CSR 58mm Throttle Body for 2017-Newer Harley M8 Touring and Softail Motorcycles

CSR 58mm Throttle Body for 2017-Newer Harley M8 Touring and Softail Motorcycles

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$790.00

 

Fitment: 2017-Newer Harley M8 Motorcycles (Touring and Softail Models) NOTE: WILL NOT FIT 2023/2024 CVO 121″ Models

A refundable core charge may apply to purchase this item.

We utilize your stock core electronics and build them into a new throttle body casting, CNC ported manifold, complete with new intake flanges and seals. Our throttle bodies are compatible with stock map sensors, fuel rail and cruise control and are all designed to increase airflow and improve performance.

You can choose from the drop down menu below if you want to pay the core charge and have your throttle body shipped out within 2-3 business days (if it is in stock) or you can choose to not pay the core charge and we will ship your throttle body out after we receive your stock throttle body in house .  Core charges will be refunded as soon as your working stock throttle body has been received and tested.  PLEASE NOTE: Cycle Solutions does not keep all intake sizes in stock.  Some throttle bodies can take 1-3 weeks to ship.

These throttle bodies come with a 1.9 stock intake runner size.

 

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SKU: 58MMTBM8-1 Categories: , , , , , , , , , , Brand: ,

Description


Fitment: 2017-Newer Harley M8 Motorcycles (Touring and Softail Models)

NOTE: WILL NOT FIT 2023/2024 CVO 121″ Models

The CSR 58mm throttle body for Harley M8 delivers increased airflow and sharper throttle response for riders who demand more performance. This throttle body supports both stock and performance-built engines, making it a strong upgrade for Touring and Softail models.

Because the larger 58mm bore improves airflow, your engine can breathe easier and respond faster. As a result, riders experience smoother acceleration and improved power delivery across the RPM range.

This Harley M8 58mm throttle body installs cleanly and integrates seamlessly with compatible intake and tuning setups. Whether you ride daily or push your bike hard on long trips, this upgrade supports consistent performance.

Key Features

  • 58mm bore for increased airflow

  • Improves throttle response and acceleration

  • Precision-machined for Harley M8 engines

  • Designed for Touring and Softail models

  • Supports stock and performance engine builds

Our dyno shows huge gains on the M8 engines when using our quality products. This dyno graph is for our 2017 Road King. We installed the D&D Billet Cat exhaust system, a Thundermax auto tune module, CSR air intake, 58mm CSR throttle body and a T-man 216 Cam chest upgrade. This bike gained 38 horsepower which is incredible!

M8 Throttle Body Upgrade Graph

Add High Flow Injectors to your Throttle body

Horsepower Inc High Flow Injectors are a direct drop-in replacement for Harley Davidson Motorcycles.  These injectors feature a specifically engineered spray pattern that optimizes fuel atomization.  These injectors have a fuel deliver rate of 6.2gps and are highly recommended for engines making or exceeding 110 horsepower.

 

Need to upgrade your air intake to match your new larger throttle body?

Cycle Solutions Inc offers several styles of motorcycle air intakes that have a backing plate specifically for a 58mm and larger throttle body.  Our intakes have larger openings that match up perfectly to our large throttle bodies so that there is no air flow restrictions letting your throttle body breathe!  Be sure to check out our air intake section when purchasing a larger throttle body.

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