Fixed

[Gazza M]

fixed, spark plug had worked its way loose.

I was pootling along at about 30 when suddenly all hell broke loose - didn't lose power or anything, but a horrible loud rattling sound came from the top end of the engine. At idle it's pretty loud, increases with revs. I didn't dare rev above about 3k with it.

At first I thought it was exhaust blowing, couldn't see anywhere. I did the valve clearances a few hundred miles ago, petrified now that I didn't do the locknuts up tight enough and one's let go, or cam chain tensioner letting go?

Got a video here

I was about a mile from home so luckily managed to push it there...
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Past: '07 YBR125, '00 GPZ500S, '99 ZRX1100, '98 CBR600 track bike, '97 ZX9R
Present: '05 R6 track bike, 140 pit bike