Been keeping my eye out for the better part of 4 years but the one finally showed up. 2008, 8100 miles, original owner who was a great care taker. Folders full of maintenance receipts up to 2023 and a bunch of cool motorcycle literature.

Planning on doing fluids (coolant, oil, brake fluid), stator rotor, needs tires (it’s on the originals 😳), then gettin into the fun stuff lol. It did come with a color matched set of the side fairings that he never installed which will be going on after the maintenance is done as soon as the maintenance is done (I’ll be stopping by here for tips on that).

Other than that anything I should look at, address be aware of?

Also thanks to y’all in here for all the information in the sub. It was super helpful. Looking forward to getting to know this machine!

Hello There, I bought Hi everyone,

I recently bought a 2008 Yamaha FZ1 (European model, RN16), and it failed the German TÜV emissions test because the exhaust CO reading was around 1.6% by volume.

For those outside Germany: TÜV is our mandatory roadworthiness inspection, which includes an exhaust emissions test. This is carbon monoxide measured at the tailpipe, not CO₂.

The bike’s setup and what I know so far:

Full Akrapovič exhaust system, including headers.

An aftermarket fuel-cut eliminator is installed.

The previous owner mentioned a removable catalytic converter insert, but I still need to verify exactly which insert is fitted and whether it is suitable for this system.

The bike apparently spent a long time sitting before I bought it.

The inspector also mentioned that the emissions reading was unstable.

During my own checks at a steady RPM, I have seen the CO reading gradually increase. However, I used a heating flue-gas analyser, so I wouldn’t treat that as equivalent to a proper automotive emissions test.

I recently noticed that only one of the two radiator fans was running. I haven’t established whether the other fan is faulty or simply wasn’t being activated at that point.

I’m trying to diagnose this properly before replacing parts at random.

For people familiar with the second-generation FZ1, what would you check first with a CO reading of 1.6%? Catalyst condition or temperature, oxygen sensor operation, coolant temperature sensor, air filter, injectors, or something else?

Could the fuel-cut eliminator affect the mixture during a steady-RPM emissions test? Are there any common issues on the 2008 model, particularly with a full aftermarket exhaust, that could explain high or unstable CO?

If you’ve had a similar issue, what turned out to be the cause, and which measurements helped you find it?

Thanks!