Fast laps, tight corners and close finishes. To get good at karting, you need a lot of practice. The ultimate tool to help you during your practice sessions is the MYLAPS Kart FLEX transponder. The transponder registers lap times and counts the number of laps. It also shows race and finishing positions at events and ultimately determines the winner.

Choose your products

The Kart FLEX transponder is subscription-based. You can easily extend your subscription online. Kart FLEX transponders can be used at both outdoor and indoor kart tracks.
Already have a FLEX transponder and want to extend your subscription? Renew here.

Including: holder and clip, charging cradle, AC and DC power adaptor, software and support.

  • 1year subscription

    • 365 days, try now
    • Insurance included
    • Unlimited warranty
  • 2year subscription

    • 730 days, save 30%
    • Insurance included
    • Unlimited warranty
  • 5year subscription

    • 1825 days, save 50%
    • Insurance included
    • Unlimited warranty
Learn more

How does it work?

The track you’re racing on has a MYLAPS system installed at the start and finish line and at intermediate points along the track. The system picks up the signal sent out by the transponder mounted on your kart. This signal is analyzed and lap times are measured. The system knows exactly on which lap you are and what your position is. This data is passed on to race officials and published to your personal MYLAPS account on mylaps.com.

*Ask your club or race organization if they support MYLAPS transponders.

Your personal data

Your training and event results are uploaded by the track's system or race officials. You can check, analyze and share your performance data on your personal account online. Go to mylaps.com to create a personal account and register your transponder.

Activate your subscription

After purchasing your Kart FLEX transponder and subscription you need to activate it by using the FLEX Manager.

Download FLEX Manager

Do you need any help with your device or with the registration of your transponder online? Please check our support page.



Easy to set up and maintain
Your FLEX transponder is easily installed by using the holder and clip. This should be done at a maximum height of 30 cm (1 ft) above the ground. It is water resistant and shockproof and suitable for both indoor and outdoor use. FLEX transponders are rechargeable: a full charge takes approximately 16 hours. A fully charged transponder will easily get you through a race weekend: it will keep working for a minimum of 4 days. Your transponder can get a bit dirty over time. Simply clean it with a damp cloth and lukewarm water and clean the connector pins with a cotton tip.

Insurance and Warranty
Your subscription comes with insurance. It covers damage as a result of accident or fire – but not theft or loss. This means MYLAPS will guarantee the device keeps working and is in good order. We provide an unlimited guarantee for the duration of your subscription. Should any problems occur during normal use – as described in the manual – MYLAPS will repair or replace your transponder free of charge.

Warranty & insurance

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