Red Line 42904 V-Twin Primary Case Oil - Quart
Red Line 42904 V-Twin Primary Case Oil - Quart
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Red Line 42904 V-Twin Primary Case Oil - Quart

4.8 stars out of 10 reviews
(4.8)|
10 ratings

Key item features

  • Balanced Friction: This primary case oil is friction-balanced to limit slip and ensure smoother clutch operation, unlike many synthetics that are too slippery.
  • Enhanced Performance: Improves clutch function, reduces wear, and lowers operating temperature, contributing to a longer clutch lifespan.
  • Specific Application: Designed for use in primary chaincases equipped with wet-diaphragm spring clutches.
  • Engine Compatibility: Formulated for 1984-to-present V-Twin American motorcycle engines, including Evolution, Twin Cam, and similar aftermarket designs.
  • Wide Temperature: Engineered to operate effectively across a broad range of temperatures.
  • Reduced Wear: The oil's formulation actively works to decrease wear on clutch components.
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Current price is $21.87
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Columbus, 43215
Arrives by Fri, Apr 17
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Sold and shipped by R/A Hoerr Incorporated
4.503194888178914 stars out of 5, based on 1252 seller reviews(4.5)
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4.8 out of 5 stars
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Showing 1-3 of 6 reviews

Nov 4, 2025
boys
Sold and shipped byPerformance Guarantee
5 out of 5 stars review

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Good Stuff

I Used Red Line 42904 V-Twin Primary Case Oil in my 2005 Harley Davidson FXDLI since the first maintenance interval about 1,500 miles. I always change the primary oil and transmission oil when I change the engine oil. Now at 122,000 miles I can say I have had no problems with the clutch or anything in the primary case.

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Sep 29, 2025
doug
Sold and shipped byR/A Hoerr Incorporated
5 out of 5 stars review

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Red line makes a very good product

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Helpful?57PQT4AQO4B8755457466
Feb 16, 2026
don
Sold and shipped byR/A Hoerr Incorporated
5 out of 5 stars review

Verified Purchase

v-twin 96cc

2008 Rocker C great product

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Helpful?57PQT4AQO4B8755457466