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Premium motorcycle parts & accessories
Nationwide delivery in 1–3 days
Trusted by thousands of riders across the USA
Free Shipping on orders over $99
Save $10 with code WYLD10 on $100+ orders
Premium motorcycle parts & accessories
Nationwide delivery in 1–3 days
Trusted by thousands of riders across the USA
🔥Spend $100, Save $10 - Use Code:
WYLD10 at Checkout
Free Shipping on orders over $99
Save $10 with code WYLD10 on $100+ orders
Premium motorcycle parts & accessories
Nationwide delivery in 1–3 days
Trusted by thousands of riders across the USA
Free Shipping on orders over $99
Save $10 with code WYLD10 on $100+ orders
Premium motorcycle parts & accessories
Nationwide delivery in 1–3 days
Trusted by thousands of riders across the USA
Chrome Master Cylinder for 82–95 Big Twin and XL Riders
The Bikers Choice Big Twin Chrome Master Cylinder 5/8in is made for riders who want reliable braking, clean chrome style, and a direct replacement fit. If you ride an 82–95 Harley-Davidson Big Twin or XL with a single disc setup, this master cylinder is designed to bolt on with confidence. It replaces H-D part number 45019-85, making it a smart choice for repairs or custom builds.This unit delivers a smooth brake feel and consistent pressure. The 5/8-inch bore is ideal for single disc systems, helping you maintain strong control without harsh lever pull. It is built for riders who value safety, comfort, and classic looks.Designed for Control You Can Feel
Braking is not just about stopping. It is about control. The Bikers Choice Big Twin Chrome Master Cylinder 5/8in is tuned to give steady pressure at the lever. This makes braking predictable in traffic and calm on long rides. You get a firm response without extra effort from your hand.Riders upgrading worn or leaking stock units will notice the difference right away. The brake lever feels smoother. Modulation is easier. Confidence goes up.Built to Replace H-D 45019-85 with Ease
This master cylinder is designed to replace Harley-Davidson part number 45019-85. That means fewer questions during install and no guessing with fitment. It is made for single-disc front brake systems on compatible Big Twin and XL models from 1982 to 1995.For builders and shops, this saves time. For riders, it means less hassle and faster turnaround.Clean Chrome Finish That Matches Your Bike
The chrome finish is more than cosmetic. It protects the housing from corrosion and wear. At the same time, it delivers a clean, classic look that fits perfectly on custom and restored Harley builds.Whether your bike is a daily rider or a weekend showpiece, this master cylinder keeps the bars looking sharp.Key Features and Real Rider Benefits
- 5/8-inch bore size Ideal for single disc brakes. Balanced lever feel and control.
- Single disc design Matches factory-style braking systems.
- Direct replacement for H-D 45019-85 Simple install. No modification needed.
- Chrome-plated housing Resists corrosion. Enhances handlebar appearance.
- Built for 82–95 Big Twin and XL models Proven fit for classic Harley platforms.
- Smooth internal operation Improves brake response and rider confidence.
Product Specifications
- Brand: BKC Handlebars
- Bore Size: 5/8 inch
- Brake Type: Single disc
- Finish: Chrome
- Replacement For: Harley-Davidson 45019-85
- Application: Front brake master cylinder
- Part Number: 490745
Who This Master Cylinder Is For
This product is ideal for riders restoring older Harley models, fixing worn brake components, or building clean custom handlebars. It suits riders who want factory-style performance with an upgraded appearance.If you value control, safety, and classic chrome style, this master cylinder belongs on your bike.Frequently Asked Questions (FAQs)
1. What bikes does this master cylinder fit?
It fits 1982–1995 Harley-Davidson Big Twin and XL models with a single disc front brake.2. What does 5/8-inch bore mean?
It refers to the internal piston size. A 5/8-inch bore provides a smooth brake feel for single disc systems.3. Is this a direct replacement for H-D 45019-85?
Yes. It is designed to replace Harley-Davidson part number 45019-85.4. Can this be used on dual-disc setups?
No. It is designed for single-disc brake systems only.5. Does it come with a chrome finish?
Yes. It features a polished chrome housing for durability and style.6. Is this good for custom handlebars?
Yes. It pairs well with custom bars and classic Harley builds. The Bikers Choice Big Twin Chrome Master Cylinder 5/8in delivers dependable braking, clean chrome style, and a proven replacement fit for classic Harley models. It is a practical upgrade that improves control while keeping your handlebars looking right. Built for riders who expect performance and appearance to work together.3 reviews for Bikers Choice 82-95 Big Twin/XL Chrome 5/8in Bore Master Cylinder Single Disc Replaces H-D 45019-85
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Chris Moore –
Excellent replacement master cylinder. Fit perfectly, bled easily, and brake feel is firm and consistent.
Conor Matthews –
Quality chrome finish and solid internal construction. My old master cylinder was leaking and this fixed everything.
Deestev –
Perfect OEM replacement for my Evo Big Twin. The 5/8 bore is correct and it works flawlessly.