BMW 11158529306 Breather

( Manufacturer Part Number: 11158529306 ), ( Part Type: Breather ), ( Performance Part: No ), ( Country Of Origin: Germany )

Review BMW To Breather Part fits R1200RT R1250RT 2014–2025

The **BMW R 1200 RT (2014 2018) and R 1250 RT (2018 2025) with the 11158529306 R1200RT 2014 2018 R1250RT 18 25 breather** represent the pinnacle of BMW s refined adventure touring motorcycle engineering, blending cutting-edge technology with timeless German craftsmanship. These models are the epitome of a versatile, long-distance capable bike designed for both urban commuting and extended road trips, offering an unparalleled balance of comfort, performance, and practicality. The **R 1200 RT** (2014 2018) and its successor, the **R 1250 RT** (2018 onward), share a common foundation rooted in BMW s legendary **R 1200 GS** platform, but with a distinct focus on touring efficiency, ergonomics, and advanced rider aids. The **11158529306 breather** a critical component of the engine s air intake system plays a vital role in maintaining optimal airflow and performance, ensuring the twin-cylinder, liquid-cooled, 1,170cc (R 1200 RT) or 1,254cc (R 1250 RT) engine operates at peak efficiency while minimizing heat buildup and maximizing power delivery.

At the heart of these machines lies BMW s **boxer-twin engine**, a design celebrated for its smoothness, reliability, and torque-rich character. The **R 1200 RT** produces **136 horsepower and 104 lb-ft of torque**, while the **R 1250 RT** delivers a more robust **136 horsepower (R 1250 RT) and 109 lb-ft of torque**, with the latter featuring a slightly revised cylinder head and improved fuel injection for enhanced efficiency and responsiveness. Both models are paired with BMW s **Steptronic transmission**, a semi-automatic system that offers three riding modes **Sport, Comfort, and Rain** along with a manual override for purists, ensuring seamless gear shifts and adaptive throttle control. The **R 1250 RT** further refines this with a slightly more aggressive power delivery and a revised suspension setup, catering to riders who demand a touch more performance without sacrificing the bike s touring versatility.

The **R 1200 RT and R 1250 RT** are engineered for all-day comfort, featuring BMW s **Ergo Plus seating position**, which promotes a relaxed, upright posture to reduce fatigue on long rides. The **adjustable windscreen** (available in multiple sizes) and **wind tunnel-optimized fairings** minimize wind noise and buffeting, while the **integrated top case** (standard on the R 1250 RT) and **optional underseat bag** provide ample storage for essentials like a helmet, jacket, or even a change of clothes. The **R 1250 RT** introduces a more aerodynamic design with a slightly longer wheelbase and revised fairings, enhancing stability at highway speeds while maintaining nimble handling for city riding. Both models come equipped with **BMW Motorrad s advanced rider aids**, including **Cornering ABS, Dynamic Traction Control, and a fully integrated instrument cluster** with a **10.25-inch TFT display** (R 1250 RT) that offers real-time data on speed, fuel range, navigation, and even live traffic updates via Bluetooth connectivity.

Suspension and braking are where these BMWs truly shine, combining **adaptive damping** with **high-performance components** to ensure confidence-inspiring control in any condition. The **fully adjustable hlins suspension** (R 1250 RT) and **BMW s standard WP suspension** (R 1200 RT) feature **preload and rebound damping adjustments**, allowing riders to fine-tune the bike s behavior for their preferred riding style whether it s a smooth, plush ride for highway cruising or a firmer setup for twisty backroads. The **dual-disc braking system** with **radial-mount front brake** (R 1250 RT) and **four-piston calipers** delivers exceptional stopping power, while the **R 1250 RT s larger 320mm front disc** and **integrated ABS with cornering ABS** provide superior modulation and stability, even in wet or slippery conditions. The **R 1200 RT** retains a slightly more conservative braking setup but remains more than capable for daily use and light touring.

For riders who demand both adventure and refinement, the **R 1200 RT and R 1250 RT** are equipped with **BMW s Adventure Package**, which includes **long-travel suspension**, **knobby tires**, and **adjustable windscreen mounts** for customizable wind protection. The **R 1250 RT** takes this a step further with its **more aggressive tire options** and **revised ergonomics**, making it an ideal choice for riders who want a bike that can handle gravel roads and off-road detours without sacrificing the comfort of a true touring machine. The **11158529306 breather** a precision-engineered part of the air intake system ensures that the engine breathes efficiently, reducing backpressure and maintaining optimal power output, especially during sustained high-speed cruising or climbing steep grades. This component is particularly important for maintaining long-term engine health, as it helps regulate airflow and temperature, preventing premature wear on critical engine parts.

