Designed for KTM 85cc & 105cc and Husqvarna 85cc models, the VForce4R (VF4R) offers enhanced reed petal durability thanks to its rubber overmoulded reed cage tips and extended reed stops. It also includes all the benefits of the unique VForce reed valve design.

Unique VForce Reed Valve Design

The VForce reed valve system doubles the reed-tip surface area compared to conventional designs, delivering two major advantages:

• Reduced Reed Travel: The reed petals only travel half the distance required in a conventional reed valve, achieving the same airflow.
• Improved Performance: With reduced travel, the reed petals are more likely to fully open and seal effectively when “closed.” As an engine running at 8,000 RPM opens and closes the reeds 133 times per second, reduced travel decreases wear, extending reed life.

Standard VForce Reed Valve Features:

• Double the reed-tip surface of conventional designs.
• Increased bottom-end, stronger mid-range, and extended top-end power.
• Improved efficiency through reduced reed petal travel.
• Increased airflow for greater horsepower.
• Reduced reed petal wear.
• Screw-free design eliminates the risk of screws entering the motor and enables rapid reed petal changes.

Improved VF4 Features:

• All-new reed petal resin system, carbon fibre, and lay-up.
• Pre-curved reed petals for improved sealing at the tips.
• Wider reed cage for maximum airflow.
• 10.5% increase in total reed tip surface area for enhanced airflow.
• Airfoil-shaped cage tips to increase air velocity from outer ports.
• Long reed stops to slow petal tip velocity progressively, improving durability.
• 15.6% reduction in the frontal area of the central wing, combined with a more aerodynamic design.

All-New VF4R Features:

• Rubber overmoulding on the reed tip surface of the cage for enhanced petal life.
• Extended reed petal stops for improved durability.
• Pre-curved reed petals for better sealing at the tips.

UK Delivery Charges

Free delivery on all orders £100 and over*

All orders over £100 are delivered FREE*. All orders from the Mega Motorcycle Store are dispatched using secure couriers, which are fully insured and trackable. All customers receive an online tracking number when their order is dispatched, enabling them to track the location of their delivery online.

*Free Delivery over £100 includes mainland UK only. Excludes Northern Ireland.

UK Delivery Charges

• Orders under £100: £4.99
• 24-hour delivery: £5.99
• Saturday delivery: £14.99
• Orders over £100: FREE 48-hour delivery
• Refund charge: £2.99

Our UK delivery charges apply to remote areas such as Shetland and the Highlands. For all other destinations, please add your items to the shopping cart on the website and calculate the delivery costs to your destination.

UK Delivery Times

Orders must be placed before 1pm for same-day dispatch.

Please allow 1-2 working days for delivery within the UK.

For deliveries outside the UK, please allow 5-7 working days.

Next working day delivery cut-off time is 13:00.

Orders placed on a Bank Holiday will be dispatched on the following working day. Deliveries to Ireland and Scotland may take an extra day depending on your location.

Orders placed on a Saturday or Sunday will be dispatched on the Monday. If you have paid for Next Working Day delivery, your delivery will be due on the Tuesday.

European Delivery Since 1 July 2021, most goods to the EU (including gifts) are now subject to VAT and potentially a clearance fee. The taxes and duties applied depend on the individual contents of the parcel, the weight, and the value. We cannot estimate the costs that may occur and we are not responsible for any fees you may need to pay.

To get a shipping quote for your country, please follow the checkout process and input your delivery address.

Terms and Conditions:

Express delivery applies to mainland UK only and cannot be guaranteed for the Scottish Highlands and other isolated areas. Please contact us if you need further details.