18/02/2024
For riders of the popular Honda VTX 1300, the question of performance enhancement is a common one. Whether you're looking to extract more power for spirited riding or simply want to give your V-twin a bit more grunt, understanding the available options is key. This article delves into performance kits specifically designed for the Honda VTX 1300, exploring what they offer, their impact on the engine, and how they can transform your riding experience. We'll also touch upon the stock torque figures of the VTX 1300 to provide a baseline for comparison.

- AFT Customs Performance Kit for Honda VTX 1300
- Understanding Honda VTX 1300 Torque Specifications
- Comparing Engine Architectures: VTX 1300 vs. V-Star 1300
- Riding Experience and Modifications
- Frequently Asked Questions
- Q1: Will the AFT Customs kit void my Honda warranty?
- Q2: Is the AFT Customs kit difficult to install?
- Q3: What kind of fuel should I use with the 11:1 compression pistons?
- Q4: Can I combine the AFT kit with other modifications?
- Q5: How much horsepower does a stock Honda VTX 1300 have?
- Q6: Does the Honda VTX 1300 have shaft drive?
- Conclusion
AFT Customs Performance Kit for Honda VTX 1300
Leading the charge in custom metric bike building, AFT Customs has developed a highly regarded performance kit tailored for the Honda VTX 1300 and its sibling, the Fury. This comprehensive upgrade package is designed to significantly boost the engine's output, offering a noticeable improvement in both horsepower and torque.
What's Included in the Kit?
The AFT Customs performance kit is a meticulously curated collection of essential engine components, ensuring a synergistic approach to performance enhancement. The kit typically includes:
- Performance Pistons: These are engineered to increase the engine's compression ratio. In this case, the kit features pistons with an 11:1 compression ratio, a substantial jump from the stock 9:1. Higher compression generally leads to more efficient combustion and thus, greater power output.
- Performance Cams: The camshafts are designed to alter valve timing and lift. The AFT kit's cams provide additional valve lift and duration. This allows the engine to breathe more freely, taking in more air-fuel mixture and expelling exhaust gases more efficiently, all without requiring modifications to the engine's cylinder heads.
- Gaskets: To ensure a proper and reliable seal for these upgraded components, the kit includes all necessary gaskets, specified as OEM from Honda. Using genuine Honda gaskets guarantees compatibility and durability.
The Impact of the Kit
The combination of higher compression pistons and improved camshafts results in a significant gain in performance. AFT Customs claims a notable 20% increase in horsepower and torque over the stock VTX 1300 motor. This translates to sharper acceleration, more responsive throttle input, and an overall more exhilarating ride. The increased torque is particularly beneficial for cruising, allowing the V-twin to pull strongly even at lower RPMs.
Availability and Pricing
The Honda VTX 1300 hop-up kit from AFT Customs is retailed at just under £1000. Interested buyers can purchase the kit directly from AFT Customs by contacting them via telephone at 209.223.3848. It's always advisable to confirm pricing and availability directly with the manufacturer.
Understanding Honda VTX 1300 Torque Specifications
To appreciate the gains offered by a performance kit, it's helpful to understand the stock performance of the Honda VTX 1300. While the provided text focuses heavily on the Star V-Star 1300 and Yamaha models, it offers insights into the general characteristics of 1300cc cruisers. For the Honda VTX 1300 specifically, stock figures often hover around:
| Metric | Value |
|---|---|
| Engine Capacity | 1312cc |
| Stock Compression Ratio | 9.0:1 |
| Estimated Peak Torque | Around 115-120 Nm (85-88 lb-ft) |
| Torque Peak RPM | Typically around 3000-3500 RPM |
These figures indicate a strong, torquey engine well-suited for comfortable cruising. The AFT Customs kit aims to enhance these already respectable numbers, pushing the VTX 1300 into a higher performance bracket.

