The MX450 is offered as a fully ADR Approved Motorcycle.
The manufacture delivers the motorcycle in ADR Spec so that it can be road registered however many riders want to be able to derestrict their MX450 for race use.
Your dealer can offer a "De Restriction" service but please understand this will not be done by the manufacture so it is at the cost of the customer. Please understand this is for race use only.
Once the bike is de restricted it is no longer roadworthy. Just like if you fit an after market exhaust to your Harley Davidson it is no longer roadworthy and you risk defect.
Many riders ask us what are the key restrictions on the MX450 that have been installed to ensure it is LAMS approved and meets ADR requirements for the road, they are the following:
1. Throttle restriction. An aftermarket throttle will allow the throttle to open wide. We suggest this for off road competition use.
2. Muffler Restriction. 15mm diameter at the end of the muffler. The baffle is removable for competition use.
You can see all the Options, Extra's and Performance Upgrades on this page: https://braaapmotorcycles.com/pages/mx450-options-upgrades