1. Motorcycle Carburetors Offers
  2. sku: 1375747235028681
  3. MIKUNI 4R4-005786

MIKUNI 4R4-005786 Dual Carburetors 1979-1980-1981

fits model: Xs400s. make: Yamaha.

4r4-005786 Mikuni 1979-1980-1981 Yamaha Xs400s Motorcycle Oem Dual Carburetors

( Brand: Mikuni ), ( Choke Type: Mechanical ), ( Type: Carburetor ), ( Manufacturer Part Number: 4R4-005786 ), ( Vintage Part: Yes ), ( Country/region Of Manufacture: Japan )

Review MIKUNI 1979-1980-1981 Yamaha Motorcycle Oem Dual Carburetors fits XS400S

The Mikuni 4R4-005786 carburetors are a perfect match for Yamaha XS400S motorcycles manufactured between 1979 and 1981. These carburetors are renowned for their high-performance capabilities and fine-tuning potential, making them an excellent choice for riders who value optimal engine efficiency and power.

These Mikuni carburetors are equipped with 38mm throttle bodies, which provide a large venturi area for improved airflow and better fuel-air mixture creation. The utilization of Mikuni's unique butterfly valve design allows for precise fuel metering and air-fuel ratio control, ensuring a smooth and responsive power delivery.

One of the key features of these carburetors is the adoption of Mikuni's TPS (Throttle Position Sensor). By continuously monitoring the throttle valve position, this sensor facilitates progressive fuel delivery, enabling the engine to run more efficiently and smoothly across various engine speeds and loading conditions.

These carburetors are also fitted with Mikuni's unique idle jet system, which makes it easy to fine-tune the engine's idle performance. As a result, the XS400S will idle more stably and consistently, contributing to a more enjoyable and responsive riding experience.

Additionally, these Mikuni 4R4-005786 carburetors come with rebuild kits, ensuring that the rebuilding process is more accessible and cost-effective for riders who prefer maintaining their motorcycles at home. The kits include essential components such as float needles, emulsions tubes, and jets, making it easier for you to keep your carbs in top condition.

In conclusion, the Mikuni 4R4-005786 carburetors offer a superior performance improvement for Yamaha XS400S motorcycles from 1979 to 1981. Their large 38mm throttle bodies, fine-tuning capability through the use of a TPS and the included rebuild kits make them an excellent investment for riders who demand the best from their machines.

Mikuni 4R4-005786 Carburetors for Yamaha XS400S: A Comprehensive Analysis

Introduction:

The Mikuni 4R4-005786 carburetors are aftermarket replacements often recommended for Yamaha XS400S motorcycles manufactured between 1979 and 1981. The following analysis provides an in-depth examination of the advantages and disadvantages of installing these carburetors on your XS400S.

Pros:

1. Improved Performance: Mikuni carburetors are known for their precise fuel metering, leading to improved engine performance. The 4R4-005786 model is no exception.

2. Fuel Economy: While the primary focus is often on performance, Mikuni carburetors are also reported to offer better fuel economy compared to the OEM carburetors.

3. Easy Tuning: Mikuni carburetors feature needle jet kits that make the tuning process more accessible for enthusiasts, allowing them to fine-tune the fuel mixture as needed.

Cons:

1. Cost: Mikuni carburetors generally come at a higher price point than their stock counterparts, which could be a deterrent for some.

2. Complex Installation: Installing Mikuni carburetors can be a complex process, requiring additional time, effort, and tools to ensure proper installation and tuning.

3. Syncing: Dual-carburetor installations require each carburetor to be perfectly synchronized for optimal performance. For the XS400S, this could be a challenge due to the intricacies of the engine design.

Conclusion:

The Mikuni 4R4-005786 carburetors present a balance of advantages and disadvantages when installed on a Yamaha XS400S. While they may offer improved performance and fuel economy, their complex installation, higher cost, and required tuning skills could deter some riders. Ultimately, the decision to install these carburetors should be based on individual priorities, budget, and comfort with complex motorcycle modifications.

Recommendation:

For those who are skilled DIYers, willing to invest in high-performance components, and want the best possible fuel mileage and engine response, Mikuni 4R4-005786 carburetors are an excellent choice for upgrading the Yamaha XS400S. However, for those with less experience or limited budgets, it's crucial to consider the complexity and cost involved before pursuing this upgrade. To maximize the chances of a successful and worry-free installation, it could be wise to consult experienced professionals at a reputable motorcycle shop.

specifications iodacarb:

  • for models: Xs400s
  • for makes: Yamaha
  • brand: Mikuni
  • choke type: Mechanical
  • type: Carburetor
  • manufacturer part number: 4R4-005786
  • vintage part: Yes
  • country/region of manufacture: Japan

seller iodacarb:

  • rating: 99.5%
  • # reviews: 8964

returns iodacarb:

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

payments iodacarb:

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

general iodacarb:

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

shipping iodacarb:

  • cost: $0.00
  • type: Calculated
  • class: Standard
  • service: FedEx Ground or FedEx Home Delivery
  • transit: 4-9 Days
  • carrier: FedEx

offer iodacarb:

  • started: December 1, 2024
  • options: Ship-to-home
  • sold: 0
  • availability: In Stock
  • quantity: 1
for models: xs400s, for makes: yamaha, choke type: mechanical, type: carburetor, vintage part: yes, country/region of manufacture: japan,
category: motorcycle parts > motorcycle scooter parts accessories > air intake fuel delivery > carburetors, sku: 1375747235028681,

Mikuni 4R4-005786 Is Similar To:

iodacarb logo