How to run live timing at a club motocross event

You don't need a timing van or a five-figure system. A transponder, a loop and one USB box on a laptop will time a full grassroots meeting — and put live positions on every phone in the paddock.

Timing used to be the part of running a club meeting that put people off — expensive kit, a specialist to operate it, and results that didn't appear until long after the chequered flag. It doesn't have to be like that any more. Here's what's actually involved in timing a grassroots motocross event, and how little hardware it really takes.

What you actually need

Four things time a whole meeting:

Transponders — one small tag per rider, fitted to the bike or the rider.
A timing loop — an antenna cable laid across the track at the start/finish line that reads each tag as it passes.
A decoder — a RaceResult USB timing box that turns those reads into timestamped crossings.
A laptop running Roost MX Timing — sign-on, race control, live timing and results, all in one place.

RaceResult USB timing box — One RaceResult USB box times the whole event

How transponder timing works

Every time a rider crosses the loop, their transponder is read and the decoder records a crossing — a tag ID and a precise timestamp. The software turns those crossings into lap times and live positions: the first pass registers the rider onto the track, and each pass after that completes a lap. Because it's timing to the tag, it doesn't matter how tight the pack is or who's a lap down — everyone is scored correctly.

Loop tip

Keep the loop flat across the line and clear of metal, and mount the box out of the weather with a clear run to the antenna. A tidy loop is the single biggest factor in clean, no-miss reads on race day.

Setting up the event

Before the gate drops you build the meeting once: create the classes, sign riders on and hand each one a transponder, and set the race order. Sign-on is where riders are matched to their tags and their class, so the moment they cross the line they're scored in the right place. From there, race control runs the day — arm a race, start it, and the crossings do the rest.

Race day: live timing on every phone

This is what changes the feel of a club meeting. As riders cross the line, positions and lap times update on a live leaderboard that anyone can open on their phone from a web link — no app to install. Parents on the fence, riders in the pits and the commentator all see the same live order, split by class. It turns "who's winning?" from a guess into a glance.

Championships and results

Points are worked out per class as each round finishes, and season standings add up on their own — including best-of drop-score projections when your series drops a rider's worst rounds. At the end of the day you print per-class results and trophy sheets straight from the same screen, ready for the podium.

When there's no signal

Plenty of tracks sit in a field with no bars. Roost MX Timing keeps timing through a full day completely off-grid — everything is logged locally on the laptop and the decoder — then syncs up when you're back in coverage. You never lose a crossing waiting for a connection.

Time your next meeting with Roost MX Timing

Open the live timing platform, or get your club set up for the season.

Open live timing → Set up your club

Riding rather than running the event? Read our two-stroke jetting guide →