The Vic Roads advice on approved motorcycles for novice riders states: “…Any motorcycle modified in a way that increases its power-to-weight ratio is not LAMS approved regardless of whether it appears on the list. All motorcycle learner permit or a restricted licence holders can only ride a motorcycle in its standard manufactured form…” WA has something similar, as do the other states: “…Any motorcycle that has been modified in any way is automatically deemed to be LAMS non-compliant…” I am yet to find a copy of a set of regulations or which might provide a definition of what is deemed to be a “modification”. The closest I have found is this NSW Roads and Maritime advice: "...For a motorcycle to remain approved for use by novice riders it must not be modified in any way from its manufacturer’s standard specifications. Only motorcycles that retain all of the manufacturer’s original equipment for that model and model variant will retain novice rider status under the Learner Approved Motorcycle scheme (LAM)..." So, without getting too deep into a discussion about the effect of aftermarket exhaust modifications on performance, could fitting a slip on exhaust be non-compliant with LAMS restrictions? Are there any other other common aftermarket additions to be careful of, which may breach the requirement of “standard manufactured form” and "modified from standard specifications'? Surely, I can fit a gel seat if I need to. What about fitting a riser or changing handlebars or mirrors etc?