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.

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

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.

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.

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Red Line (42904) V-Twin Primary Case Oil - Engine Oil (1 Quart Bottle)

Product ID: 58725086

Details

Brand
Red Line
Flash point
232 Degrees
Liquid volume
32 Fluid
Package information
Bottle
Vehicle service type
Motorcycle

⚙️Friction-balanced for clutch & primary chain protection

🌡️Operates across wide temperature range (Flash Point 232°C)

🏍️Specifically for 1984+ V-Twin motorcycles

€ 102.51

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Description

⚡ Ride smoother, shift stronger — the clutch oil your V-Twin deserves!

WIDE THERMAL STABILITY - Maintains performance and protection from cold starts to high-heat conditions (Flash Point 232°C).
CLUTCH FRIENDLY FRICTION BALANCE - Unique formula reduces clutch slip, delivering smoother engagement and enhanced power transfer.
PRECISION ENGINEERED FOR V TWINS - Tailored synthetic oil optimized for 1984-to-present American V-Twin engines and aftermarket equivalents.
RACING PROVEN SYNTHETIC TECHNOLOGY - Developed by Red Line since 1979, trusted by enthusiasts for uncompromising performance gains.
ENHANCED WEAR TEMPERATURE CONTROL - Reduces wear on primary chain and clutch components, extending engine life and reliability.

Red Line (42904) V-Twin Primary Case Oil is a full-synthetic, friction-balanced lubricant designed specifically for 1984 and newer American V-Twin motorcycle engines. Engineered to optimize clutch operation and protect the primary chaincase, it operates effectively across a wide temperature range with a high flash point of 232°C. Trusted since 1979 by racing enthusiasts, this oil reduces wear and heat while enhancing power delivery in both stock and modified engines.

Specifications

ASIN	B0053O9EUA
Automotive Fit Type	Vehicle Specific Fit
Best Sellers Rank	261,404 in Automotive ( See Top 100 in Automotive ) 1,618 in Car Engine Oils
Brand	Red Line
Brand Name	Red Line
Compatible with Vehicle Type	Motorcycle
Container Type	Bottle
Customer Reviews	4.8 out of 5 stars 2,536 Reviews
Flash Point	232 Degrees Celsius
Flash point	232 Degrees Celsius
Global Trade Identification Number	00083522429047
Included Components	Red Line (42904) V-Twin Primary Case Oil - Engine Oil (1 Quart Bottle)
Item Type Name	Motor Oils
Item Weight	1.7 Pounds
Liquid Volume	32 Fluid Ounces
Liquid volume	32 Fluid Ounces
Manufacturer	Red Line
Manufacturer Part Number	42904
Model Number	42904
Number of Packs	1
Package information	Bottle
Part Interchange Info	42904
Size	1 Quart
UPC	083522429047
Unit Count	946.3529 millilitre
Vehicle service type	Motorcycle

Reviews

R**E

works well does the job

good product good value

23.10.2026

F**K

Excellent Primary Case Oil!

This stuff is great and I think should be the factory choice. Product works very well and definitely costs a bit more than the dealer recommended product but I like the difference and it works very well in my M8!

14.10.2026

M**S

Put it to the test

Performed an oil change prior to a 4600 km road trip. This bike was new to me and therefore wanted my first trip with new oil. Went through some extreme temperatures on the trip and no issues to report. Good products.

15.07.2024

B**N

Works well

For 2011 FLHRC. Has made neutral easier to find.

11.11.2019

P**.

Longevity

So far so good

6.10.2026

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Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

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Fantastic experience overall. Will recommend to friends and family.

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Fast shipping and excellent packaging. The Leatherman tool feels very premium and sturdy.

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€ 102.51

Duties & taxes included

In stock

Sold byAmazon CyprusDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Cyprus.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Imran F.

Very reliable shop with genuine products. Will definitely buy again!

2 weeks ago

Ayesha M.

The product exactly matches the description. Very satisfied with my purchase.

5 days ago

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