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Thread: Exploding Airbox

  1. #1
    EBRforum Newb
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    Exploding Airbox

    I had a strange thing happen the other day.

    I was riding my 17 1190RX for about 70 miles. Stopped for lunch then headed across town to a gas station to put a bit more air into my front tire. After I filled up my tire I went to start up my bike and there was an explosion in the air box. It broke the two front mounts on the airbox cover and singed most of the hair on my foearm. I pulled the cover and airbox cover off right away to make sure that the bike was not on fire but there was just a bunch of smokecoming out.

    After a few minutes and looking it over without seeing any damage I attempted to start the bike with the cover off. It started right up and sounded just fine.

    Needing a ride home I decided to put the airbox and cover back on and rode home. I have not had any other issue, no weird sounds, or power delivery issues.

    I guess my question is what happened? Why did it happen and how can I fix and prevent this issue from happening again?

    Thank you guys for any help you provide!
    Also does anyone else own one of these bikes in Wyoming? I feel like I have the only one lol.

  2. #2
    EBRforum Expert EBRRider's Avatar
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    I would be checking the charcoal canister lines in the air box ,especially after you just filled up. There is a mode out you might consider doing. Mine is vented out of the air box.

    Click image for larger version. 

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  3. #3
    EBRforum ProvNov Rb70383's Avatar
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    I missed that mod. What exactly is done? Mine popped a few times, but never blew up.

  4. #4
    EBRforum Expert EBRRider's Avatar
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    Quote Originally Posted by Rb70383 View Post
    I missed that mod. What exactly is done? Mine popped a few times, but never blew up.
    By the Stark,
    Have a stutter?! Does it hesitate!?! Get weird vibrations while cruising....what about hard starts and stalling?! Well good luck with your issues.
    Been touching on this for a while now and had a theory, and did some testing. Seems the solenoid for the evap/fuel vent systems are cheap junk, and I’ve found 4 bad ones so far, in varying degrees of failure. This valve has a fairly large vacuum hose to the front cylinder ONLY, that goes into the charcoal canister, from there to the fuel tank. The valve is designed to pulse on and off to control the air flow/fuel vapor flow, as well as block it. Well these ****ers go BAD, sometimes a little, sometimes completely. The result, a massive vacuum leak... not air though, mostly fuel vapors travel from the tank into the engine. The front cylinder starts to correct and takes away a varying unreliable amount of fuel down to 50%ish, probably even liquid fuel on a full tank. This is slightly concerning. Now to ride.
    On the ride, while cruising saw approximately 10 inhg ( -5 psi) on the tank, had stumbles and hesitations, seems to lag when taking off. Under hard Decel I saw the tank go to 15 inhg on the gauge. The Vacuum doesn’t bleed off instantly either. Fuel pressure maintained, not surprising because of how the pressure is regulated but a vacuum on the fuel supply is a strain regardless. Bypassed the valve and blocked the vacuum line, cruised for a bit, much more responsive, takes off aggressive, good idle and no more stumbles.
    Theory, among other issues. This valve failure is causing massive fluctuations in fueling, especially during hard accel and decel where the ECM isn’t really doing anything, resulting in cylinders out of sync, doing different crap. Stressing the front weak ass cylinder and giving it that little push out the front.

  5. #5
    EBRforum ProvNov Rb70383's Avatar
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    Wow Thank you for the info. I totally missed this issue to check into.

  6. #6
    EBRforum Expert Cooter's Avatar
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    EBRRider convinced me to plug the vacuum line to mine as well. I left the electrical plug on and have had no issues at allNo CEL, nothing.

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