Ten years or so ago my mate was with I believe Footman James and at renewal time for his 4 bikes the call centre chimp went through the list of whether the bikes were standard as they were supplied new . Being in a smart arsed mood he replied "NO" explaining that the tyres were not original on any of his bikes nor was the air in the tyres , that all had replacement chains and sprockets , that his 1987 Gpz750 had replacement NOS silencers fitted , his CRM 250 had replacement graphics and his XL250 Motorsport had a replacement NOS tank, seat and exhaust.
Chimp turns around and says "sorry we cannot insure you with those modifications , goodbye "