Yamaha YFZ 450R Engine

REV6

Yamaha YFZ 450R Engine

$2,275.00
In Stock
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SKU:
RV6CE-YAMYFZ450R-1
Condition:
New
Shipping:
Free Shipping (2-3 Business Days)
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About The Product

  • Send in your Yamaha YFZ 450R engine for a REV6 rebuild—built for strong throttle response, nationwide shipping, warranty-backed support, and hard-riding reliability.
  • Yamaha YFZ 450R Engine Rebuild Service
  • The Yamaha YFZ 450R is built to rev, pull hard, and take abuse. However, when the engine starts losing compression, shifting poorly, or feeling weak under throttle, it needs more than a quick patch. A full rebuild brings it back the right way.
  • At REV6, we tear your engine down completely, inspect every key component, and rebuild it with corrected clearances and refreshed internals. As a result, your YFZ 450R gets sharper response, smoother operation, and the strength it needs for aggressive riding.
  • Core Requirement
  • Core required: This is a build core engine service. You send in your Yamaha YFZ 450R engine, and we rebuild it here at REV6.
  • Before shipping, remove your exhaust, fuel-related components, electrical parts, and sensors. Once your engine is packed, we coordinate pickup and handle the rebuild process from teardown to return shipping.
  • For step-by-step shipping and prep instructions, visit our Help Center.
  • If you want to spread out the cost, check out our flexible payment options to keep your rebuild moving.
  • What’s Included in the Rebuild
  • Motor fully cleaned, blasted, and prepared for assembly
  • Cylinder head inspected and decked for a proper compression seal
  • Camshaft lobes and journals cleaned and polished
  • Cylinder inspected for wear and damage
  • Worn cylinders replaced with refurbished, hone-finished Nikasil-coated cylinders
  • New moly-coated piston, rings, wrist pin, and circlips installed
  • Crankshaft bearings cleaned and inspected
  • Crankshaft rebuilt as needed
  • Complete transmission gearbox and shift assembly inspected and rebuilt
  • Clutch assembly fully inspected
  • Bottom-end bearings cleaned and inspected
  • Oil pump assembly inspected and rebuilt
  • Engine cases inspected and machined as needed
  • Cases tested for journal wear, cracks, holes, or excessive wear
  • Quality control inspection completed before shipping
  • Note: Final build details may vary depending on your Yamaha YFZ 450R engine’s condition. Damaged components that require replacement may add cost.
  • Built for High-Rev ATV Performance
  • The YFZ 450R needs clean shifting, strong compression, and dependable oiling when you ride hard. Because of that, we focus on the top end, bottom end, transmission, clutch, oil pump, and case condition during the rebuild.
  • In turn, your rebuilt engine delivers stronger response, smoother shifting, and more confidence when you’re back in the throttle.
  • Warranty & Support
  • Every REV6 engine rebuild includes a 1-year warranty. In addition, you can upgrade to a 2-year no-fault warranty for $450.
  • Review coverage details in our warranty policy, browse common questions in our FAQ, or contact our team before ordering.
  • For first-start guidance, follow our engine break-in procedure. You can also visit the REV6 Blog or watch rebuild content on our YouTube channel.
  • Looking for Parts Instead?
  • If you don’t need a full engine rebuild, you can find top and bottom end kits, transmissions, cylinders, pistons, rings, crankshafts, gaskets, seals, valves, clutch parts, ECU tune options, and more in our Yamaha YFZ parts catalog.
  • Take Action
  • If your YFZ 450R is losing power, shifting rough, or showing signs of internal wear, now’s the time to rebuild it the right way.
  • Get back on the trail with sharp response, strong pull, and confidence in your rebuilt engine.
  • We proudly support veterans and active servicemembers with available discounts—thank you for your service.


FITMENTS

YearMakeModel
-YamahaYFZ 450R
Supplier:
REV6

This Shipping Policy explains how orders are processed, handled, and delivered by Powersport Junkies, including delivery timelines, shipping coverage, and special conditions for military addresses. It is designed to give customers a clear understanding of what to expect when placing an order.

Powersport Junkies is proud to be an authorized dealer of the brands we currently offer. When you purchase from us, you are guaranteed to receive genuine, brand-new products backed by the full manufacturer warranty. We work directly with the manufacturers to ensure you receive the highest quality service and support.

Order Processing and Handling

Orders are processed quickly to ensure fast delivery. Our standard handling time is 0–1 business days. Order cutoff time is 12 PM PST Monday-Friday and orders placed after that will be shipped shipped next business day. 

Transit Times

Once shipped, orders typically arrive within 2–3 business days. Transit times may vary slightly depending on the destination, weather conditions, or carrier-related delays. Delivery estimates apply only after the order has left our facility.

Delivery Schedule

Standard delivery occurs Monday through Friday. Saturday delivery may be available.

Shipping Coverage

Powersport Junkies offers free shipping to the lower 48 states of the United States. We do not ship to the following locations:

  • Alaska

  • Hawaii

  • Puerto Rico

  • Any international destination outside the United States

Orders placed with shipping addresses in restricted locations will be canceled and refunded.

