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Two installation options. Choose that option where the labeling is easy to read when installed. "Danger" "Never open when hot" Pressure Rating 1.1 ?? Take you cap to the dealer and have them pressure test it.

The 17 mm size offers an opportunity for over-wrenching. 1/4 inch drive sockets max out at 13 mm. So you're going to use a 3/8 inch drive socket. If you're using a 1/4 drive socket or a short box-end wrench you're probably not going to damage the threads. Might have been better if they had...

Yamaha is first and foremost a marketing company in the recreation industry. They're into bells and whistles they can sell. As we know their product debugging is not always as good. Fortunately they usually get the big things right.

They may have removed the coolant when they swapped throttle body assemblies. It wasn't necessary but they may have done it in error. The service manuals for earlier FJRs (before '13) include "drain the coolant" when removing the throttle body assembly. Engine coolant was an input for the wax...

On the Gen 1 the high temp blinking indication begins at 248 deg F. The fan starts at 221 deg F. I'd imagine the temp rises a bit more before the fan has an effect but I don't believe the temp ever exceeds 230 deg F with the fan on. You mentioned that the level has dropped in the reservoir...

Seems like the coolant flow rate is too low. The two obvious devices which can affect flow are the thermostat and the water pump. The thermostat should be fully closed until the temp rises to 160 deg F. As the temp rises the thermostatic valve opens more until it's fully open at 185 deg F...

I could be wrong but I don't believe coolant can move from the expansion tank back to the radiator if the radiator cap isn't installed correctly. There won't be a vacuum to move the fluid back. You can probably verify if the cap is installed correctly by simply running the engine until the...

You could add a "bubbler" tube to your coolant reservoir to help you see the level. Get a 1 foot piece of small diameter vinyl tubing. Drill a hole in the top of the reservoir slightly smaller than the outside diameter of the tubing. Push the end of the tubing down to the bottom rear corner...

The hose from the radiator goes to the lower connection on the wax motor.

Did they return it with a full tank of gas too?

I'd guess somebody topped off the coolant in the expansion tank and they overfilled it. The coolant was likely hottest during your stop-and-go near the end of your ride. Its volume increased the most during your stop-and-go and moved to the expansion tank. If the tank was overfilled there was...

In my opinion the CPU software should block the fan until the engine starts. Same goes for the headlights. Any significant electrical load should be blocked until the engine starts. Yet the bike doesn't have to sit very long after a hot shutdown for the coolant temp to drop below four bars on...

This part "should" be available from any Yamaha dealer. I say this because of its mention in the Owner's Manual. From page 6-7 of my manual: NOTE: (at the end of the Periodic Maintenance and Minor Repair chart.) -- Hydraulic brake and clutch systems "Replace the oil seals on the inner...

Given: When the camshafts are positioned correctly, timed properly relative to each other, the sprocket teeth are mirror images. If you look at where the sprockets are closest to each other at their centerline you'll see that the location of the teeth are identical for both sprockets. You...

One could perform an experiment by modifying the TPS circuit. I believe the TPS is a 5 K ohm variable resistor. A basic 0 to 5 volt voltage divider circuit. One could add an external 2 K ohm resistor in series with the circuit. Divide 5 volts across 7 K ohms. You'd have to adjust the idle...

Does the throttle servo have a built-in position indicator which sends info back to the computer? How many external wires connect to the servo? It's probably not the accelerator sensor simply because the problem occurs while in cruise too. In cruise the accelerator sensor remains at the...

I've noticed on many of the Yamaha liquid-cooled bikes that they've included an oil to coolant heat exchanger. Don't know if that's a premium feature or if it allows for less oil and an oil pan with less surface area and reduced air cooling? Many of the Kawasaki bikes don't have oil coolers...

Are the headlights on (may be quite dim) when you see the high beam indicator? Obviously they shouldn't be on until the engine has started. The horn and windshield control share a ground return path. I'd look at the headlight return path and its associated grounding junction. Headlights are...

If you suspect that the fluid has boiled you can always check if the calipers are very, very hot. That's where any boiling will occur -- where heat is generated. You can also check if the brake pedal is moving freely. I wonder if the cruise control will engage if the brake pedal is down at...

This video describes the troubleshooting of the throttle by wire system. At the 2:40 mark of the video you can see the tech opening the throttle valves with the linkage from the throttle grip/cable assembly. Also at the 4:38 mark you can see how the servo motor can move the linkage between...