Trials bikes have never had a rear sprocket guard...
Modern or Classic...
Most of those riders have scrambled well to comply with this rule while most of us in our classic mx/dirt track scene already have these fitted to our bikes.
The ones without it fitted are the minority group...
Here's a financial tip...
Invest your money into companies that manufacture cut out lanyards...
We dont want em...theres no talk of them in our sport as far as im aware but they're now mandatory in trials