You got me thinking, so I weighed it. 8#11oz. What a fatty. Gained 5 oz. It was 8#2oz. with the Saito 100. Gained 4 oz. with the YS 110 and now the rebuild added 5 oz. With the rebuild came the 'Hatori' header. Not sure what that weighs, but it did displace the muffler and the threaded pipe to secure it. Its all the tails and spare parts that keep me coming back. I have too much stuff to not rebuild. I said it before, but here goes again, this is the last one!!!!! One thing that I did notice with the additional weight from the YS, it flew and handled better. We will see what the gain brings this time. I know that the YS won't notice. Later, Joe