SAVE
$3.98
Representative image of an RCScrewZ metal-shielded bearing kit for Kyosho Caliber 90 / Caliber 90 V6 Nitro Heli (21990); exact bearing sizes and quantities vary by RC model.
Upgrade Your RC Car with Metal Shielded Bearings for Kyosho Caliber 90 V6 | kyo072b - High Performance Upgrade | Durable & Reliable - by J-M SUPPLIES
Infographic: 'Choose Wisely for Your Need for Speed' – Highlights Metal Shielded Bearings as the top choice for unbeatable on-road RC car performance -
Infographic: 'Choose Wisely for Off-Road Adventuring' – Recommends Rubber Sealed Bearings for maximum protection and enhanced off-road performance in RC vehicles -
Infographic: 'Choose Wisely for Your Need for Speed' – Highlights Metal Shielded Bearings as the top choice for unbeatable on-road RC car performance - kyo072b
Infographic: 'Choose Wisely for Off-Road Adventuring' – Recommends Rubber Sealed Bearings for maximum protection and enhanced off-road performance in RC vehicles - kyo072b
Infographic: 'What Matters Most to You? Performance on the Streets or Durability in the Dirt?' – Guides on selecting bearings to match your RC lifestyle, highlighting the importance of choosing based on whether your focus is speed on paved roads or resilience in off-road conditions - kyo072b
Infographic: 'Need Bearings? How to Check Your RC's Bearings for Replacement' – Instructions to remove, clean, and inspect bearings for gritty texture or improper movement, indicating the need for replacement - kyo072b
Step-by-Step Guide: Checking RC Bearings. 2. Assess if bearings feel gritty or aren't spinning freely. 3. Non-free spinning bearings impair RC performance. 4. Bearings not spinning freely may need replacement - kyo072b
RCScrewZ and J-M SUPPLIES offer high-quality RC bearing kits, available as metal shielded or rubber sealed options, suitable for diverse RC needs - kyo072b
Elevate Your RC Adventure! Image introducing Stainless Screw Kits as the Ultimate Upgrade. Offers enhanced durability, superior corrosion resistance, and a sleek look, making them a top choice for complementing high-quality bearing selections. Trusted by RC enthusiasts worldwide - kyo072b
Infographic on RCScrewZ Bearing Kits: Highlights features of both metal and rubber shielded bearing kits, detailing high-quality components suitable for various RC models. Covers standard, flanged, one-way, and thrust bearings included in kits, with extra spares. Explains the shielding and performance benefits of each type, tailored for specific RC model needs - kyo072b
Infographic reminder: Refer to the item description for more detailed information about the product - kyo072b
Infographic reminder: Refer to the item description for more detailed information about the product - kyo072b
Notice: Check the product description for detailed information on the specific bearing sizes included in this bearing kit - kyo072b

Why Choose This Kit

Key features and intended use for this kit.

Shield type

Metal-Shielded (On-Road)

Performance focus

Low-drag, not sealed

Best suited for

Clean operating conditions

Metal-Shielded Bearings24+ Pieces

RCScrewZ Metal Shielded Bearing Kit kyo072b for Kyosho Caliber 90 / Caliber 90 V6 Nitro RC Helicopter (21990) | SET

RCScrewZSKU: kyo072b

Model-specific metal-shielded bearings for smooth, low-drag rotation in this RC helicopter, intended for clean operating conditions.

Fits: Kyosho Caliber 90 / Caliber 90 V6 Nitro Heli (21990)
OEM / model: 21990

US
Regular price
$85.97
Sale price
$85.97
Regular price
$89.95

In stock

View Cart

Confirm this kit fits your RCMatch the RC model and OEM/model number shown above to your vehicle.

Exact model check

Confirm This Fits Your RC

Match the RC model and OEM/model number below before ordering.

RC model
Kyosho Caliber 90 / Caliber 90 V6 Nitro Heli (21990)
OEM / model number
21990
Kit type
Metal-Shielded Bearing Kit — Low-Drag for Cleaner Running
Piece count
24+ Pieces
Scale
1:8
Power
Nitro & Glow Fuel
View all verified kits for this model →
More compatibility details
RC brand
Kyosho
Vehicle class
Helicopter
Kit SKU
kyo072b
Model series
Caliber, Caliber 90, Caliber 90 V6
Product information

Everything You Need Before Ordering

Review what is included, installation notes, shipping details, and complete kit information.

Kit Contents & Installation

What’s Included Model-specific bearing set with one spare of each included size.
  • All bearing sizes assigned to this model-specific kit
  • One spare of each included size
  • Bearing styles vary by RC model and may include standard, flanged, one-way, or thrust bearings
Installation & Model NotesImportant instructions and model-specific guidance.

Seat bearings fully and squarely. Do not force them into the housing or overtighten the hardware that retains them.

Keep metal-shielded bearings clean and dry.

After cleaning and drying, apply a small amount of light bearing oil.

