Workshop manuals for many of the engines that are fitted to Ballads can be downloaded from www.boten.nl-mottoren . There are different language editions and also owners handbooks and exploded diagrams of some. I hope this will be of use to you.
That URL did not work for me but http://motoren.ath.cx/motoren/index.php did and I was able to download a workshop manual, a parts book, and the owners manual for my motor which was really fantastic.
