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42904 V-Twin Primary Case Oil, for use with UTVs, ATVs and Sportbikes - 1 Quart

42904 V-Twin Primary Case Oil, for use with UTVs, ATVs and Sportbikes - 1 Quart

Q: What color is the fluid?

The primary case fluid is amber colored. You may be thinking about the Heavy Shockproof Transmission fluid which is pink.

Q: Can this be used in a can am outlander atv?

this is for a wet clutch where the transmission and primary do not share the same fluid

Q: Any compatibility issues removing amsoil from primary and replacing with red line?

Don't know I was running HD primary oil but I don't think there would be any issues it doesn't circulate through the engine or tranny.

Q: What computer part on my Harley-Davidson can I put on and hook up to the computer to get in more rapid response from my throttle

You need a tuner from Harley, or another maker,TTS3 , etc. and program to be able to talk to your CPU . The connection is under my seat,it differs with year and model bike.

Product ID: 3747152

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Details

Viscosity
75W/80W/75W80
Brand
Red Line
Liquid Volume
32 Fluid
Package Information
Bottle
Vehicle Service Type
Car

🔥Reduces clutch wear & heat

⚙️Friction-balanced formula

🏍️Universal fit for V-Twin engines

Frequently Bought Together

Red Line 42904 V-Twin Primary Case Oil, for use with UTVs, ATVs and Sportbikes - 1 Quart

Red Line 42804 V-Twin Transmission Oil with Shockproof - 4 Quarts

K&N Motorcycle Oil Filter: High Performance, Premium, Designed to be used with Synthetic or Conventional Oils: Fits Select Harely Davidson Motorcycles, KN-171B

Description

🏍️ Ride smoother, last longer—unlock your V-Twin’s true potential!

PREMIUM SYNTHETIC BLEND - Delivers smooth operation where typical synthetics fail, no compromises
VERSATILE COMPATIBILITY - Fits 1984-to-present V-Twin American motorcycles, ATVs, UTVs, and sportbikes
ENHANCED CLUTCH LONGEVITY - Cuts wear and heat, extending your clutch’s lifespan under pressure
PRECISION FRICTION BALANCE - Optimized clutch grip without slip for seamless power delivery
TRUSTED LEGACY PERFORMANCE - From Red Line since 1979—industry-leading protection and power boost

Red Line’s 42904 V-Twin Primary Case Oil is a friction-balanced synthetic oil designed specifically for primary chaincases with wet-diaphragm spring clutches. Compatible with 1984-to-present V-Twin American motorcycle engines and powersports vehicles, it reduces clutch slip, wear, and operating temperature, ensuring enhanced performance and extended clutch life. Trusted since 1979, this 1-quart oil delivers superior protection and smooth operation for your ride.

Specifications

Viscosity	75W/80W/75W80 sae_grade
Brand	Red Line
Vehicle Service Type	Car
Flash Point	232 Degrees Celsius
UPC	083522429047
Automotive Fit Type	Universal Fit
Global Trade Identification Number	00083522429047
Manufacturer	Red Line
Size	1 Quart
Model	42904
Item Weight	0.634 ounces
Product Dimensions	3.9 x 4.9 x 9 inches
Item model number	42904
Is Discontinued By Manufacturer	No
Exterior	Painted
Manufacturer Part Number	42904
OEM Part Number	42904

Have a Question? See What Others Asked

What color is the fluid?

Can this be used in a can am outlander atv?

Any compatibility issues removing amsoil from primary and replacing with red line?

What computer part on my Harley-Davidson can I put on and hook up to the computer to get in more rapid response from my throttle

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