Details & Support

Kit Details Lower-drag metal shields for clean, dry running conditions.
Shield Type
Metal-Shielded Bearings
Performance Priority
Lower drag
Protection
Not sealed; best kept clean and dry
Best For
Cleaner on-road or prepared surfaces when lower drag is the priority
Not Ideal For
Dust, dirt, sand, mud, water, or frequent wet-condition use
Shipping & Returns Handling time, current delivery estimate, and return policy.
Free shipping on all U.S. orders (USPS Priority Mail).
Ships within 1–2 business days (Mon–Fri); some Saturday shipments by 12:00 PM ET.
Most orders ship from Canton, MI 48187. APO/FPO/DPO & PO Boxes welcome.
Priority Mail typically delivers in 2–3 business days (estimates; not guaranteed).
Easy 30-day returns with prepaid USPS label; refunds issued within 3 business days after the return is received.

Over 99% positive over ~14,000 orders on eBay (last 12 months) — as of October 2025. View on eBay

Full Product Description Read the complete product specifications and details.

Exact RC Model Fitment

Confirm the exact RC model and RC vehicle OEM/model number below before ordering.

Compatible RC Model
Kyosho Caliber 90 / Caliber 90 V6 Nitro Heli (21990)
Compatible RC Brand
Kyosho
RC Vehicle OEM / Model Number(s)
21990
RCScrewZ Kit Part Number
kyo072b

Vehicle Compatibility Details

Review these vehicle details to help confirm compatibility with your RC model.

RC Vehicle OEM / Model Number(s)
21990
RC Chassis Compatibility
Kyosho Caliber 90 / V6 helicopter (21990)
Compatible Vehicle Type
Class 90 Nitro RC Helicopter
Terrain Compatibility
Compatible Scale
1:8
Compatible Fuel Type
Nitro & Glow Fuel

What Is Included

Included bearing sizes for this Metal-Shielded Bearing Kit:

    Note: The specific bearing sizes will be listed soon. In the meantime, please contact us for detailed information about the sizes included in this kit. We're happy to assist you!

What Is Not Included

Only the bearings identified in the included-bearing-size list are part of this kit. 

The RC vehicle and separately sold parts are not included unless specifically listed.

Installation & Model Notes

Metal Shielded Bearing Kit Compatibility:

Quick Fit Summary:

  • Compatible Brand: Kyosho

  • Fit: Model-specific fitment for Kyosho Caliber 90 / Caliber 90 V6 Nitro RC Helicopter, OEM/model code 21990.

  • Compatible RC Model/OEM Numbers: 21990

  • Scale: Not currently verified

  • Power Source / Fuel Type: Nitro & Glow Fuel

  • Battery / Cell Count: Not applicable - nitro powered.

  • Drive Type: Rotor-driven helicopter

  • Vehicle Type: Class 90 Nitro RC Helicopter

  • Chassis: Kyosho Caliber 90 / V6 helicopter (21990)

  • Era: Not currently verified

  • OEM / Models: 21990

  • RC Model Terrain: Aerial Use

This Kit Details:

  • SKU: kyo072b

  • MPN: kyo072b

  • Kit Type: Metal Shielded Bearing Kit

  • Bearing Kit Piece Count: 24+ Pieces

  • Bearing Type: Metal-Shielded Bearings (On-Road / Low-Drag)

  • Sealed Bearings: No

  • Water/Dust Protection: Low-drag, not sealed

  • Product Material: Carbon Chrome Steel Bearings

  • Product Color: Silver

Bearing Size Details: Not currently verified.

OEM / Model Code / Alias Coverage:

  • 21990

Model Family Coverage: Caliber, Caliber 90, Caliber 90 V6

Product Benefits:

  • Metal shielded bearings are tuned for low drag and smooth drivetrain feel in cleaner running conditions.
  • Best for clean-surface use, race-prep, display builds, or buyers who prefer reduced rolling resistance.

Fitment Note: Confirm your Kyosho OEM/model number before ordering. Bearing sizes are included only where source-backed; otherwise they remain marked as not currently verified.

Search-Friendly Notes: Compatible Kyosho Caliber 90 / Caliber 90 V6 parts for RC maintenance, rebuilds, restoration, and model-specific fitment lookup.

Metal-Shielded Bearing Kit Details

Review the bearing-kit details below before ordering.

RCScrewZ Kit Part Number
kyo072b
Product Brand
RCScrewZ
Shielding Type
Metal-Shielded (On-Road)
Sealed Bearing Status
No
Bearing Material
Carbon Chrome Bearings
Approximate Piece Count
24+ Pieces
Color
Silver

Before Ordering

  • Confirm your exact RC model, RC brand, and OEM/model number whenever possible.
  • Review the included-bearing-size list before purchase.
  • Read the installation and model notes before disassembly or installation.

Vehicle versions, chassis revisions, and model-year configurations can differ. 

Confirm fitment before purchase when your RC vehicle differs from the details shown above.

Share This Kit

Know another RC owner who could use this kit? Send them this exact product page.

More ways to share:

Customer Reviews

Same-model kit options

More Verified Kits for This RC Model

These kits are verified for the same exact RC model and OEM/model number.

Stainless Screw Kit

For Kyosho Caliber 90 / Caliber 90 V6 Nitro Heli (21990) OEM/model: 21990
Current price: $38.94 Compare-at price: $43.95 Save $5.01 In stock View Stainless Screw Kit
Next step

Continue Shopping by RC Model

Shop More Parts for This RC Model View all verified kits for this exact model Find Parts for a Different RC Model Search by brand and model in the Compatibility Hub
Fits: Kyosho Caliber 90 / Caliber 90 V6 Nitro Heli (21990)
$85.97