In terms of build quality and attention to detail, BMW s **R 1200 RT and R 1250 RT** are nothing short of exemplary. The **premium materials**, **precision machining**, and **thoughtful design touches** such as the **ergonomic handlebars, adjustable footpegs, and heated grips** reflect BMW s commitment to creating a motorcycle that feels as good to ride as it looks. The **R 1250 RT** introduces subtle refinements, including a **revised seat design** for better weight distribution and a **more integrated fairing aesthetic**, while the **R 1200 RT** retains its classic, understated elegance. Both models are available in a range of **high-quality paint finishes**, from classic **Metallic Silver** to bold **Deep Blue**, ensuring that each bike stands out on the road while maintaining a timeless appeal.

Whether you re a seasoned touring rider, a weekend adventurer, or someone who simply appreciates the perfect blend of performance and practicality, the **BMW R 1200 RT (2014 2018) and R 1250 RT (2018 2025)** with their **11158529306 breather and other refined engineering details** represent the ultimate in German motorcycle engineering. These bikes are built to last, designed to inspire, and engineered to deliver an experience that transcends the ordinary. From the **smooth purr of the boxer engine** to the **precise handling and advanced rider aids**, every aspect of these machines is crafted to make every journey an adventure worth remembering.

### **Pros and Cons of Buying a BMW R1200RT (2014 2018) and R1250RT (2018 2025) with a Modified Breather System**

#### **Overview of the Models**

The **BMW R1200RT (2014 2018)** and **R1250RT (2018 2025)** are mid-sized adventure touring motorcycles designed for comfort, versatility, and long-distance riding. The **R1250RT** is essentially an updated version of the R1200RT with minor refinements, including a slightly more powerful engine (136 HP vs. 131 HP), improved ergonomics, and minor suspension tweaks. Both bikes share a similar platform but differ in engine tuning and minor cosmetic updates.

The **modified breather system** (often referred to as a "18/25 breather") is an aftermarket upgrade that improves engine breathing by replacing the stock airbox with a larger, more efficient unit. This can enhance throttle response, reduce backpressure, and improve overall performance, especially under hard acceleration.

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### **Pros of Buying an R1200RT/R1250RT with a Modified Breather**

1. **Comfort and Touring Capabilities**

- Both bikes are built for long-distance riding with **ergonomic seating positions**, **wind protection**, and **comfortable suspension** (adjustable preload on the R1250RT).

- The **R1250RT** has slight improvements in ergonomics, making it more accommodating for taller riders.

- **Storage options** (top case, saddlebags, tank bags) make them practical for extended trips.

2. **Reliability and Durability**

- BMW s **boxer-twin engine** is known for its **long lifespan** when properly maintained. With **oil changes every 6,000 8,000 miles** and regular servicing, these engines can easily exceed **100,000 150,000 miles**.

- The **R1200RT s engine** is battle-tested, while the **R1250RT** is a refined version with minor upgrades (e.g., revised ECU mapping, slightly better fuel efficiency).

- **Frame and chassis** are robust, with **aluminum frame construction** and **paralever rear suspension**, which handles well on both pavement and light off-road trails.

3. **Performance and Power Delivery**

- **Smooth, linear power delivery** from the **1.2L (R1200RT) and 1.3L (R1250RT) boxer-twin engines**, making them enjoyable for both cruising and sportier riding.

- **Peak power (131 HP / 118 lb-ft for R1200RT, 136 HP / 122 lb-ft for R1250RT)** is sufficient for highway passing and spirited riding without being overwhelming.

- **Modified breather system** (18/25 breather) can **improve throttle response**, especially in high-RPM scenarios, by reducing air restriction. This is particularly noticeable in **hard acceleration** and **high-speed cruising**.

- **Better fuel economy** than sportier bikes (around **45 55 MPG** on the highway, depending on riding style and load).

4. **Aftermarket Support and Customization**

- **Strong aftermarket presence**, with **performance parts, exhaust upgrades, and suspension modifications** readily available.

- **Modified breather systems** (like the 18/25 breather) are **easy to install** and can be paired with other upgrades (e.g., **high-flow air filters, performance exhausts, or ECU tuning**).

- **Aesthetic customization** is straightforward, with options for **custom paint, handlebar upgrades, and LED lighting**.

5. **Resale Value and Ownership Costs**

- BMW adventure bikes **retain value well** compared to many competitors, though not as high as premium models like the **BMW GS or KTM 1290 Super Adventure**.

- **Maintenance costs** are reasonable, with **BMW dealerships offering genuine parts and service**, though third-party shops can be more affordable.

- **Insurance costs** are moderate for this class, though they can vary based on location, rider age, and modifications.

6. **Versatility for Different Riding Styles**

- **Touring**: Comfortable for long rides with minimal fatigue.

- **Commuter**: Decent for daily use, though not as nimble as a sportbike.

- **Light Adventure**: Capable of handling **gravel roads and light trails** (though not as capable as a full adventure bike like the **BMW GS or KTM 1250 Super Adventure**).

- **Track Day**: With **performance upgrades**, the R1250RT can handle **light track use**, though it s not a dedicated race bike.

7. **Safety and Handling**

- **Stable at high speeds** due to **low center of gravity** (boxer engine) and **good wind protection**.

