Kawasaki Ninja 400 Ninja400R Norton Racing Over Bored Throttle Body Bodies Superbike New

Norton Racing Over-Bored Throttle Body – Kawasaki Ninja 400 / Z400

Name: Norton Racing Over-Bored Throttle Body - Kawasaki Ninja 400 / Z400
Brand: Norton Motorsports / Norton Racing
SKU: _000074
Availability: InStock

$495.00

FREE US SHIPPING on this item!

Once you place your order, we will contact you with information about sending in your OEM throttle body for core credit.

***When you send in your throttle body, please send it just like the picture. Remove the fuel pipe, injectors, and rubber grommets, as well as the throttle cable mount.

No refunds for sending in your throttle body after completion.

Norton Racing Overbored Throttle Body - Kawasaki Ninja 400 Norton Racing Overbored Throttle Body - Kawasaki Ninja 400

When building a Kawasaki Ninja 400 Superbike, or just giving your street bike a little more umph, air flow becomes a problem, and overboring the throttle body to increase flow is the cure. We have dyno tested performance with straight bore and tapered bore throttle bodies and prefer to use the largest straight bore throttle bodies for maximum performance. Our Kawasaki Ninja 400 throttle bodies are bored more than 2mm over the OEM size to increase air flow. New butterfly valves are installed and additional proprietary changes are made to increase air flow based on our own dyno testing.

Available options:

OEM Throttle Body Core Charge OEM Throttle Body Core Charge

Don't want to send in your throttle body first? Order one through us! No refunds for sending in your throttle body after completion, this is offered for convenience only.

Available options:

No OEM Throttle Body Core Charge
OEM Throttle Body Core Charge - Kawasaki Ninja 400
$330.00

$495.00

SKU: _000074 Categories: Kawasaki Ninja 400 2018+, Kawasaki Ninja 500 2024+, Kawasaki Z400 2019+ Brand: Norton Motorsports / Norton Racing

Description

Boring the throttle body oversized is an excellent way to increase air/fuel flow into the engine and the results are excellent. Here’s two dyno charts showing the difference our bored throttle bodies made on my bike with just a full exhaust, and with a full exhaust and our Superbike Velocity stacks. The bike was retuned for the additional air flow, and you can see, the improvement is significant!

Kawasaki Ninja 400 Ninja400R Norton Racing Over Bored Throttle Body Bodies Superbike Dyno Horsepower.jpg