So guys just an update I have changed all the belts more or less, the one the flail deck was the right one but it was ribbed like a cam belt, replaced with the correct v belt, also the bearing set inside the idler pulley was a little rough so I managed to drill the rivets out and split the pulley to replace the bearing which is ideal, the gearbox one seems to work well, had to adjust the clutch cable a little though, now the belt which goes from the engine to the deck is to long, I got what was said in the manual so may have to drop a size or two, the belt that was on it was fine in size so should I go and get the measured so I can get the right one? The rest of the pulleys you can’t remove the bearings so removed the pulleys took off the sealed bearing caps and cleaned and repacked with fresh grease it all sounds so much better when running now