Neal, asuming she runs okay and she did yesterday then why not DIY, especially as its a a carb 2 stroke, so fairly simple and a mornings work.
New plugs, change gearbox oil (3 tubes required) check water pump, check annodes, drain carbs, clean out fuel filter (Richard B did a good post a while back) grease everything and spray power head with Quicksilver spray stuff.
Check battery and wheel bearings at the same time.
£40 for bits or £150 for dealer to do the same thing if you can find one not snowed under with work at the moment.
Ribnet is best viewed on a computer of some sort