ACU Announce Changes for 2018 in MX Capacity Classes for Adult Competition

Monday November 27, 2017 at 4:23pm
ACU Announce Changes for 2018 in MX Capacity Classes for Adult Competition
With the 2018 season approaching the ACU Motocross Committee can now confirm that Machine Capacities will be changing for the forthcoming season. The ACU Motocross Committee have been in consultation with multiple parties over the potential introduction of revised MX1 and MX2 capacity changes in 2018 for many months.

Included in the consultation were several foreign Federations including Holland, Canada and Australia who have all trialled this change recently.

Steve McCauley Motocross Committee Chairman said: - “After much discussion and feedback from the numerous Federations as well as Teams and the Industry here in the UK it was decided not to go ‘carte blanche’ with this change. As a Committee we will always factor in important feedback from our championship partners and never bring changes in on a knee jerk reaction.”

“Therefore, we decided to introduce the changes detailed below into the MX standing regulations, which allow organisers to take advantage at all levels with the exception of the Maxxis British Championship. By doing this we feel we are moving forward but in a controlled and correct manner. This option means we can offer flexibility and diversity whilst monitoring these changes in order to plan for 2019. We have also incorporated a ground-breaking first, by allowing the 250 two-stroke to remain in MX1 as well as now adding them to MX2, resulting in greater flexibility and choices for our licence holders. Once again the ACU lead the way with innovative and measured changes”

For the 2018 season the machine capacities for MX1 and MX2 will be as follows;


120cc to 250cc two stroke or 175cc to 250cc four stroke.


Over 175cc to 500cc two stroke or 251cc to 450cc four stroke. Electric machines with a maximum output of 16kw are only allowed in the MX2 class.

» Categories: Club News, Home Page, Motocross
Auto-Cycle Union Ltd.
ACU House, Wood Street, Rugby.
CV21 2YX.
Telephone: 01788 566400