YAMAHA 5LP-17151-00-00 Gear Pinion 5TH 21T

( Manufacturer Part Number: 5LP-17151-00-00 ), ( Type: Transmission Gear )

Review YAMAHA Oem 5th Gear Pinion 21t fits RAPTOR 660R 2003

The **Yamaha 5LP-17151-00-00 21-tooth 5th Gear Pinion** is a precision-engineered, high-performance transmission component designed exclusively for the **2003 Yamaha Raptor 660R**, a rugged and versatile adventure motorcycle renowned for its off-road prowess and on-road adaptability. This pinion gear serves as a critical link in the motorcycle s final drive system, directly influencing the bike s shifting dynamics, gear engagement, and overall drivetrain efficiency. Crafted from durable, heat-treated steel, the **21-tooth pinion** is machined to exacting tolerances to ensure seamless meshing with the corresponding sprocket, minimizing wear and preventing premature failure even under the demanding conditions of heavy-duty riding, aggressive off-roading, or prolonged use in extreme environments. Its robust construction and optimized tooth geometry are engineered to withstand the high stresses of torque transfer, providing reliable performance whether tackling rocky trails, muddy terrain, or high-speed highway cruising. The pinion s precise fitment into the Raptor 660R s transmission housing ensures smooth, crisp shifting, reducing the risk of chain slippage or erratic engagement that can plague lower-quality aftermarket parts. For riders who demand durability, precision, and long-term reliability in their drivetrain, this Yamaha OEM replacement pinion is an indispensable upgrade, maintaining the factory-intended performance characteristics of the 660R while extending the lifespan of the entire final drive assembly. Whether used as a direct replacement for a worn or damaged original part or as part of a comprehensive drivetrain refresh, this component exemplifies Yamaha s commitment to engineering components that balance strength, efficiency, and longevity.

### **Pros and Cons of Buying a 2003 Yamaha Raptor 660R with a 5th Gear Pinion (21T) Part Number: 5LP-17151-00-00**

1. **Reliability and Durability** The Yamaha Raptor 660R is widely regarded as one of the most durable and long-lasting ATVs ever made. Many units still run strong after 20 years with proper maintenance.

2. **Proven Performance** The 660cc engine is robust, capable of handling rough terrain, towing, and heavy-duty use. It s known for its torque and low-end power, making it ideal for off-roading and work applications.

3. **Availability of Parts** Being a classic model, Yamaha parts (including the 5th gear pinion) are still widely available, though some may require searching for aftermarket or used options.

4. **Modification Potential** The Raptor 660R has a strong aftermarket support system, allowing for upgrades to suspension, exhaust, and other components to improve performance.

5. **Resale Value** While not as high as newer models, a well-maintained 2003 Raptor 660R still holds decent resale value, especially if it s in good condition.

6. **Simplicity of Design** The mechanical simplicity of the Raptor makes it easier to diagnose and repair compared to more complex modern ATVs.

7. **Off-Road Capability** The high ground clearance, sturdy frame, and strong engine make it well-suited for rough terrain, mud, and rocky trails.

8. **Cost-Effective Operation** Fuel efficiency is decent for its class, and maintenance costs are relatively low compared to modern high-performance ATVs.

---

1. **Age and Wear** A 2003 model is approaching 20 years old, meaning parts like the 5th gear pinion, bearings, and seals may be worn out and require replacement soon.

2. **Potential for Hidden Issues** Older ATVs often have unseen problems such as worn-out drivetrains, rusted frames, or failing electrical components. A thorough inspection is crucial.

3. **Emissions and Modern Regulations** Some areas may have restrictions on older, less efficient vehicles, though the Raptor 660R is not typically affected by strict emissions laws.

4. **Limited Technology** Compared to modern ATVs, the Raptor lacks advanced features like traction control, electronic fuel injection tuning, or modern suspension systems.

5. **Weight and Handling** The Raptor is heavier than some modern ATVs, which can make it less nimble in tight or technical terrain.

6. **Rust and Corrosion** If the ATV has been stored improperly or exposed to harsh conditions, rust can be a significant issue, especially in critical areas like the frame and drivetrain.

7. **Discontinued Support** While parts are still available, Yamaha no longer produces new Raptor 660Rs, meaning long-term support and warranty coverage are nonexistent.

8. **Fuel and Maintenance Costs** Older engines may require more frequent oil changes, filter replacements, and other upkeep compared to newer models with better maintenance intervals.

---

The **2003 Yamaha Raptor 660R with a 5th gear pinion (21T)** is an excellent choice if you prioritize **durability, off-road capability, and cost-effectiveness** over modern conveniences. It remains a reliable workhorse for those who need a tough, low-maintenance ATV for heavy-duty use, farming, or recreational off-roading.

However, **buying an older model means accepting potential wear and tear**, especially in critical components like the drivetrain. A **pre-purchase inspection is essential** to check for rust, drivetrain issues, and overall structural integrity. If you re willing to invest in maintenance and upgrades, this ATV can provide **years of dependable service**.

