TRIUMPH 70-3925 Cylinder Head 9-BOLT

( Manufacturer Part Number: 70-3925 ), ( Type: Cylinder Head ), ( Engine Type: 4-stroke ), ( Material: Aluminum ), ( Vintage Part: Yes ), ( Finish: Unfinished ), ( Country Of Origin: United Kingdom ), ( Performance Part: No )

Review TRIUMPH 9-bolt Cylinder Head fits T120

The Triumph 70-3925 T120 9-bolt cylinder head is a premium component designed for Triumph motorcycles with a T120 engine. This cylinder head is engineered to deliver exceptional performance, reliability, and durability for riders who demand the best from their motorcycle.

The cylinder head features a 9-bolt design, which provides enhanced clamping pressure and increased cylinder head gasket sealing surface area. This results in improved sealing, reduced exhaust gas leakage, and better combustion efficiency. The head also comes with pre-machined and fitted valve guides, making the installation process smoother and more efficient for mechanics.

The Triumph 70-3925 T120 cylinder head is manufactured using high-quality materials and the latest manufacturing techniques. The cylinder head includes new inlet ports and exhaust ports, which are designed to optimize air and fuel flow for more power and torque. The head also comes with new larger valves, which provide better air and fuel mixture for improved combustion and increased power output.

The cylinder head is compatible with Triumph's latest engine management systems, ensuring optimal fuel injection, ignition timing, and exhaust emissions. The head also comes with revised cooling passages, which provide better cooling efficiency and help to maintain optimal engine temperature for consistent performance.

Additionally, the Triumph 70-3925 T120 cylinder head features a modern design with a satin finish. This not only looks great but also provides excellent corrosion resistance, ensuring the head remains in excellent condition even in harsh riding conditions.

Overall, the Triumph 70-3925 T120 9-bolt cylinder head is an excellent upgrade for any Triumph T120 motorcycle. It delivers increased power and torque, improved reliability, and enhanced durability, making it an essential component for riders who demand the best from their motorcycle.

The Triumph 70-3925 T120 9-bolt cylinder head is a popular choice among Triumph motorcycle enthusiasts for various reasons. Here are some pros and cons that might help you make an informed decision about purchasing this cylinder head:

1. High Performance: This cylinder head is known for its high performance capabilities. It has larger valves and ports, which allow for increased air and fuel flow, resulting in better power output and improved throttle response.

2. Durability: The Triumph 70-3925 T120 9-bolt cylinder head is made of high-quality materials and is built to last. It can withstand the rigors of high-performance riding, making it a great option for those who want to get the most out of their motorcycle.

3. Compatibility: This cylinder head is compatible with a wide range of Triumph motorcycles, including the T100, T120, and Bonneville. This makes it a versatile option for Triumph owners.

4. Improved Cooling: The Triumph 70-3925 T120 9-bolt cylinder head comes with larger cooling fins, which help to improve cooling efficiency. This is important for maintaining engine temperature and preventing overheating.

1. Cost: The Triumph 70-3925 T120 9-bolt cylinder head can be quite expensive, especially when compared to stock cylinder heads. This might be a deterrent for some buyers who are working with a tight budget.

2. Installation: Installing this cylinder head can be a complex process and requires a certain level of mechanical expertise. It is recommended that the installation be done by a professional to ensure that it is done correctly and safely.

3. Fuel Mileage: Installing this high-performance cylinder head might result in reduced fuel mileage. This is due to the increased power output, which requires more fuel to be burned.

The Triumph 70-3925 T120 9-bolt cylinder head is a high-performance option for Triumph motorcycle owners who want to get the most out of their bike. It offers improved power output, durability, compatibility, and cooling efficiency. However, it comes with a higher cost, complex installation process, and reduced fuel mileage. Ultimately, the decision to purchase this cylinder head depends on your budget, mechanical expertise, and riding preferences. If you are looking for high performance and are willing to invest in the cost and installation, then this cylinder head might be the right choice for you. If you are working with a tight budget or prefer better fuel mileage, then you might want to consider other options.

Details:

This cylinder head is designed for 4-stroke engines and an original equipment manufacturer OEM part Triumph motorcycles. This product is a genuine Triumph cylinder head with the part number 70-3925. Part is sold as. Triumph T120 9-Bolt Cylinder Head comes from a Tiger TR6R and has two hairline cracks at the bolt holes as shown in images.

part #: 703925 prices

• $110.00-$327.14

specifications cylindermotorcycleiz:

• for models: T120
• for makes: Triumph
• mpn: 70-3925
• type: Cylinder Head
• engine type: 4-stroke
• material: Aluminum
• vintage part: Yes
• finish: Unfinished
• country of origin: United Kingdom
• performance part: No

general cylindermotorcycleiz:

• condition: For parts or not working
• Motorcycle Scooter Parts Accessories > Engines Engine Parts > Cylinder Heads

seller cylindermotorcycleiz:

• city: Tulsa, Oklahoma
• rating: 0.0%
• # reviews: 0

returns cylindermotorcycleiz:

• policy: No Returns

shipping cylindermotorcycleiz:

• carrier: USPS
• cost: $10.21
• transit: 4-11 Days
• class: Standard
• type: Calculated
• service: USPS Ground Advantage

offer cylindermotorcycleiz:

• best offers: True
• started: February 9, 2026
• sold: 0
• options: Ship-to-home
• availability: In Stock
• quantity: 1

payments cylindermotorcycleiz:

• wallet: Paypal
• credit card: Discover
• other

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