thanks grumpy the guy that gave it to me said it used to run in the right direction but couldn't remember what he changed on it many years ago. ive just had a closer look at the one in the link I think it has showed me whats different/missing on mine where the tensioner pulley bolts underneath on mine the brackets line up perfectly to install 2 idler pulleys vertically same as pic in link so the belts clear the deck and that will make the drive discs run in the right direction to solve forward/reverse issue and the bracket is there at the top of clutch discs to bolt on the tensioner where it is on all other models. is there a way I can find out what size tensioners I need to buy as they are missing? I will look into trying to find out more about its age/model etc it does look similar to the hd8. many thanks for your help much appreciated