Military Shipping (APO/FPO)

Powersport Junkies ships to APO/FPO military addresses using USPS only.

  • We cannot ship hazardous materials or oversized items to military addresses due to carrier and military mail restrictions.

  • Transit times to APO/FPO locations may vary significantly depending on military mail processing.

Address Accuracy and Delivery Issues

Customers are responsible for ensuring that all shipping information provided at checkout is accurate and complete. Powersport Junkies is not responsible for delays, lost packages, or delivery failures caused by incorrect or incomplete addresses. If a package is returned due to an address error, additional shipping charges may apply to resend the order.

Lost, Delayed, or Damaged Shipments

If a shipment is delayed, lost, or arrives damaged, customers should contact us promptly so we can assist with initiating a claim or resolving the issue with the carrier. While we support the process, final decisions regarding claims are made by the carrier.

Tracking Information

A tracking number is provided via email once the shipping label has been created. Tracking updates may take up to 24 hours to appear after the label is generated.

Shipping Restrictions

Certain items may be subject to shipping restrictions due to size, weight, or hazardous material regulations. If an order cannot be shipped due to such restrictions, we will notify the customer to arrange an alternative solution.

Our Info

  • Storefront name: Powersport Junkies

  • Address: 940 Calle Amanecer, Suite N
    San Clemente, CA 92673

  • Phone: 877-999-9120

  • Support email: support@powersportjunkies.com

  • Support hours + timezone: 

        Monday-Friday: 9:00 AM-5:00 PM PST

        Saturday: 9:00 AM-3:00 PM PST

        Sunday: Closed

Powersport Junkies offers no‑hassle returns and exchanges within  60 days of delivery. We want every customer to feel confident when shopping with us, and our return process is designed to be simple, fair, and fast.

Return Eligibility

To qualify for a return or exchange, the following conditions must be met:

  • The item must be in new, unused, and uninstalled condition.

  • All original packaging, tags, hardware, and accessories must be included and intact.

  • Items showing wear, installation marks, damage, or improper use cannot be accepted.

  • An order number is required.

Once your return is received at our warehouse, a refund will be issued within 5 days after inspection.

Refunds

Refunds are issued to the original form of payment once the returned item has been received and approved. If we are unable to refund to the original payment method, the refund will be issued as store credit.

Depending on your bank or credit card provider, it may take an additional 2–3 business days for the refund to appear in your account. 

Exchanges

To make an exchange, simply complete the return process and then place a new order for the item you want instead. This ensures the replacement item is reserved and ships quickly.

How to Start a Return

To request a Return Authorization (RA#), contact us at support@powersportjunkies.com. Please include your order number and the item you wish to return.

Once approved:

  1. You will receive a Return Authorization email with instructions.

  2. Print the prepaid label provided by us. A $9.99 return fee will be deducted from your refund, and for oversize items additional fees may apply to help cover the increased cost of the shipping label. Oversize items include seat, racks, windshields, bumpers, doors, etc. We will provide an estimate on the cost of the label upon your approved return.

  3. Ship the item back within 7 days of the RA being issued as RA #'s are only valid for 7 days. 

Please do not tape anything to the original product packaging. Place the item inside a proper shipping box. Using the manufacturer’s box as the shipping container will result in damage and the return may be rejected.

Be sure to keep your return tracking number. Powersport Junkies is not responsible for lost return shipments. You will receive a confirmation email once your return has been processed and refunded.

Defective, Incorrect, or Damaged Items

If you receive a defective, damaged, or incorrectly shipped item, contact us immediately. We will cover the return shipping cost and ensure the issue is resolved quickly.

Dynojet Tuners

All dynojet tuners must be factory sealed to qualify for a return to ensure it has not been installed.

Non‑Returnable Items

Certain items cannot be returned, including:

  • Electronics with opened packaging or broken manufacturer seals

  • Any part that has been installed or shows installation attempts

  • Tools or chemicals that have been opened or unsealed

  • Open‑box items with destroyed or missing packaging

  • All Tires cannot be returned. 

Tires

Tires are non‑returnable once purchased. Because rubber compounds, storage conditions, and mounting attempts can’t be verified after delivery, all tire sales are considered final. This applies whether the tire has been mounted, unmounted, handled, or simply removed from its packaging. To ensure you get the correct fitment every time, our team is always available to help you confirm the right size and model before you order.

Open Box Items

Open Box items are sold as‑is and are not eligible for return, refund, or exchange. All Open Box purchases are final. These items may include minor cosmetic imperfections or missing non‑essential accessories, and pricing reflects this condition. By completing an Open Box purchase, the customer acknowledges and accepts these terms.

Order & Shipping Insurance

Every shipment includes insurance coverage if directly selected under the shipping address selection. If your order is lost or damaged in transit, insurance will cover a replacement at no cost to you. We handle the claim process directly so you don’t have to.

If a replacement is available, it will be shipped out as soon as possible. If you prefer a refund instead of a replacement, refunds are issued only after the insurance claim is fully settled.

