---
product_id: 3747152
title: "42904 V-Twin Primary Case Oil, for use with UTVs, ATVs and Sportbikes - 1 Quart"
brand: "red line"
price: "$87"
currency: NZD
in_stock: true
reviews_count: 8
category: "Red Line"
url: https://www.desertcart.nz/products/3747152-42904-v-twin-primary-case-oil-for-use-with-utvs
store_origin: NZ
region: New Zealand
---

# Reduces clutch wear & heat Friction-balanced formula Fits 1984+ V-Twin engines 42904 V-Twin Primary Case Oil, for use with UTVs, ATVs and Sportbikes - 1 Quart

**Brand:** red line
**Price:** $87
**Availability:** ✅ In Stock

## Summary

> 🏍️ Ride smoother, last longer — clutch oil that means business!

## Quick Answers

- **What is this?** 42904 V-Twin Primary Case Oil, for use with UTVs, ATVs and Sportbikes - 1 Quart by red line
- **How much does it cost?** $87 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.nz](https://www.desertcart.nz/products/3747152-42904-v-twin-primary-case-oil-for-use-with-utvs)

## Best For

- red line enthusiasts

## Why This Product

- Trusted red line brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Extended Clutch Life:** Lowers wear and operating temperature to boost durability
- • **Ready-to-Use Quart Size:** Convenient 32 oz bottle for easy maintenance and refills
- • **Versatile Compatibility:** Perfect for V-Twin motorcycles, ATVs, UTVs, and sportbikes
- • **Precision Friction Balance:** Optimized clutch grip for smooth, slip-free operation
- • **Trusted Legacy Performance:** Red Line’s proven formula since 1979 ensures no compromises

## Overview

Red Line 42904 V-Twin Primary Case Oil is a friction-balanced synthetic oil designed specifically for 1984-to-present V-Twin American motorcycle engines and similar aftermarket designs. It enhances clutch performance by reducing slip, wear, and heat, extending clutch lifespan. Ideal for motorcycles, ATVs, UTVs, and sportbikes, this 1-quart bottle delivers trusted, high-performance protection from a brand established in 1979.

## Description

Buy Red Line 42904 V-Twin Primary Case Oil, for use with UTVs, ATVs and Sportbikes - 1 Quart: Engine Oil - desertcart.com ✓ FREE DELIVERY possible on eligible purchases

Review: Buy this you won’t regret it - Great stuff I always use Red Line products in my 08 Dyna lowrider.
Review: Good stuff - Great product that I've used for years

## Features

- FRICTION BALANCED CASE OIL - Most synthetics are too slippery for clutch operation. Our V-Twin Primary Case Oil is a balanced oil limiting slip and performing a smoother operation
- BOOSTS VEHICLE PERFORMANCE - Improves clutch operation while reducing wear and temperature, providing a longer clutch lifespan
- PERFORM & PROTECT - This product is for use in the primary chaincase with wet-diaphragm spring clutches. Perfect for Motorcycles, ATVs, and Powersports
- PRIMARY CASE OIL - For 1984-to-present V-Twin American motorcycle engines, including Evolution, Twin Cam, and aftermarket engines of similar design
- WHY RED LINE - Established in 1979, Red Line Products perform & protect better than any on the market. No compromises

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0053O9EUA |
| Best Sellers Rank | #20,349 in Automotive ( See Top 100 in Automotive ) #214 in Motor Oils |
| Brand | Red Line |
| Brand Name | Red Line |
| Compatible with Vehicle Type | Car |
| Container Type | Bottle |
| Customer Reviews | 4.8 out of 5 stars 2,686 Reviews |
| Flash Point | 232 Degrees Celsius |
| Global Trade Identification Number | 00083522429047 |
| Included Components | V-Twin Primary Case Oil |
| Item Type Name | Motor Oils |
| Item Weight | 1.7 Pounds |
| Liquid Volume | 32 Fluid Ounces |
| Manufacturer | Red Line |
| Manufacturer Part Number | 42904 |
| Package Information | Bottle |
| UPC | 083522429047 |
| Unit Count | 32.0 Fluid Ounces |
| Vehicle Service Type | Car |
| Viscosity | 75W/80W/75W80 sae_grade |

## Product Details

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

## Images

![42904 V-Twin Primary Case Oil, for use with UTVs, ATVs and Sportbikes - 1 Quart - Image 1](https://m.media-amazon.com/images/I/71pFEcmeYZL.jpg)

## Available Options

This product comes in different **Size** options.

## Questions & Answers

**Q: What color is the fluid?**
A: 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?**
A: 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?**
A: 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**
A: 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.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Buy this you won’t regret it
*by D***K on November 29, 2025*

Great stuff I always use Red Line products in my 08 Dyna lowrider.

### ⭐⭐⭐⭐⭐ Good stuff
*by W***M on November 26, 2025*

Great product that I've used for years

### ⭐⭐⭐⭐⭐ Excellent!
*by O***R on December 3, 2025*

Red Line has been a trusted source of oils for many years. I have used it in all of my Harley Davidson touring bikes for decades. I change my fluids regularly and have never had an engine wear issue while using Red Line full synthetic. I highly recommend Red Line for V-Twin motorcycles.

## 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

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*Product available on Desertcart New Zealand*
*Store origin: NZ*
*Last updated: 2026-02-06*