Airbox mod

[Matukas]

Hello ST community! Thanks for sharing your experience!

I’m getting to know my ST. 2014 PD01
1. ECU “refresh” - changed a lot, motor runs quieter, smoother, no complaints staying above 4 k rpm. Before remapping, was gladly below 4k rpm. The drive mode T is fine and relaxing, in city no huge difference from single 650 ,
but S = smile mode, leaves no wishes, I know what I paid for
2. Air filter was quite dirty, >30kkm.So, installed new DNA filter, because of larger surface. And “found” easy mod on Airbox, easy to remove that inlet cover, that has 90deg angle to make suction port, that is covered heavily with hoses and cables.
3. Headers will stay OEM meanwhile, cat is “running away” and stock exhaust will have some relief in running channels..
4. Fork rebuild did by myself, thanks manual and YouTube help, bike had 65 kkm but nowhere mentioning in books (complete Yamaha service history) any intervention or oil change in forks. Well, to my surprise all bushings and gaskets were perfect, although oil was not clean anymore and showing some “silver” from the bottom.
5. Spark plugs… all original, just 8kkm but none of them had the caps for contact …
6. Looking for rear shock “service” upgrades, but not willing to spend 700-1200€.. any luck or measurable difference upgrading to ES version, as it looks with external expansion tank?

 

[TenereGUY]

If you never take this off pavement or are in rainy conditions on gravel/dirt roads then removing the 90° elbow probably won't matter. After being in rainy conditions and muck I found dried mud splattering on the intake. They didn't make it past the inlet with its 90° bend. It is there to remove water from the air stream because the water cannot make the bend so it hits the side and drains out instead of getting the filter wet.

 

[Matukas]

If you never take this off pavement or are in rainy conditions on gravel/dirt roads then removing the 90° elbow probably won't matter. After being in rainy conditions and muck I found dried mud splattering on the intake. They didn't make it past the inlet with its 90° bend. It is there to remove water from the air stream because the water cannot make the bend so it hits the side and drains out instead of getting the filter wet.
[/QUOTE
Thank you for alert. I was wondering about it, but as I’m going to make some protection for reducing water content on coils, the shield should work for air intake as well.

 

[Sierra1]

Regardless of how big air inlets are, the bike will only flow what the throttle body opening can handle.

 

[Matukas]

Agree, Sierra1, that's why it can't be to much...

 

[Jlq1969]

We all know that with the motorcycle stopped or driving in the city, the intake air sensor shows a couple of degrees more than the ambient temperature. If you install a TPMS with a temperature sensor, you can see why the front wheel TPMS reads approximately the ambient temperature, while the intake sensor reads more degrees. “But”, driving at half speed and for some aerodynamic reason, the intake sensor practically marks the ambient temperature (the same as the front wheel)... That would have to be verified, that when removing the 90° curve of the filter box , do not affect the aerodynamics and the engine begins to suck hot air from the engine