Black Plastic Cap under Bike in the morning

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austrian_dude
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Black Plastic Cap under Bike in the morning

Postby austrian_dude » Fri Mar 16, 2018 10:06 am

I got a weird one and can't see where it is from.
I went for a ride yesterday afternoon and came back parking the bike in the garage when i noticed something underneath the bike.
It is a black cap which must have come loose somewhere as shown below.

Image

I got no idea what it is. The top of the cap says: Do not open High Pressure.

Anyone know ?

Image
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Any help appreciated and is it safe to ride ;-)

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Motogoon
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Re: Black Plastic Cap under Bike in the morning

Postby Motogoon » Fri Mar 16, 2018 11:12 am

Bottom of the rear shock reservoir I think, just covers the valve where the high pressure nitrogen is filled.

That's my guess anyway!

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Sarasota_Steve
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Re: Black Plastic Cap under Bike in the morning

Postby Sarasota_Steve » Fri Mar 16, 2018 11:57 am

Not the rear brake fluid reservoir cap that some members lost while riding?
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vernonbc
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Re: Black Plastic Cap under Bike in the morning

Postby vernonbc » Sat Mar 17, 2018 12:21 am

Motogoon wrote:Bottom of the rear shock reservoir I think, just covers the valve where the high pressure nitrogen is filled.

That's my guess anyway!


Yup that is exactly what it is. I just checked mine and it has the same message on it. It is about the size of a quarter.

austrian_dude
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Re: Black Plastic Cap under Bike in the morning

Postby austrian_dude » Sat Mar 17, 2018 1:42 am

Motogoon wrote:Bottom of the rear shock reservoir I think, just covers the valve where the high pressure nitrogen is filled.

That's my guess anyway!



Yep Motogoon. Thats it. Looked up the parts online and after some digging i found the part number and which was the rear shock and it fits perfect.

How the heck does that fall out though. Does that mean the rear shock is leaking and the pressure pushed it out ? If it would have come off riding i would have never noticed.

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Motogoon
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Re: Black Plastic Cap under Bike in the morning

Postby Motogoon » Wed Mar 21, 2018 4:49 pm

How did you go with this?
I would imagine if it's leaking enough nitrogen to blow that cap off your shock action would feel pretty terrible! If it feels ok maybe just put it back in and see how it goes.

SUPER DUKE #1
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Re: Black Plastic Cap under Bike in the morning

Postby SUPER DUKE #1 » Thu Mar 22, 2018 9:37 pm

First check the fit of the plug/cap, if it does fit tightly then it's possible there may have been some moisture from pressure washing or even condensation behind the cap that expanded from shock or exhaust heat (soak) and "popped" it loose?? I've seen and had spark plug caps pop off when the drain hole gets plugged on LC4's and RFS engines and the trapped water expands or even boils under the cap. Did you recently pressure wash your bike? The fit would be my first concern then moisture behind it.

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Willh
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Re: Black Plastic Cap under Bike in the morning

Postby Willh » Thu Mar 22, 2018 11:16 pm

Ahh, my air cooled duck, would find tiny little hockey pucks on the ground underneath it . I think we called it character. :lol:
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