- **Brembo hydraulic brakes** (on the R1250RT) provide **strong stopping power**, though the R1200RT uses **Brembo master cylinders with aftermarket brake upgrades**.

- **Adjustable suspension** (on the R1250RT) allows for **better tuning to rider weight and terrain**.

---

### **Cons of Buying an R1200RT/R1250RT with a Modified Breather**

1. **Weight and Maneuverability**

- **Heavy bikes** (around **500 550 lbs fully fueled**), which can make **parking, starting, and low-speed handling** more effortful.

- **Not as nimble as lighter sport-touring bikes** (e.g., **Yamaha T n r , KTM 1290 Super Adventure**), making them less agile in tight spaces.

- **Steering effort** can feel **heavy at low speeds**, though this improves at highway speeds.

2. **Engine Limitations**

- **Peak power is not overwhelming**, so they may feel **underpowered** compared to **superbikes or high-performance adventure bikes**.

- **Modified breather systems** can **increase power slightly**, but the gains are **modest** (likely **5 10 HP** depending on tuning). The biggest benefit is **better throttle response and smoother power delivery**.

- **No significant torque spike** power is **linear but not explosive**, which may disappoint riders seeking **quick acceleration**.

3. **Comfort Trade-offs for Sportier Riding**

- **Ergonomics are optimized for touring**, which can feel **clunky or stiff** for aggressive riding.

- **Seat position** is **upright and relaxed**, which may not suit riders who prefer a **more aggressive or forward-leaning posture**.

- **Wind noise** is noticeable at high speeds, though the **windscreen helps mitigate this**.

4. **Maintenance and Upkeep**

- **BMW parts can be expensive**, especially **OEM components** (e.g., **suspension, brakes, or electrical parts**).

- **Modified breather systems** require **proper installation** to avoid **oil leaks or vacuum issues**. Poorly fitted breathers can **cause engine damage** if they restrict airflow incorrectly.

- **Regular maintenance is crucial** neglecting **oil changes, chain adjustments, or suspension servicing** can lead to **premature wear**.

5. **Fuel and Consumption**

- **Fuel economy is decent but not exceptional** ( 45 55 MPG highway, **35 45 MPG with a load**).

- **Larger fuel tanks (18.5L / 5R1200RT, 19.5L / R1250RT)** provide **good range**, but **fuel costs add up** over long distances.

6. **Modification Risks**

- **Aftermarket modifications (especially exhausts, ECU tuning, or breathers) can void warranties** and may **require additional tuning** to avoid **engine stress or reliability issues**.

- **Modified breathers must be installed correctly** improper fitting can **cause oil leaks, vacuum loss, or even engine damage** if they restrict airflow excessively.

- **Riding performance modifications** (e.g., **aggressive suspension drops, heavy exhausts**) can **affect handling and comfort**, making the bike less suitable for touring.

7. **Competition from Other Adventure Bikes**

- **More capable adventure bikes** (e.g., **BMW GS, KTM 1290 Super Adventure, Yamaha T n r **) offer **better off-road performance, lighter weight, and more aggressive handling**.

- **Sport-touring bikes** (e.g., **BMW S 1000 XR, Honda NC750X**) provide a **better balance of sportiness and comfort** for riders who want **more performance without full adventure capabilities**.

- **Budget-friendly alternatives** (e.g., **Yamaha XT

Details:

The part has been thoroughly inspected and is in full working order. Cleaned and stored in a dry environment. Shows normal wear and tear. This is a used breather in good working condition, removed from 2019 BMW R1250RT with 19,500 miles.

BMW R1200RT Breather 2014 - 2018 R1250RT 2018 -2025. Removed from a running 2019 R1250RT with 19,500 miles. There is no rust or rash and it shows only normal wear tear from regular use. BMW Part #.

The breather has been cleaned, inspected, and stored in a dry, secure environment to ensure its ready for installation. Free Shipping Included. Key Features: Fully inspected and tested for functionality.

part #: 11158529306 prices

• $29.99-$97.91

specifications intakefuelmotorcycle:

• for models: R1200rt, R1250rt
• for makes: Bmw
• for years: 2014-2025
• mpn: 11158529306
• part type: Breather
• performance part: No
• country of origin: Germany

shipping intakefuelmotorcycle:

• cost: $0.00
• transit: 3-7 Days
• carrier: USPS
• type: Fixed
• service: USPS Ground Advantage
• class: Standard

returns intakefuelmotorcycle:

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

payments intakefuelmotorcycle:

• credit card: Visa
• wallet: Google-pay
• other

general intakefuelmotorcycle:

• Motorcycle Scooter Parts Accessories > Air Intake Fuel Delivery > Other Air Intake Fuel Delivery
• condition: Used

offer intakefuelmotorcycle:

• availability: In Stock
• options: Ship-to-home
• sold: 0
• started: June 9, 2026
• quantity: 1

seller intakefuelmotorcycle:

• city: Douglas, Arizona
• # reviews: 4231
• rating: 99.3%

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