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.

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

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

Product ID: 58725086

Secure Transaction

Details

Brand
Red Line
Liquid volume
32 Fluid
Package information
Bottle
Vehicle service type
Motorcycle
Viscosity
75W/80W/75W80

🔥Flash Point 232°C - High-temp resilience

⚙️Friction-balanced formula - Optimized clutch grip

🏍️Specifically for 1984+ V-Twin engines - Perfect fit

Description

🏍️ Own the Ride: Power, Precision & Protection in Every Drop

TAILORED FOR V TWINS - Engineered specifically for 1984-to-present American V-Twin motorcycles and compatible aftermarket engines.
PROVEN RACING HERITAGE - Backed by Red Line’s legacy since 1979, trusted by enthusiasts and racers for uncompromising quality.
ENHANCED WEAR PROTECTION - Reduces wear and heat in primary chaincases, extending engine life and maintaining peak efficiency.
PRECISION CLUTCH CONTROL - Friction-balanced synthetic oil reduces slip for smoother, more powerful clutch engagement.
EXTREME TEMPERATURE STABILITY - Operates flawlessly across wide temperature ranges with a 232°C flash point for peak performance.

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. With a high flash point of 232°C and optimized viscosity (75W/80W), it ensures superior clutch performance, reduces wear, and operates reliably across extreme temperatures. Trusted since 1979, this oil delivers race-proven technology for enthusiasts demanding peak power and protection.

Specifications

ASIN	B0053O9EUA
Best Sellers Rank	77,233 in Automotive ( See Top 100 in Automotive ) 720 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 2,442 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
Package information	Bottle
UPC	083522429047
Unit Count	946.3529 millilitre(s)
Vehicle service type	Motorcycle
Viscosity	75W/80W/75W80 sae_grade

Reviews

B**N

Works well

11.11.2019

J**J

Best oil

14.09.2025

M**S

Put it to the test

15.07.2024

J**.

Redline makes the best oil for Harleys that I have used.

18.10.2025

B**1

Great product

13.03.2025

Common Questions

Are the products genuine and authentic?+

Yes, all products are sourced directly from authorized retailers in the US, UK, UAE and India. We maintain strict quality control processes and verify each product before shipping. All items come with applicable manufacturer warranties and are covered by our standard return policy.

How long does delivery take and is it reliable?+

Delivery times vary by destination country, typically ranging from 3-9 business days. Each order is fully trackable through our system. We handle all customs clearance and use reliable courier partners for last-mile delivery. You'll receive regular updates about your order status via email and our app.

What is Desertcart? Is it safe to order from?+

Desertcart is an international e-commerce platform operating since 2014. We securely process thousands of orders globally each day. Every product goes through our quality verification process before delivery, and we provide end-to-end order tracking, 24/7 customer support, and a comprehensive returns policy to ensure a safe shopping experience.

How is product pricing calculated?+

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.

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Anjali K.

The product quality is outstanding. Exactly what I needed for my work.

1 month ago

Meera L.

Smooth transaction and product arrived in perfect condition.

3 weeks ago

View all Trustpilot reviews

Shop Global, Save with Desertcart

Value for Money

Competitive prices on a vast range of products

Shop Globally

Serving millions of shoppers across more than 100 countries

Enhanced Protection

Trusted payment options loved by worldwide shoppers

Customer Assurance

Trusted payment options loved by worldwide shoppers.

Desertcart App

Shop on the go, anytime, anywhere.

10968 kr

Duties & taxes incl.

Icelandstore

Free Returns

30 daysfor PRO membership users

15 dayswithout membership

Secure Transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Pooja R.

The customer service exceeded my expectations. Perfect for buying products you can't find elsewhere.

1 week ago

Suresh K.

Very impressed with the quality and fast delivery. Will shop here again.

4 days ago

View all Trustpilot reviews