5-7k is about all you'll get out of the stock packing jardine provides, all I had left at 10k was the front 3 inches of packing.
Ive used FMF 4 stroke Dirt Bike packing before with good results.
And yes use STAINLESS STEEL rivets that are a good brand, not some **** brand at Ace Hardware thats cheap and will break like I had happen to me, I didn't get bucked 2 feet like Dave said, but it did kick my back tire over about 6 inches while I was slightly leaning in a curve.