Hiya
Which size monster are you looking at? IMHO belts will go well over their service interval IF they are correctly tensioned, have seen more broken/tatty belts due to them running too loose than being too old? Belt changing on a 2valve engine can take 30 minutes with a little experiance, plenty of videos & help on here to guide you? Really not that hard!
Shims? Depending on where you read these can have a 0.2mm gap before needing swapping??! In all reality this is given to lengthen service intervals, your closer shims should be as tight as possible, there is a leaf-spring arrangement to shut the valves to enable easier starting - & you cant hear much over the clutch rattle anyways.
Swap the oil, filter & belts out as soon as you get it, this will give you a solid datum to work from & certainly wont hurt the bike.
Which size monster are you looking at? IMHO belts will go well over their service interval IF they are correctly tensioned, have seen more broken/tatty belts due to them running too loose than being too old? Belt changing on a 2valve engine can take 30 minutes with a little experiance, plenty of videos & help on here to guide you? Really not that hard!
Shims? Depending on where you read these can have a 0.2mm gap before needing swapping??! In all reality this is given to lengthen service intervals, your closer shims should be as tight as possible, there is a leaf-spring arrangement to shut the valves to enable easier starting - & you cant hear much over the clutch rattle anyways.
Swap the oil, filter & belts out as soon as you get it, this will give you a solid datum to work from & certainly wont hurt the bike.