Don't miss out this Christmas Order now
Rated 4.9 on Trustpilot
Free UK delivery on selected bikes and parts
1,000+ UK riders trust Garland
Revvi 350W Brushless Upgrade Kit – Fits 16” & 16 Plus (Full Performance Upgrade Kit)
4.9Excellent241 reviews on Trustpilot

Revvi 350W Brushless Upgrade Kit – Fits 16” & 16 Plus (Full Performance Upgrade Kit)

£199.00

or 3 payments of £66.33 with Klarna

Pay in 3 with Klarna

  • Split your purchase into 3 interest-free payments, taken every 30 days.
  • Choose Klarna at checkout. No fees when you pay on time.
  • 18+, UK residents only. Credit subject to status. T&Cs apply.
  • Missed payments may affect your ability to use Klarna and could affect your credit score.
No reviews
Tracked UK courier delivery Sent from our UK warehouse. Estimated delivery date shown at checkout.
Delivery info
30-day returns On unused items in their original packaging.

Delivery information

  • Sent from our UK warehouse by tracked courier, such as APC Overnight.
  • Tracking details are emailed once the courier has your order.
  • An adult may need to be in to receive larger deliveries.
  • Parts and accessories may arrive separately from your bike.
  • Delivery can take longer around bank holidays, Black Friday and Christmas.
  • We are online only, so collection is not available.

Returns

  • Changed your mind? Return unused items within 30 days of delivery.
  • Items must be unused, undamaged and complete, with all accessories and original packaging.
  • A bike that has been ridden or used may be refused, or refunded at a reduced value.
  • Arrived damaged or incorrect? Contact us promptly, ideally within 48 hours, with your order number and photos.
  • Return postage is paid by you for a change of mind. We cover it if the item is faulty or incorrect.
  • Refunds go back to your original payment method within 14 days of us receiving the item.
  • Please contact us before sending anything back, so we can give you return instructions.

This does not affect your statutory rights.

  • Description

    Upgrade your Revvi 16” or 16 Plus to a full 350W brushless setup.

    This complete upgrade kit significantly increases power, acceleration and top speed, transforming your bike into a much more performance-focused ride.

    ✔ In stock now with fast UK delivery

    What’s Included

    • 350W brushless motor
    • High-output 24V 5.0Ah battery (RED)
    • Control unit matched to motor
    • Mounting bracket
    • Upgraded chain and rear sprocket/freewheel

    Performance Upgrade

    This kit delivers a noticeable increase in:

    • Acceleration
    • Torque (pulling power)
    • Top speed

    Perfect for riders who have outgrown the standard setup and want more performance.

    Sprocket Options

    You can choose between two gearing setups:

    • 10T Front / 16T Rear – Higher top speed (approx. 19mph)
    • 9T Front / 20T Rear – More acceleration (approx. 15mph)

    Choose based on whether you want more speed or quicker acceleration.

    Important Compatibility Information

    This kit is designed for Revvi 16” and 16 Plus bikes only.

    • ✔ Fits Revvi 16" and 16 Plus models
    • ✖ Not suitable for Revvi 12"
    • ✖ Not compatible with standard batteries

    Battery Warning (VERY IMPORTANT)

    The RED high-output battery included in this kit must ONLY be used with this 350W setup.

    • ✖ Do NOT use standard black Revvi batteries with this kit
    • ✖ Do NOT use this battery on standard bikes

    Incorrect use can damage components.

    Speed Switch Requirement

    This kit is designed for bikes with a 3-speed switch.

    If your bike currently has a 2-speed switch, you will need to upgrade to a 3-speed switch for correct operation.

    Installation Information

    • Requires mechanical knowledge to install
    • Rear sprocket/freewheel removal required
    • Special tools may be needed

    We recommend professional installation if you are unsure.

    Is This Upgrade Right for You?

    This kit is ideal for:

    • Experienced young riders
    • Riders who want more speed and performance
    • Upgrading from standard Revvi setups

    If your rider is still learning, sticking with the standard setup may be the better option.

  • Delivery & Returns

    Delivery

    Our Revvi spare parts are held in UK warehousing and we aim to dispatch all in-stock orders within 1–2 working days.