Comparing Engine Architectures: VTX 1300 vs. V-Star 1300
The provided text offers an interesting comparison between the Honda VTX 1300 and the Star V-Star 1300, highlighting key differences in their engine design and performance characteristics. While both are 1300cc class cruisers, their approach to power delivery varies:
| Feature | Honda VTX 1300 | Star V-Star 1300 |
|---|---|---|
| Engine Type | Liquid-cooled, 52-degree V-twin | Liquid-cooled, 60-degree V-twin |
| Displacement | 1312cc | 1304cc |
| Bore x Stroke | 89.5mm x 104.3mm | 100mm x 83mm |
| Compression Ratio | 9.0:1 | 9.5:1 |
| Fueling | 3x 37mm Keihin Carburetors | Dual 40mm throttle bodies with EFI |
| Peak Torque | Approx. 115-120 Nm @ 3000-3500 RPM | Approx. 115 Nm (85 lb-ft) @ 4000 RPM (estimated at rear wheel) |
| Peak Horsepower | Approx. 63-67 hp | Approx. 70 hp @ rear wheel (estimated) |
| Torque Delivery | Strong low-end grunt | Stronger mid-range and top-end |
| Engine Balance | Has characteristic V-twin vibes | Counter-balanced for smoother operation |
The VTX 1300 is noted for its substantial low-end torque, making it feel very punchy from a standstill. The V-Star 1300, with its oversquare bore and stroke and fuel injection, tends to have a broader powerband with more emphasis on mid-range and top-end performance, though its peak torque arrives at a higher RPM. The VTX's engine architecture, with its longer stroke, contributes to its characteristic torquey feel.
Riding Experience and Modifications
The feel of a V-twin cruiser is often defined by its torque delivery and the character of its vibrations. The Honda VTX 1300 is renowned for its satisfying V-twin pulse, which, while present, is generally well-managed. The AFT Customs kit aims to enhance this character by providing more of it across the rev range. Riders often seek performance kits to improve acceleration, especially when carrying a passenger or luggage, or when tackling inclines.
Beyond engine upgrades, other common modifications for the VTX 1300 include:
- Exhaust Systems: Aftermarket exhausts can improve sound, reduce weight, and offer minor performance gains, often complementing engine tuning.
- Air Intakes: A less restrictive air intake can help the engine breathe more easily, especially when combined with engine remapping or performance kits.
- Fuel Management: For carbureted models like some VTX 1300 variants, rejetting or upgrading to fuel injection (a more involved modification) can optimise fuelling for performance parts.
Frequently Asked Questions
Q1: Will the AFT Customs kit void my Honda warranty?
Modifying engine components like pistons and cams typically voids the manufacturer's warranty on those specific parts and potentially the entire powertrain. It's crucial to consult your Honda dealer regarding their policy on aftermarket performance modifications.
Q2: Is the AFT Customs kit difficult to install?
Installing engine internals like pistons and camshafts is a moderately complex mechanical task. It requires significant disassembly of the engine, including removing the cylinder heads. If you are not experienced with engine mechanics, it is highly recommended to have the kit installed by a qualified motorcycle mechanic.
Q3: What kind of fuel should I use with the 11:1 compression pistons?
With an 11:1 compression ratio, it is generally recommended to use premium unleaded fuel (higher octane rating) to prevent engine knocking or pinging, which can occur when the fuel ignites prematurely under high compression. Always refer to the kit manufacturer's recommendations.

Q4: Can I combine the AFT kit with other modifications?
Yes, performance parts can often be combined. However, it's important to ensure compatibility. For instance, an aftermarket exhaust and air intake might work well with the AFT kit, but significant tuning adjustments may be necessary to optimise performance and prevent potential issues.
Q5: How much horsepower does a stock Honda VTX 1300 have?
A stock Honda VTX 1300 typically produces around 63-67 horsepower at the crankshaft, with torque figures in the region of 115-120 Nm.
Q6: Does the Honda VTX 1300 have shaft drive?
Yes, the Honda VTX 1300 features a reliable shaft drive system, which requires less maintenance than a chain drive and contributes to its smooth operation.
Conclusion
For Honda VTX 1300 owners seeking to elevate their riding experience, performance kits like the one offered by AFT Customs present a compelling option. By upgrading key engine components, these kits unlock a significant portion of the V-twin's potential, delivering a noticeable increase in power and torque. While the initial investment and installation complexity should be considered, the resulting improvement in performance can transform the character of this already capable cruiser, making it even more enjoyable on the open road.
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