Exhaust Down Pipes Question

[stet]

[quote author=YamFazFan link=topic=23730.msg275044#msg275044 date=1517697472]
Good info.

Did many other bikes of that era have the same set up for CO2 testing?.

Quite  a few including the Fazer 1000, Thundercat, ThunderAce, Fzr600, R6 Carb ver, YZF750R, R1 Carb ver, I am sure there were more, mostly late 90s early 2000s
[/quote]

The Yam FZS1000 service manual does list them as 'Emission Check Bolt' (4 of), but the Yam FZS600 service manual is not so specific, although it does list some exhaust bolts which probably have the same function.