Regulations for the Bemsee 250cc Race Class are a combination of the ACU Road Race Regulations (which apply to all classes) plus the Technical Regulations laid down by the British MZ Racing Club.
Rain Lights required from 2015 – you must have one fitted all the time!
Other helpful information which are worth a read:
A Guide to MZ Race Bikes – Advice from MZ racers
MZ Gearing Calculator – Download
MZ Tuning Guide – PDF
If you are unable to find what you are looking for, then please post on the Technical Forum and someone will get back to you.
Alternatively you can contact a member of the MZ Technical Committee. Details under Tuners on the Contact Us page.