Originally Posted by xtremity
I know it depends on how you ride your bike but on average for road use how many miles would you expect to get out of the original chain?
I had just set the chain to the correct tension 30-40mm, went on a 300 mile road trip and when I went to ride it next time I found that I needed to adjust the chain tighteners another notch.
The bike has done about 8000 miles.
Could be a sign your original chain is nearing its end.
Stock OEM Yamaha chains are not usually the best chains made. They don't typically last all that long. As you say, much depends on how you ride and how you care for your chain. But typically, a stock chain will be worn out between 10 to 12,000 miles. Rain riding shortens chain life.
I would buy a new DID VM X-Ring chain. Use Yamaha stock sprockets, they are fine. The DID chain will last over 20,000 miles.
Better to adjust chain to just slightly loose than too tight. The DID chain will not stretch. Just does not happen until perhaps the last 1000 miles of its life. Yes, its more money. Worth it.
Don't use cheap sprockets or sprockets that make "miracle" claims. All BS. Stock ones are best (IMO) ... or use AFAM or Renthal. Both equal to or better than stock OEM sprockets but probably more money.
If you put on another cheapo chain (stock Yam or EK, RK, Masterbike) you'll be looking at another chain in 10K miles.