    At checkout, you'll be able to choose from the available delivery services, including Standard and Express shipping, depending on how quickly you need your order.

    Once your order has been dispatched, you'll receive tracking details via email.

    Returns

    If you've ordered the wrong part, you can return it within 30 days of delivery, provided it is:


    • Complete with all original packaging

    • Unused and unmodified

    • In a clean, resalable condition

    Please note that return postage costs are the responsibility of the buyer, unless the item is faulty or supplied incorrectly.

    Electrical Items

    For safety and quality assurance reasons, we do not accept returns or exchanges on electrical items (including batteries, chargers, controllers, displays, motors and wiring components) unless the item is found to be faulty upon delivery.

    If you are unsure whether a part is suitable for your bike, please contact us before ordering and we'll be happy to help ensure you purchase the correct item.

Reviews

What our customers say

Trustpilot
View all reviews

Revvi full-face helmet sizes

How to measure

Measure around the widest part of the rider's head. The tape should pass above the eyebrows and ears and around the fullest part at the back of the head.

SizeHead circumference
XS, Extra Small48 to 50cm
S, Small51 to 54cm
M, Medium55 to 58cm
L, Large59 to 61cm

Always choose by the rider's actual head measurement, not by age. Head shape can also affect how a helmet fits.

Between sizes? Do not automatically choose a larger helmet for growing room. A helmet must fit securely now. If the rider falls between sizes, check the fit carefully before use.

Amped AMP-1 helmet sizes

How to measure

Measure around the widest part of the rider's head. The tape should pass above the eyebrows and ears and around the fullest part at the back of the head.

SizeHead circumference
M, Medium54 to 58cm
L, Large58 to 62cm

Always choose by the rider's actual head measurement, not by age. Head shape can also affect how a helmet fits.

Measuring exactly 58cm? That falls in both sizes. Fit varies with head shape, so check the measurement and that the helmet sits securely before use. Do not choose a loose helmet to allow growing room.

Revvi riding jersey sizes

Choosing a size

The Revvi Kids Riding Jersey comes in dedicated sizes for younger children and growing youth riders. Select the size before adding it to your basket.

SizeAge guide
Age 2About 2 years
Age 3About 3 years
Age 4About 4 years
Age 5About 5 years
YS, Youth SmallAges 6 to 7
YM, Youth MediumAges 8 to 9
YL, Youth LargeAges 10 to 11

Ages are a guide only. Consider the child's height, build and preferred fit too.

Between sizes? If the rider is between sizes, still growing or likely to wear a base layer underneath, the larger size may be more comfortable.

Kids riding jersey sizes

How to measure

Compare these with a jersey or long-sleeve top that already fits the rider well. Chest width is measured across the front with the jersey laid flat, so it is half the full chest.

SizeAge guideHalf chestLength
2 to 3Ages 2 to 331cm49cm
3 to 4Ages 3 to 433cm51cm
4 to 5Ages 4 to 535cm53cm
5 to 6Ages 5 to 637cm55cm
6 to 7Ages 6 to 739cm57cm
YS, Youth SmallAges 7 to 941cm59cm
YM, Youth MediumAges 9 to 1145cm63cm
YL, Youth LargeAges 11 to 1449cm67cm

Ages are a guide only. The chest width and body length are the best way to choose.

Riding glove sizes

How to measure

Palm: straight across the widest part of the palm, not including the thumb.
Length: from the base of the wrist to the tip of the longest finger.

SizeAge guidePalm widthHand length
2 to 3Ages 2 to 36.5cm11.5cm
4 to 5Ages 4 to 57cm12cm
6 to 7Ages 6 to 77.5cm12.5cm
YS, Youth SmallYouth Small8cm13.5cm
YM, Youth MediumYouth Medium8.5cm14cm

Use the measurements rather than age alone. Hand shapes vary, so check both wherever possible. Once fitted, make sure the rider can comfortably use the throttle, brakes and every handlebar control.

Between sizes? The larger size usually gives a more comfortable fit and a little growing room, but the glove must not get in the way of safe control of the bike.