Loudmouth Wash Cap

Loudmouth Wash Cap
Loudmouth Wash Cap


Description See Also: 10 Reviews 5 Questions Fitment Part Numbers
Item #LOM0004

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10 Reviews
4.0 out of 5 stars
5 Star   5 4 Star   4 3 Star   0 2 Star   1 1 Star   1
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All Reviews
Durability 5/5 Ease of Installation 5/5 Performance 5/5 Style 5/5
Love it!!!

Best set up ever!! Just washed my bike with this on. Super clean!

Loudmouth Wash Cap
Motoparty MotoSport Staff
Durability 5/5 Performance 5/5 Style 5/5
A little overpriced but still worth it.

So this is nothing fancy. Just a rubber cap to put over your LoudMouth intake when you wash the box out. Works great, easy to slip on, no stupid bolts to mes with and it seals out water 100%
Worth it for the convenience.

flaboy238 Verified Purchaser
Durability 2/5 Ease of Installation 2/5 Performance 1/5 Style 2/5
Looks cheap

this product feels cheap, looks cheap, and not to sure that its going to keep water out. not to impressed

Locko Verified Purchaser
Durability 3/5 Ease of Installation 4/5 Performance 5/5 Style 3/5
Just a rubber cap.

I would bet you could find this cap for a dollar if you knew where to go. It is floppier than I would have anticipated. It is simple but will do the job. you could probably fab something on your own rather than spend the $15. but if you don't want to think about or hassle then buy it. I haven't used it yet but would think that putting the hose clamp on during washing would be smart.

450xdad Verified Purchaser Top 50 Contributor
Durability 5/5 Ease of Installation 5/5 Performance 5/5 Style 5/5
Must have

If you have a loudmouth intake system this is a must have accessory. Makes it super convenient to keep a tidy airbox

Taco13 Verified Purchaser
New York
Durability 4/5 Ease of Installation 5/5 Performance 4/5 Style 4/5
Does the job

Dont expect anything fancy here. It does the job well. Fits tight enough that a clamp is not needed power washing the intake box.

2013crf450 Verified Purchaser
humboldt, ca
Durability 1/5 Ease of Installation 5/5 Performance 5/5 Style 1/5

not worth 15 bucks. why didn't it come with my loudmouth air filter system ???

Dpx209 Verified Purchaser
St Louis
Durability 4/5 Ease of Installation 5/5 Performance 4/5 Style 4/5

If you have the loudmouth intake, this is a must have. Just makes washing bike so easy.


So every time I clean my filter, which is every 2 rides, and I replace it every month, I'm always in disgust about how nasty the air-box is with mud and dirt. Some dry and some wet. Its such a pain to cover the hole with a dirty towel just so I can spray some cleaner all down in there and try to scrub it by hand & finger. Now I can just spray it out with a hi-powered hose!!! stays spotless!! I leave the cover on til it drys up enough to put the filter back on, crank the bike, and let the motor dry the rest!!! Awesome tool!!! Thanks, I tell my riding buddies about this!!! Good product, simple but works!

Clovis, Ca
Loudmouth for 07 CRF450R

Installation was slightly time consuming, but not difficult. I also bought the seal they sell and recommend using that vs silicone. After that, it does everything all the mags and people say it does. Easy filter changes and more power. I bought it simply for easier filter changes, the more power thing I have mixed feelings about. 1, yes more power is cool but 2, it cut 2 laps out of my motoing per session due to ARM pump caused by the power increase. It's a great product that actually works!

5 Questions
Answered:   5
Not Yet:   0
Location: Panama City Beach, FL, USA
Q: I bought this for my stock air box/ boot for a 2011 crf450 an doesnt appear to fit?
Over 3 years ago
MotoSport Staff
Over 3 years ago Location: Portland, OR, USA
A: Unfortunately this will not fit a stock airbox. As stated in the product description, it is designed for bikes equipped with the loudmouth intake system. We do have air box covers though that will fit your 2011 CRf450 with stock airbox. When ordering the airbox covers, please make sure to also profile your bike correctly as they are model specific.
Q: Where can i find a wash cap that fits a stock intake?
Over 4 years ago
MotoSport Staff
Over 4 years ago Location: Portland, OR, USA
A: If you can give us a call we are more than happy to try and help out. Unfortunately I cannot answer this here without knowing what model you need the wash cap for.
Q: Will not let me add to cart?
Over 4 years ago
I want to order this wash cap along with the loudmouth intake kit,but it wont let me add it cause it says it doesn't fit my bike?
MotoSport Staff
Over 4 years ago Location: Portland, OR, USA
A: We are currently adding applications to this product and some of the KTMs are still in the process. Since these wash caps come in two sizes (minibike and big bike for the most part) you could select another bike to add to your cart in the meantime. For example, the wash cap for a 2008 YZ450F would be the same for your 2013 KTM 250SX. If you have any questions on this please feel free to give us a call. 888-676-8853.
Q: Does this fit?
Over 4 years ago
If i order a loudmouth intake for a 2013 ktm 250sx 2-stroke,will this wash cap fit?
MotoSport Staff
Over 4 years ago Location: Portland, OR, USA
A: Yes, this would work with your Loudmouth Intake.
Over 4 years ago Location: New York
A: There is only 2 size wash caps. 150cc and up is all the same size.
Q: Will it fix a stock airbox?
Over 7 years ago
will this fit in a stock airbox for me to spray out the inside? the bike is a 2009 yz250f fully stock. thanks
MotoSport Staff Expert
Over 7 years ago Location: Portland, OR
A: This is designed specifically for all Loud Mouth intake systems.
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# Part Numbers
Product Variant Manufacturer Part #
Loudmouth Wash Cap CAP
Loudmouth Wash Cap N/A
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