big Twin
Dispenser Type Bottle
Viscosity (Weight) 85W-140
Application 4-Stroke
Riding Style Street
Length 8.26

Reviews From Real Customers

ltbshoplyall
partimetrucker

2. Red Line 42804: V-Twin Transmission Oil Quart

Red Line 42804: V-Twin Transmission Oil Quart

  • V-Twin Transmission Oil with ShockProof – 1 qt.
  • For all H-D trans including with Evolution engines, Twin Cam engines, and latest 6-speed Cruise Drive.
  • For all aftermarket versions like Baker, JIMS, S&S, etc.
  • Same fluid as Redline’s unique Heavy ShockProof Gear Oil.
  • Motor oils and gear oils are specifically engineered for the latest high-revving four-stroke motocross bikes and ATVs, Sportbikes, and V-Twins.

Check Latest Price

Sold By Price
Amazon.com
eBay
Walmart – Hoerr Racing Products
DragRacingWheels.com

Product Details

Specifications

Details
Capacity 1 qt.
Fit Type Vehicle Specific
Assembled Product Weight 10 lb
Motor Oil Viscosity Transmission Oil

3. Redline V-Twin Manual Transmission Fluid 1 qt P/N 42804

Redline V-Twin Manual Transmission Fluid 1 qt P/N 42804

  • Each gear oil product reduces the thinning effect from high temperatures.
  • Motor oils are packed with higher levels of anti-wear chemistry like zinc and phosphorus.
  • Special friction modifiers in our motor oils better wet-clutch operation.
  • A variety of Two-Stroke oils to meet the NMMA TC-W3 regulations where required.
  • For all aftermarket versions like Baker, JIMS, S&S, etc.

Check Latest Price

Sold By Price
Amazon.com – Seller
eBay
Walmart
J&P Cycles

Product Details

Specifications

Details
Weight 2.15 oz

Reviews From Real Customers

munnkii

4. R.hdpg6 Spectro Platinum 6 Speed Heavy Duty Full Syn Trans Oil

R.hdpg6 Spectro Platinum 6 Speed Heavy Duty Full Syn Trans Oil

  • Cures noisy six speed transmissions
  • Smoother shifting, reduces fifth gear whine and eliminates clunks
  • High loads and extreme heat do not affect the oil

Check Latest Price

Sold By Price
Amazon.com – Seller
eBay
Walmart
Chaparral Motorsports

Product Details

Specifications

Details
Piece Count 1
Count Per Pack 1
Count 1
Multipack Quantity 1

Reviews From Real Customers

Robert L Bishop
jhaz-64
jjj-5729

5. Bel-Ray – 96905-BT4 – V-Twin Mineral Engine Oil 20W-50 4L

Bel-Ray - 96905-BT4 - V-Twin Mineral Engine Oil 20W-50 4L

  • Delivers outstanding protection
  • Exceeds all OEM specifications
  • Long change intervals
  • Excellent transmission and wet clutch performance for V-Twins with shared transmissions compartments

Check Latest Price

Sold By Price
Amazon.com – Seller
eBay
Walmart
Cycle Gear

Product Details

Specifications

Details
Part Type Engine Oil
Oil Type Mineral
Oil Weight 20W50
ZDDP Enhanced No
API Rating SN

6. Red Line 20w50 Motorcycle Oil – 1 Quart

Red Line 20w50 Motorcycle Oil - 1 Quart

  • Superior film strength through the use of ester base stocks for protection and ring seal
  • Extended drain intervals over other brands due to higher quality base stocks and excellent dispersants
  • Blended with specific friction modifiers that are compatible with wet-clutches, suitable for JASO MA applications

Check Latest Price

Sold By Price
Amazon.com – Seller
eBay
Walmart
Cycle Gear

Product Details

Specifications

Details
Weight 2.05 oz

7. Red Line 42904 V-Twin Primary Case Oil – 1qt.

Red Line 42904 V-Twin Primary Case Oil - 1qt.

  • Same fluid as our famous MTL gear oil.
  • This product is for use in the primary chaincase with wet-diaphragm spring clutches.
  • Improves clutch operation while reducing wear and temperature.

Product Details

Specifications

Details
Engine Oil Weight 5W-30
Engine Oil Type Synthetic

Reviews From Real Customers

DONALD
CHADWICK

8. AMSOIL 20W-50 Synthetic V-Twin Motorcycle Oil

AMSOIL 20W-50 Synthetic V-Twin Motorcycle Oil

  • Resists extreme heat
  • Retains viscosity for excellent wear protection
  • Convenience of one lubricant for all three sumps
  • Package Dimensions: 16.0 L X 26.5 H X 11.0 W (centimeters)

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Sold By Price
Amazon
AMSOIL

Product Details

Specifications

Details
Product Dimensions 6.3 x 4.33 x 10.43 inches
Is Discontinued By Manufacturer No
Viscosity 20W-50

9. Klotz V-Twin Transmission Oil 80W-90

Klotz V-Twin Transmission Oil 80W-90

  • American V-Twin Transmission Lubricant 80w-90 32 Fl. Oz

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Sold By Price
Amazon
eBay
Summit Racing
Dennis Kirk

Product Details

Specifications

Details
Collections Oil & Lubrication, Street
Application 4-Stroke
Container Size 946 ml
Viscosity (Weight) 80W-90
Riding Style Street

10. Red Line 42804 V-Twin Transmission Oil with Shockproof 1 qt

Red Line 42804 V-Twin Transmission Oil with Shockproof 1 qt

  • For all aftermarket versions like Baker, JIMS, S&S, etc.
  • For all H-D trans including with Milwaukee-Eight engines, Evolution engines, Twin Cam engines and latest 6-speed Cruise Drive.
  • Same fluid as our unique Heavy ShockProof Gear Oil.

