BMW uses a very restrictive snorkel system that works okay with not allowing too much water into the intake, but at the same time, it does not exactly allow the engine to get plenty of air. Instead of removing the snorkel entirely (I've seen some users do just that) - we have a plenty of rain days here - I decided to open it up a little.
After removing the countless fasteners that hold the plastics on top of the faux tank, I inspected the air intake for dust - the reason behind it was to find a spot that receives no (or almost no) splashes. The obvious choice was the top of the snorkel just above the intake opening, and the flat part that faces the battery. Earlier today, I stopped at a hardware store and picked up a few of one inch snap-in bushings. Armed with a hole saw of the right diameter, I made three holes in the snorkel.
With the holes cleaned up, I scuffed the outside a little to provide some additional grip for the glue I planned to use, and then I got my supplies ready: Snap-in bushings AND some fiberglass screen (to prevent any unwanted entry into the airbox - bugs, debris...)
I then simply laid the screen over the holes and pushed the bushings into it. The bushings themselves provided enough tension to hold the screen in place, but I wanted some added security, so after trimming the screen, I ran a bead of glue around the bushings.
Now the airbox has almost double the intake surface area vs stock.
4 comments:
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Was this mod a improvement? Recently rode in a parade and the red "tank" got so freaking hot. The bike didn't over heat. Improvement?
Please advise.
Have you noticed a big improvement with this mod???
KD, yes, I did notice an improvement in mid range response. The bike runs a bit smoother. The first twenty miles or so were horrible, but once the ECU relearned itself, it came back to life stronger than before.
Keep in mind that I also run an aftermarket pipe (GPR, there is a post here somewhere). The pipe keeps things much cooler due to unrestricted air flow. With the CAT gone, the exhaust runs cool enough to touch it after a ride.
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