I've just had a 33K dealer service on my seven year old 1200GS at a cost of £680 which included two Tourance Next tyres. I'm still trying to come to terms with the cost and part of the therapy will include understanding what the hell I've paid for. Apart from the labour cost, tyres and oil are a major part of the bill but there are also 21 valves at £2.79 each plus vat (part number 36317653064). Can anyone advise me on what valves are for as 21 strikes me as being rather a lot and I'm still struggling to understand why it's an odd number.
Words of wisdom gratefully appreciated.
Words of wisdom gratefully appreciated.

