Do you have to let your insurer know about basic mods?

When l changed bikes found it was cheaper getting online quote and then calling the insurer about the key mods. Having to add seat cowl, heated grips and screen just increased the number of mods to a level which made the “quote unquotable” so you had to ring anyway.

The ones l considered said they would payout stock or just noted it with no change to the referenced quote premium.