Our Info

  • Storefront name: Powersport Junkies

  • Address: 940 Calle Amanecer, Suite N
    San Clemente, CA 92673

  • Phone: 877-999-9120

  • Support email: support@powersportjunkies.com

  • Support hours + timezone: 

        Monday-Friday: 9:00 AM-5:00 PM PST

        Saturday: 9:00 AM-3:00 PM PST

        Sunday: Closed

Protecting your privacy and maintaining the security of your information is a core priority at Powersport Junkies. This policy explains how we collect, use, store, and protect your information when you interact with our website. It also outlines the choices you can make regarding your personal data. We encourage you to review this information carefully and reach out with any questions at support@powersportjunkies.com.

Information Essential to Operating Our Store

When you browse our website, we automatically collect certain technical details about your device and your visit. This includes your IP address, timestamps, pages viewed, login status, and similar data. This information allows us to:

  • Recognize your login so you don’t need to authenticate repeatedly.

  • Ensure our website performs efficiently and securely.

  • Allow smooth navigation between pages and products.

  • Remember items placed in your cart before checkout.

  • Maintain secure processing of your data.

This “essential information” is collected through cookies, which are small text files stored in your browser. These first‑party cookies are necessary for the website to function properly and provide a seamless shopping experience.

Information Collected When You Place an Order

When you make a purchase, we require personal information to process and deliver your order. This includes your name, email address, billing address, and shipping address. We use this information to:

  • Process your payment and complete your order.

  • Ship your items to the correct location.

  • Communicate updates related to your order.

We may request additional verification if needed and reserve the right to decline any order for reasons we determine to be valid.

Customer Accounts

You may choose to create an account for faster checkout and easier order management. You may withdraw your consent and request account deletion at any time by contacting us at the email listed down below.

Partial Purchases and Abandoned Carts

If you begin the checkout process but do not complete your purchase, you may provide partial information such as your email address. We may send a reminder email about your unfinished order. You may opt out of these reminders at any time.

Product Reviews

After completing a purchase, we may send you an email inviting you to review the product you bought. Your feedback helps other customers make informed decisions. You may also receive a survey request from Google regarding your shopping experience.

Personalization and Analytics

We collect certain visit‑related information—such as pages viewed, timestamps, and referral sources—to personalize your experience and provide relevant communications. This data is collected through cookies and tracking beacons, which you may choose to block.

Email Communications

By entering your email on our website, you consent to receiving promotional emails, including discounts, product recommendations, and helpful information related to your purchases. These emails are sent through a third‑party platform that may collect data such as your IP address, browser type, operating system, and interaction with the email. You may unsubscribe at any time using the link provided in every email.

Advertising and Remarketing

We participate in remarketing campaigns that display Powersport Junkies advertisements to visitors who have previously visited our website. Third‑party vendors use cookies to show relevant ads based on past browsing activity. These ads do not collect sensitive personal information such as email addresses, phone numbers, or payment details. All remarketing activities comply with the policies of our advertising partners.

How Your Information Is Processed

Our store is hosted through BigCommerce, a U.S.‑based platform that participates in the EU‑US Privacy Shield Framework and adheres to strict data protection standards. Payment processing is handled by accredited providers. These partners help ensure secure handling of your payment information and compliance with PCI‑DSS requirements.

Your Rights and Control Over Your Data

If you are located in the U.S. and we sell products in your region, you may have rights regarding your personal data, including the ability to access, correct, delete, or object to its processing. If you cannot manage your data through your account or do not have an account, you may contact us directly for assistance.

Data Retention

We retain your information for as long as your account remains active. Certain data may be retained longer to comply with legal obligations, including fraud prevention and tax requirements.

Legal Requirements

We may be required to disclose personal information when requested by law enforcement, courts, or government authorities. This may occur without prior notice to you. We fully cooperate with lawful investigations and reserve the right to report any suspected illegal activity.

Contacting Powersport Junkies

For questions about this Privacy Policy or how your information is handled, contact us at:

Our Info

  • Storefront name: Powersport Junkies

  • Address: 940 Calle Amanecer, Suite N
    San Clemente, CA 92673

  • Phone: 877-999-9120

  • Support email: support@powersportjunkies.com

  • Support hours + timezone: 

        Monday-Friday: 9:00 AM-5:00 PM PST

        Saturday: 9:00 AM-3:00 PM PST

        Sunday: Closed

For warranty issues please contact us at support@powersportjunkies.com. Each Brand is different and we can provide instruction to complete warranty issues.

Powersport Junkies is proud to be an authorized dealer of the brands we currently offer. When you purchase from us, you are guaranteed to receive genuine, brand-new products backed by the full manufacturer warranty. We work directly with the manufacturers to ensure you receive the highest quality service and support.

Our Info

  • Storefront name: Powersport Junkies

  • Address: 940 Calle Amanecer, Suite N
    San Clemente, CA 92673

  • Phone: 877-999-9120

  • Support email: support@powersportjunkies.com

  • Support hours + timezone: 

        Monday-Friday: 9:00 AM-5:00 PM PST

        Saturday: 9:00 AM-3:00 PM PST

        Sunday: Closed

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