Hello sweethearts. Mr. ER-5 is starting to develop a 'popping' noise when I go down hard on the overrun which it never used to do. My general riding style is high revving (especially when I've gone out to play) so I do use the overrun to slow down and have done for well over 10,000 miles. I few months ago on the way back home I heard some gentle popping while I was on the overrun on the way back up my road and it did it regularly today while slowing down after bouncing it off the rev limiter while on a 50 mile hoon. It's due for a service in about 2,500 miles (before the French run in late May) and from what I've read here over the last year the general suggestion is adjusting the valve clearances(?) which I assume is what needs to be done with the ER-5 when it hits the 25,000 mile service. Does that sound like a reasonable assumption and is it likely to be expensive as I'll mention it as part of the service. Should I get it done now, or should I wait for a couple of thousand miles to pass?