Check Latest Price

Sold By Price
Amazon
eBay
Cycle Gear
Torqued

Product Details

11. Lucas SAE 20W-50 High-Performance Synthetic Motorcycle Oil – 1 qt bottle

Lucas SAE 20W-50 High-Performance Synthetic Motorcycle Oil - 1 qt bottle

  • 1qt

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Amazon
eBay
Walmart
AutoZone

Product Details

Specifications

Details
Weight 1.99 oz

12. Bel-Ray 96920-BT1 Primary Chaincase Lubricant 1L

Bel-Ray 96920-BT1 Primary Chaincase Lubricant 1L

  • Formulated for primary chains and wet clutches
  • Wear protection extends transmission life
  • Prevents clutch slipping and chatter for consistent engagement
  • Distinctive red color makes leak detection easy
  • All temperature reliability

Check Latest Price

Sold By Price
Amazon
eBay
Walmart
Speed Addicts

Product Details

Specifications

Details
Part Type Gear Oil
Oil Weight 80W
Limited Slip Additive No
Gear Lube Volume 1 liter
Synthetic No

Reviews From Real Customers

PAUL
tondomingue_42
mar-lee

13. Bel-Ray V-Twin Semi-Synthetic Engine Oil 20W-50 1L

Bel-Ray V-Twin Semi-Synthetic Engine Oil 20W-50 1L

  • V-Twin Semi-Synthetic Engine Oil 20w-50 1L

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Sold By Price
Amazon
eBay
Walmart
FC-Moto

Product Details

Specifications

Details
Part Type Engine Oil
Oil Type Semi-synthetic
Oil Weight 20W50
ZDDP Enhanced No
API Rating SN

Reviews From Real Customers

corkysou_2
terry9078
ladycat

14. Klotz KH-C80 V-Twin Primary Case Oil

Klotz KH-C80 V-Twin Primary Case Oil

  • Reduces clutch temperature, clutch slippage and grabbing, and provides protection from shock loading and galling
  • Penetrates deep into chain rollers to loosen stiff links and extend chain and sprocket life
  • Protects gears from shock loading and galling
  • Extends clutch life
  • Formulated with the highest quality base stocks and additives

Check Latest Price

Sold By Price
Amazon
eBay
Walmart
Active Powersports

Product Details

Specifications

Details
Collections Featured, Oil & Lubrication, Street
Style Primary
Dispenser Type Bottle
Viscosity (Weight) 80W-90
Container Size 946 ml

15. Red Line 90231 – Big Twin 20W60HD PowerPack

Red Line 90231 - Big Twin 20W60HD PowerPack

  • High quality construction and durability
  • Impressive designs to add to the decor
  • Variety of styles for every type of accessory

Check Latest Price

Sold By Price
Amazon
eBay
Walmart
RevZilla.com

Product Details

Specifications

Details
Length 16.5 in
Height 8.3 in
Width 9.4 in
Weight 15.7 lb

16. Red Line 42804 V-Twin Transmission Oil, 1 Quart,

Red Line 42804 V-Twin Transmission Oil, 1 Quart,

  • Note: Product Image May Not Be Vehicle Specific
  • This Product Dampens Transmission Noise
  • Gear Oils Are Specifically Engineered For The Latest High-Revving Four-Stroke Motocross Bikes And Atvs Sport Bikes

Check Latest Price

Sold By Price
Amazon
eBay
Walmart – Hoerr Racing Products

Product Details

Specifications

Details
Assembled Product Weight 2.3 oz

17. Motul 7100 Synthetic Oil 20w50 – 1 Liter

Motul 7100 Synthetic Oil 20w50 - 1 Liter

  • Ester technology that provides better lubricity when cold.
  • Very good lubricating properties.
  • Designed for modern motorcycle engines Specifications / Performance SAE 10W-40 API SJ / SL JASO MA-2.

Check Latest Price

Sold By Price
Amazon
eBay
Walmart
RevZilla.com

Product Details

Specifications

Details
Weight 4.53 oz

18. Castrol Power 1 V-Twin 4T Synthetic 20W50 1 qt

Castrol Power 1 V-Twin 4T Synthetic 20W50 1 qt

  • Race-derived technology for maximum engine acceleration
  • Extreme high temperature air-cooled performance and water-cooled engine performance
  • Excellent shear stability to prevent viscosity breakdown
  • Superior high speed engine protection to help extend engine life
  • Outstanding oil consumption and control, gear shift quality and wet clutch performance

Product Details

Specifications

Details
Weight 1.96 oz

19. Motul 7100 4T Oil

Motul 7100 4T Oil

  • 4t 10w50

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Amazon
eBay.it
eBay
eBay IT – franco7720

Product Details

Specifications

Details
Capacità litri 4
Tipo confezione Lattina
Classe di viscosità secondo SAE 10W-50
Specifica secondo API SL / SM / SN / SG / SH / SJ
Specifica secondo JASO MA2

Reviews From Real Customers

Mentor V Twin
adrien
2fortheshow

20. AMSOIL SAE 60 Synthetic V-Twin Motorcycle Oil

AMSOIL SAE 60 Synthetic V-Twin Motorcycle Oil

  • Reduces Friction, Heat and Wear
  • Extreme Pressure Protection for Gears
  • Superior Rust Protection
  • Excellent Wet-Clutch Performance
  • Recommended for Use in Harley Davidson’s Flathead, Knucklehead, Panhead, and Shovelhead

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AMSOIL

Product Details

Conclusion

The main conclusion of oil for harley transmission and primary is that it helps to keep the engine and transmission cooler, and also helps to reduce wear and tear on the engine and transmission.

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