Start: i bought 1978 honda cb 500 which one was pretty lazy and it doesnt run very good, so first i found over 1 kg sugar from the tank and next i get the cylinder head out which shows that the timing was one tooth off, so i put the timing one tooth forward and i make sure that the timing was right i measure the camshafts notch interval which one was 4mm so then i put 2mm tight blastic thing on notch and cylinder heads surfaces between and thats how i make sure the timing is the right then i put it together and test drived it after this it isnt any so lazy but when i looked the cam chain tensioner i noticed that someone was broked the tensioners lock nut system and put in the hole some silicon. So story begins when i can get more pictures and sorry about bad english.