Harley X440 / X440 OBDII / X440T / X440X / Mavrick 440 Front Brake Caliper Piston Set OEM | HDH06451ACA000

Replace worn, seized, leaking, or damaged front brake caliper pistons with this OEM front brake caliper piston set for Harley X440 and Hero Mavrick 440 platform motorcycles. Part number HDH06451-ACA-000 is listed as PISTON SET in the brake caliper group. In buyer language, this is best understood as a front brake caliper piston set, front caliper piston kit, or front brake piston set.

This part is used inside the front brake caliper assembly. If the front brake is dragging, caliper pistons are jammed, the piston surface is corroded or scored, or the caliper is being rebuilt after wear or damage, replacing the piston set is often part of a proper repair.

This listing is written to be easier for customers to understand. Instead of only using the factory term PISTON SET, it also uses the common buyer names: front brake caliper piston set, front caliper piston kit, and front brake piston set.

Compatibility as requested: Harley X440, X440 OBDII, X440T, X440X, and Hero Mavrick 440. Before ordering, please match your old part, caliper design, and exact bike application. Brake parts should never be purchased only by guess or by symptom alone.

This listing is for the front brake caliper piston set only. Do not assume it includes caliper seals, dust boots, slide pins, brake pads, caliper bracket, complete caliper, brake hose, or mounting hardware unless separately stated.

Key Features

• Genuine OEM front brake caliper piston set
• Part number: HDH06451-ACA-000
• Factory description: PISTON SET
• Buyer language: front brake caliper piston set / front caliper piston kit
• Used in the front brake caliper assembly
• Suitable for caliper repair or rebuild work
• Useful when old pistons are scored, seized, corroded, or leaking after damage
• Clear return-prevention copy for a technical brake component
• Helps buyers understand this is an internal caliper part, not a complete caliper
• OEM-style fit for the listed applications

Compatibility

What's in the Box

• 1 x HDH06451-ACA-000 – Front Brake Caliper Piston Set

Installation & Maintenance Notes

• This listing is for the piston set only.
• It is not a complete front brake caliper.
• Please match the old part and caliper design before ordering.
• Inspect seals, dust boots, caliper bore condition, pads, and brake fluid condition during rebuild.
• Brake work should be done carefully and correctly. If unsure, use a qualified mechanic.

Before You Order

Important: This is an internal front brake caliper part. It is not the full caliper, not the caliper bracket, and not the brake pad set.

If your brake issue is only weak braking, dragging, or noise, do not order this part only on assumption. Confirm that the pistons are actually worn, damaged, or seized before purchase.

Why Buy From Under The Hood

• Buyer-friendly naming for technical OEM parts
• Clear explanation of what the part actually does
• Helpful distinction between piston set and complete caliper parts
• Better for workshops and customers who need exact brake rebuild parts

FAQs

1. What is HDH06451-ACA-000?
It is the OEM front brake caliper piston set, listed by the factory as PISTON SET.

2. Is this a complete front caliper?
No. This is only the piston set used inside the front brake caliper.

3. Are seals or rubber parts included?
Do not assume that. This listing is only for the piston set unless other items are separately stated.

4. Which bikes is this listed for?
This listing is made for Harley X440, X440 OBDII, X440T, X440X, and Hero Mavrick 440.

5. When should this part be replaced?
Replace it when caliper pistons are seized, corroded, leaking after damage, scored, or worn during caliper rebuild.

6. Is this front or rear brake related?
This is for the front brake caliper.

7. What should be checked before ordering?
Please confirm the exact bike application, old part match, and whether you need only the piston set or a complete caliper repair kit.