For **casual riders or those seeking modern features**, a newer ATV might be preferable. But for **serious off-roaders, farmers, or those who value longevity**, the Raptor 660R remains a strong, time-tested option.

---

- **Buy if:** You need a **durable, high-torque ATV** for work or heavy off-roading, are prepared for maintenance, and can find a **well-documented, inspected unit**.

- **Avoid if:** You want **modern technology, low maintenance, or plan to keep the ATV long-term without repairs**.

- **Inspect thoroughly** (check drivetrain, frame, engine, and electrical systems).

- **Budget for potential replacements** (pinion, bearings, seals, etc.).

- **Consider a used but well-maintained example** over a neglected one.

- **Test ride in different conditions** to ensure it handles as expected.

Ultimately, the Raptor 660R is a **great buy for the right buyer** one who values **proven reliability over modern frills**. If you re confident in its condition and willing to maintain it, it will serve you well for many years.

Details:

All parts are carefully packaged. See photos for exact condition.

part #: 5lp171510000 prices

• $14.97-$46.98

specifications cyclevintagee:

• for models: 660r, Raptor
• for makes: Yamaha
• for years: 2003
• mpn: 5lp-17151-00-00
• type: Transmission Gear

offer cyclevintagee:

• quantity: 1
• availability: In Stock
• sold: 0
• started: March 24, 2026
• options: Ship-to-home

returns cyclevintagee:

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

shipping cyclevintagee:

• transit: 3-9 Days
• type: Fixed
• cost: $0.00
• class: Standard
• service: Standard

seller cyclevintagee:

• # reviews: 1711
• rating: 99.9%
• city: Granton, Wisconsin

general cyclevintagee:

• Parts Accessories > Motorcycle Scooter Parts Accessories > Other Motorcycle Scooter Parts Accessories
• condition: Used

payments cyclevintagee:

• credit card: Diners-club
• wallet: Google-pay
• other

Yamaha 5LP-17151-00-00 Is Similar To:

• 0000 Yamaha Yg1 Yf1 Yj1 Yj2 Nos Oem Turn Signal Lens White X 2 (32% similar) Brand new old stock turn signal lenses white set of 2 bx TT12...(May 23rd, 2016)
• 109-14451-00 Yamaha Nos Air Filter Oem New Riverside (34.8% similar) It is in excellent new condition. Here is a nos air filter for your yamaha YJ2...(May 27th, 2018)
• 109-25437-10-00 Yamaha Nos Genuine Rear Sprocket Tooth Oem (26.4% similar) The actual item is shown. Oem part number. This is in nos unused condition. This may or not come in the original packaging. The majority of items we sale are shipped through USA postal service USPS and or FedEx with delivery confirmation. Up for sale is this genuine yamaha 37T rear sprocket part as ...(January 7th, 2019)
• 11613-67-73 Yamaha Oem Gt1-gtmx 1973-74 (25.5% similar) Hard to find item. Outer cover is very lightly soiled as shown in picture...(August 15th, 2017)
• 122-25437-10-33 122-25437-11-33 Yamaha Rear Sprocket Oem (23.1% similar) They cannot be combined after have been paid for. It cannot be tracked outside of the states and insured. Parts come in every day. The shipping price is based on weight and measurements of box. New old stock oem part. If your application is not listed as fitting, do purchase it. Do your homework and...(August 12th, 2018)
• 124-26335-10-00 Yamaha Clutch Cable New Oem 766856459729 (28.6% similar) New oem yamaha cable clutch oem part number: qty 1 previous: 00ITEM only fits specific model's listed. The picture could be generic. New oem yamaha cable clutch oem part number: qty 1 previous: 00ITEM only fits specific model's listed...(October 1st, 2018)
• 132-16181-00 Yamaha Oem Clutch Spacer (32% similar) ...(April 25th, 2019)
• 136-11636-00 Yamaha Oem Piston (32.3% similar) ...(January 24th, 2019)
• 137-23441-00 Yamaha Nos Genuine Oem Upper Handlebar Clamp Cap New (29.7% similar) Shipping: I only ship within the USA unless otherwise noted. This is in new unused condition. This shows wear from being stored, handled and or displayed. May fit other years and or model's but I am unsure which specifically. This is a oem part number: up for sale nos genuine yamaha upper handlebar ...(July 15th, 2018)
• 148-18111-00 Genuine Yamaha Nos Gear Shift Pedal Chrome Nla Obsolete Part (23.5% similar) Do your homework, we did. This is for new parts. Be sure to check all of our offers. Buying on 1 shift pedal or lever as shown. This yamaha pedal,shift not available fits the following model's and components: motorcycle 1962 YD3 shiftier 2/1 964 1963 YDT1 be sure to look at photos check cross ...(March 22nd, 2018)
• 150-11601-10-00 Yamaha New Oem Piston (32% similar) Please research the part number to make sure this is correct for your model and year before buying or purchasing. This part may also fit other model's than what I have listed in the title. Not all years use the same part number...(November 5th, 2017)