---
product_id: 256579733
title: "42904 V-Twin Primary Oil, 1 Quart, 1 Pack"
brand: "red line"
price: "2184354₫"
currency: VND
in_stock: true
reviews_count: 5
category: "Red Line"
url: https://www.desertcart.vn/products/256579733-42904-v-twin-primary-oil-1-quart-1-pack
store_origin: VN
region: Vietnam
---

# Reduces clutch wear & temp Friction-balanced formula Fits 1984+ V-Twin engines 42904 V-Twin Primary Oil, 1 Quart, 1 Pack

**Brand:** red line
**Price:** 2184354₫
**Availability:** ✅ In Stock

## Summary

> 🏍️ Ride smoother, last longer — clutch oil that powers your passion!

## Quick Answers

- **What is this?** 42904 V-Twin Primary Oil, 1 Quart, 1 Pack by red line
- **How much does it cost?** 2184354₫ with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.vn](https://www.desertcart.vn/products/256579733-42904-v-twin-primary-oil-1-quart-1-pack)

## 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

- • **Trusted Legacy:** Red Line’s proven performance since 1979—no compromises
- • **V-Twin Specific Formula:** Tailored for 1984-to-present American V-Twin motorcycles and aftermarket engines
- • **Extended Clutch Lifespan:** Reduces wear and heat to keep your ride performing longer
- • **Precision Friction Balance:** Optimized clutch grip for smoother, slip-free operation
- • **Wide Temp Range Performance:** Engineered to maintain consistency in all riding conditions

## Overview

Red Line 42904 V-Twin Primary Oil is a friction-balanced synthetic oil designed specifically for 1984 and newer American V-Twin motorcycle engines. It enhances clutch operation by reducing slip, wear, and temperature, ensuring smoother shifts and extended clutch life. Ideal for wet-diaphragm spring clutches in motorcycles, ATVs, and powersports, this oil delivers reliable performance across a wide temperature range backed by Red Line’s decades-long reputation for quality.

## Description

Red Line's V-twin primary case oil is designed specifically for 1984-to-present V-Twin American motorcycle engines, including aftermarket engines of similar designs. Similar to Red Line MTL, this product is for use in the primary chain case with wet-diaphragm spring clutches. Designed to operate over a wide temperature range, V-twin primary case oil improves clutch operation, while reducing wear and temperature. Where most synthetics are too slippery for clutch operation, this friction-balanced product is designed to provide less slip, smoother operation, and more power in modified engines

Review: For 2011 FLHRC. Has made neutral easier to find.
Review: Great oil for v twins highly recommend .

## 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 | #27,491 in Automotive ( See Top 100 in Automotive ) #406 in Automotive Oils |
| Item model number | 42904 |
| Manufacturer | Red Line |
| Product Dimensions | 9.91 x 12.45 x 22.86 cm; 771.11 g |

## Product Details

- **Brand:** Red Line
- **Liquid volume:** 32 Fluid Ounces
- **Package information:** Bottle
- **Vehicle service type:** Motorcycle, ATV, UTV
- **Viscosity:** 10W 40

## Images

![42904 V-Twin Primary Oil, 1 Quart, 1 Pack - 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

### ⭐⭐⭐⭐ Review
*by B***N on 11 November 2019*

For 2011 FLHRC. Has made neutral easier to find.

### ⭐⭐⭐⭐⭐ Review
*by B***G on 8 February 2025*

Great oil for v twins highly recommend .

### ⭐⭐⭐⭐⭐ Review
*by D***K on 29 November 2025*

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

## 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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**Shop now:** [https://www.desertcart.vn/products/256579733-42904-v-twin-primary-oil-1-quart-1-pack](https://www.desertcart.vn/products/256579733-42904-v-twin-primary-oil-1-quart-1-pack)

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*Product available on Desertcart Vietnam*
*Store origin: VN*
*Last updated: 2026-02-26*