Lost your front sprocket and washer???

[7omly]

Took my sprocket cover off the other day to do a sprockets and chain change and was horrified to see the front sprocket nut was only finger tight. The nut was only being prevented from falling off the shaft  by the lock washer which itself hadn't been bent over enough. I wondered why the front sprocket seemed so noisy. I took the opportunity to fit the larger washer and it's been great  (and qiueter) since.