I took the air pressure sensor from my 2013 and installed it on the lean running bike. What a difference. The bike runs great and the cooling fan does not come on as often.
There is no doubt that we have a bad sensor. However, in order to get some answers. This is what I have been doing the last couple of days .
1. I called Yamaha. I asked for an altitude to voltage chart or information for the air pressure sensor. After being shuffled around, I was told that it was only available to authorized dealers.
2. I called three large dealers in the area. Two wanted me to take to them. (Neither one seemed to have a clue of what I was asking.) One said he would check into it. He called back and stated “not available”.
3. I called SAE . They had nothing.
4. I called Delphi which manufactures sensors for automotive use. ( no luck)
5. A lot of computer research which produced nothing.
Now this could be an isolated problem or something we all should be aware of. I am aware that many are installing controllers to correct a part throttle lean condition. But this bike was extremely lean. There could be a fine line between the two conditions.
I am willing to make a Altitude versus voltage chart that we could refer to when we suspect an out of range condition. One tenth of a volt could mean the difference of a thousand feet in elevation.
All I ask is that when are servicing your bike, take the time to measure the sensor. Here is how—-
Set meter on voltage. Positive to pink wire. Negative to Black/blue wire. Turn key on. Do not start.
Supply me with voltage reading. Your altitude/elevation. Year , model and engine.
Thanks a bunch guys. As soon as I receive enough feedback, I will post a chart