I have a 1986 fz 750 that when i bought the motor was in a million pieces when my crank mark is on the t where do i set the cams

Just restored a yammy and found wemoto site excellent. Just enter wemoto/yamaha or wemoto.com into search engine and go from there. Secondhand stuff is generally ebay or wrecking depots/warehouses.
Cheers.

hi,this might help,the way i do any engine is simply,rotate the engine untill no1 cylinder reaches top dead centre,the three marks on the crank will be(normally) 3deg before tdc, then tdc,then 3 deg after tdc.,so no1 to tdc,see whwt the marks line up on(normally the centre of the cdi pickup )then set the camshafts,these are normally marked to run on a level plane with the engine rocker cover,so 1 mark on the front cam normally points to the front of the engine on a level with the roker cover base and the rear cam mark normally points to the rear of the engine with the mark level with the rocker cover base,then you reinstall the cam chain and sprockets,keeping the front of the camchain tight (the rear of the chain will tighten after the tensioner is reinstalled)if you have a workshop manual follow that,as what i have said is general rule of thumb and it may vary slightly to the manual,hope this helps..,.cheers

3.0l or 3000mls

align the marks on the cams with the cylinder head and the mark on the magnito should also be lined up with the mark on the case

a good 10w40 oil..if you dont know what type was used before then i would flush the engine then put the new oil in