Does anyone know the length and diameter of the swingarm pivot bolt/shaft on their 2004 YZ450F, or if it'll fit an '06 model? If not, would anyone be kind enough to go and measure theirs? If you thread some wire(or something thin enough) through the centre of the shaft to the other end and mark the spot at the starting end with a couple of fingers, you can then pull the wire out and measure how long the bolt is. The length needs to be about 245mm, and the diameter about 16mm I think. I realise this is not a very rewarding task, but I emailed the ebay seller two days ago regarding the size of the bolt and he hasn't responded yet. The auction ends in a couple of days.