MONTESA 2120.370 Cota Chain Tensioner Bracket Nos 247 P/n 21M

( Brand: Montesa ), ( Manufacturer Part Number: 2120.370 ), ( Part Type: Bracket Chain ), ( Country Of Origin: Spain )

Review MONTESA 247 Cota Chain Tensioner Bracket P/n Nos 21m fits 1968–1980

The **Montesa 2120.370 247 Cota Chain Tensioner Bracket** (Part Number: **21M**) is a precision-engineered component designed specifically for the iconic **Montesa Cota 247** dirt bike, serving as a critical link in the bike s drivetrain system for models produced between **1968 and 1980**. This bracket plays a vital role in maintaining optimal chain tension, ensuring smooth power delivery, reducing wear on the chain and sprockets, and preventing premature failure of the drivetrain all of which are essential for both performance and longevity. Crafted from high-quality **steel**, the bracket is built to withstand the rigorous demands of off-road riding, including high-speed cornering, aggressive acceleration, and the constant stress of suspension movement. Its robust construction features a **reinforced mounting point** that securely fastens to the bike s frame, allowing for precise adjustment of chain tension while minimizing flex or vibration. The design incorporates a **smooth, contoured surface** to prevent chain binding and ensure consistent engagement with the tensioner mechanism, which is particularly important for riders who push their bikes to their limits on technical terrain. Whether used for restoration, maintenance, or replacement in a classic Cota 247, this bracket is a direct-fit solution that restores factory reliability, helping enthusiasts preserve the original performance characteristics of this legendary Spanish enduro bike. Its compatibility with the bike s drivetrain ensures that riders can enjoy the same responsive handling and durability that made the Cota 247 a favorite among off-road competitors and adventure seekers during its era.

### Pros and Cons of buying a Montesa 2120.370 247 Cota Chain Tensioner Bracket (P/N NOS 21M, 1968 1980)

1. **Original Equipment (OEM) Quality** As a new-old-stock (NOS) part, it is likely in excellent condition, matching the original specifications of your Montesa 247. This ensures proper fit, durability, and performance without compromises found in aftermarket knockoffs.

2. **Reliability and Longevity** The Cota chain tensioner bracket is a critical component for maintaining proper chain tension, reducing wear on the chain and sprockets. A high-quality NOS part minimizes the risk of premature failure, which can lead to chain stretch or derailment.

3. **Authentic Fitment** Since this part is designed specifically for the 1968 1980 Montesa 247, it will align perfectly with the stock mounting points and chain tensioning system. Aftermarket parts may require modifications or adjustments, whereas this part should install without issues.

4. **Preservation of Originality** If you value maintaining or restoring your bike to its original condition, using a NOS part keeps the build authentic. This is particularly important for collectors or enthusiasts who prioritize historical accuracy.

5. **Reduced Risk of Counterfeit Parts** NOS parts are less likely to be fakes compared to aftermarket or eBay listings, which can sometimes sell substandard replicas. This ensures you re getting a genuine Montesa component.

6. **Compatibility with Stock Components** The tensioner bracket works seamlessly with the original chain, sprockets, and swingarm setup, avoiding potential compatibility issues that might arise with non-OEM replacements.

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1. **Limited Availability and Higher Cost** NOS parts are often more expensive than aftermarket alternatives due to their scarcity and condition. Finding a reputable seller may require searching through specialty motorcycle parts dealers or auctions, which can be time-consuming.

2. **Potential for Overpaying** Since NOS parts are in demand, some sellers may inflate prices, especially if the part is rare or highly sought after. Buyers must research fair market value to avoid paying more than necessary.

3. **No Warranty (or Limited Warranty)** NOS parts are typically sold "as-is," meaning there may be no warranty or return policy. If the part is defective or damaged upon arrival, you may be out of luck unless the seller offers a refund or replacement.

4. **Condition Uncertainty** Even though it s NOS, there s no guarantee the part hasn t been previously installed or exposed to wear. While it should be in good condition, some sellers may not disclose minor imperfections (e.g., light scratches or minor corrosion).

5. **Shipping Risks** NOS parts, especially older motorcycle components, can be fragile or heavy, increasing the risk of damage during transit. Buyers must account for potential shipping costs and insurance to protect the part.

6. **No Upgrades or Modern Improvements** Unlike aftermarket parts, a NOS tensioner bracket won t include modern enhancements like reinforced materials, improved lubrication systems, or lighter-weight designs that some aftermarket alternatives offer.

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Buying the **Montesa 2120.370 247 Cota chain tensioner bracket (P/N NOS 21M, 1968 1980)** is a strong choice if you prioritize **authenticity, reliability, and a perfect fit** for your bike. The part is ideal for **restoration projects, collectors, or riders who want to maintain stock specifications**. However, the **higher cost, limited availability, and lack of warranty** make it less practical for casual riders or those on a tight budget.

If you re restoring a classic Montesa 247 and want to preserve its original character, the NOS part is worth the investment. For everyday use or if you re open to aftermarket options, a high-quality replica or upgraded tensioner bracket might offer better value without sacrificing performance.

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- You re restoring or maintaining a vintage Montesa 247 and want to stay true to the original build.

- You ve verified the seller s reputation and the part s condition (e.g., through photos or a physical inspection if possible).

- You re willing to pay a premium for authenticity and reliability.

- You re on a budget and can find a reputable aftermarket tensioner bracket that fits well and offers similar performance.

- You re not concerned with originality and want modern materials or warranties.

- You re unable to locate a NOS part at a reasonable price.

**Final Tip:** Always cross-reference the part number with multiple sellers, check for return policies, and inspect the part thoroughly (or request detailed photos) before purchasing to ensure you re getting a genuine NOS component.

Details:

Double checked n our manuals. Bid is for one as seen in photo. Part is a 10 out of 10, being new and 1 the worst condition. Montesa 247 Cota Chain Tensioner Bracket p/n 2120.370 NOS 21M 1968-1980 Fits model's.

Location: U 302 Box 112/164 DFP 204 box 108/289 swam.

part #: 2120370 price

• $18.00

specifications fendeframat:

• for years: 1968-1980
• brand: Montesa
• mpn: 2120.370
• part type: Bracket Chain
• country of origin: Spain

returns fendeframat:

• paid by: Seller
• policy: Returns Accepted
• time: 30 Days

offer fendeframat:

• options: Ship-to-home
• availability: In Stock
• started: May 7, 2026
• best offers: True
• quantity: 1
• sold: 0

payments fendeframat:

• money order
• other
• wallet: Paypal
• credit card: Visa

general fendeframat:

• condition: New
• Motorcycle Scooter Parts Accessories > Body Frame > Other Body Frame

shipping fendeframat:

• carrier: USPS
• transit: 4-7 Days
• service: USPS Ground Advantage
• class: Standard
• cost: $6.23
• type: Calculated

seller fendeframat:

• # reviews: 27904
• rating: 100.0%
• city: Canby, Oregon

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