Re: Front sprocket nut fell off! Help!
there is a recall on the '03 bikes for that nut and lock washer. i didn't know about it until i took my VIN up to the local shop so that they could run it and confirm that the bad coils i had were covered by a service bulletin. they were, and he ordered them ... but he also handed me that sprocket nut and lock washer sayng, "these are recalled on this bike, you'll want to replace these as soon as you get a chance". so you can call yamaha, but they've already acknowledged there's a problem. you're lucky you found out the way you did, it could have been messy.