What aftermarket exhaust did you all get?

[butthead]

just out of interest which years had 6 mm header bolts and which had the 8 mm ?


need to remove mine at some point to do sump pan

[bandit]

All years had 6 mm studs & nuts.

[butthead]

[/size]
ah right so looking at darsi's post, must have meant after the fzs600 era , 8 mm studs and nuts ?



After chatting with my mechanic at the time he said that Yamaha realized that the 6mm studs were causing issues so with later bikes they made them 8mm, but i think it's just where they are taking the brunt of the elements combined with the hot/cold scenario that it's still inevitable that people will have problems dismantling them if they're left untouched for a long time.[/size]In hindsight it would make perfect sense to undo the the header nuts once or twice a year to clean and grease them up to avoid any trouble, but obviously that is not normal behaviour to most people.The 8mm studs still seize too as well, but probably don't shear so easily as the 6mm ones.

[bandit]

ah right so looking at darsi's post, must have meant after the fzs600 era , 8 mm studs and nuts ?



After chatting with my mechanic at the time he said that Yamaha realized that the 6mm studs were causing issues so with later bikes they made them 8mm, but i think it's just where they are taking the brunt of the elements combined with the hot/cold scenario that it's still inevitable that people will have problems dismantling them if they're left untouched for a long time.In hindsight it would make perfect sense to undo the the header nuts once or twice a year to clean and grease them up to avoid any trouble, but obviously that is not normal behaviour to most people.The 8mm studs still seize too as well, but probably don't shear so easily as the 6mm ones.

If Yamaha did change them to 8 mm then they didn't change the studs / nuts or cylinder head part numbers on their parts system for the FZS600.