BikeMaster Rubber Muffler Plug

BikeMaster Rubber Muffler Plug
BikeMaster Rubber Muffler Plug

$4.19 - $5.18

Description See Also: 26 Reviews 8 Questions Part Numbers
Item #BMS007E

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26 Reviews
4.5 out of 5 stars
5 Star   22 4 Star   5 3 Star   2 2 Star   2 1 Star   0
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All Reviews
Bubba Verified Purchaser
Seattle wa
To hard

They are to hard so they don't stay in the exhaust

Oldguy Verified Purchaser
Great fit

Perfect for Ride Red CRF,s Duel exhaust

Atlanta, GA, USA
By the small for 2 stroke and large for 4 stroke

As the title says and also if you have a spark arrestor you will need to trim off some in order for it to work but that is easily done with scissors or knife. works as advertised.

Ryan Verified Purchaser
Good for 2 strokes

Fits a yz250 pro circuit silencer well. I think it would
Fit most 2 stroke mufflers.

Kidkodi Verified Purchaser
Does the job!

I have a 06 crf 250r and 06 crf 250x and the small size fits both!

Pgines Verified Purchaser
It Works!

It works and inexpensive- what else do you want.

KRUSHER Top 250 Contributor Verified Purchaser
Oregon, USA
Large fit DR D flawlessly

YZ450F 2007 with DR D exhaust, this plug fits as good as you could hope for. The drive to get to my favorite riding place is like doing the baja 1000 lol, road is more rugged than the advanced trails ha. But this plug doesn't budge and keeps a serious seal.

BikeMaster Rubber Muffler Plug
Muffler plug

Not bad the small size fits a Honda cr 85 perfectly.

Jooton Verified Purchaser
Works great

Did its job.

primo05 Verified Purchaser
Wichita, KS, USA
Great product!

Good sturdy quality exhaust plug.

jamie Top 250 Contributor Verified Purchaser
Parker, CO, USA
Works just fine

purchased a couple newer 85cc 2 stroke dirt bikes and just didn't anticipate having a problem getting some wash plugs to fit from our local dealer. they sell a one size fits all plug.. lol they were almost as big around as our whole silencer.. so i purchased a couple of these and they work just fine, and the price is perfect for em.

rcvstro Verified Purchaser
Didn't fit, but...

I purchased the large (which states it fits most 4-stroke applications) muffler plug for my stock four-stroke 2002 Raptor 660R and it didn't fit. I then contact a MotoSport representative about my issue and they told me they'll send me a smaller muffler plug for NO charge. Amazing customer service. Thank you guys once again at MotoSport!

bhat811 Verified Purchaser
Plug Perfect

Bought two of the small size, they fit my stock KTM four stroke muffler as well as my FMF muffler on my two stroke. Nice, cheap and get the job done.

snake Verified Purchaser
Did not fit 2002 ktm 250 exc race four stroke

this plug did not fit in exhaust pipe . it would be helpful to have the dimension of this plug in the description so one could measure there exhaust before ordering

JasonH Verified Purchaser
Does the Job

The small fits nicely for the KTM 85sx, it does what it's suppose to.

BikeMaster Rubber Muffler Plug
solisj15 Verified Purchaser
Touchet, WA
Nice to have when washing bike

Fits in perfect in my pro circuit four stroke exhaust. Can wash my bike with out having to worry about getting water in the exhaust. Just remember to take it out before trying to fire up the

Lakerider Verified Purchaser
Comanche, tx
Exactly what the doctor ordered

I have a 2000 Yamaha XVS650 with Cobra exhaust and the large plugs fit great. I also have a 2007 Honda VT1100C with stock exhaust and the small plugs fit this bike great. Where I live at the lake we always have problems with dirt dauber wasps that build nests everywhere. At least they won't be building nests in my exhausts.

SD25 Verified Purchaser
Please Include Actual Measurements in Description

The sizing on this item is incorrect, or at the least, lacking in any relevant detail. "Small fits most 2-stroke applications, Large fits most 4-stroke applications." That's it. I have a Suzuki DRZ-400S which I would consider a fairly common 4-stroke. The "large" plug is much, much too big for the stock exhaust.

For what it's worth, the plug starts at approximately 1 5/16" (33mm) and ends at 2 3/8" (61mm)

Unfortunately, it's not worth the cost of shipping to return.

Hondan02 Verified Purchaser

Small size is perfect for a 2 stroke exhaust

Drift10 Verified Purchaser
Kinston ,NC
Getting it Done

Does exactly what it is intended to do.

See 6 More Reviews
8 Questions
Answered:   8
Not Yet:   0
Q: Would th small or large fit my Kawasaki 140L?
Over 5 months ago
MotoSport Staff Expert
4 months 29 days ago
A: Small would be best for the Kawasaki 140L.
Location: Haiti
Q: I have barker exhaust on a kfx450r will the large fit? The opening is rather oval shaped.?
1 year 1 month ago
Expert MotoSport Staff
1 year 1 month ago
A: Unfortunately we do not have a list of exhaust outlet diameters. I suggest measuring your muffler outlet and comparing to the plug sizing.

Minimum diameter of 14.75 mm / maximum diameter of 37.75 mm.

Minimum diameter of 33 mm / maximum diameter of 61 mm.
Q: What is wrong with my exhaust/Dirt Bike?
1 year 10 months ago
I had just bought this product about two weeks ago and place it in my exhaust when I am not riding. I went to ride my dirt bike and when I started it took about 7-10 tries to start it up. It usually does this, but it is probably me because I am still kinda learning how to start it properly with giving just enough throttle. After 5 seconds of it running I see smoke coming from between the engine and the Fatty Pipe. So I turn it off right away and see I still have my muffler plugged in. I have a 1997 Honda CR125 2-Stroke and I am used to it smoking a little because it's a 2-Stroke, but now it's smoking a lot. It also leaks exhaust oil between the Engine and the Fatty Pipe, and also between the Fatty Pipe and the Muffler. I rode it a little on our property and realized it has lost a lot of power now and it shuts off when I hold in the clutch to brake. What is wrong and what would I need to do to fix these two problems?
MotoSport Staff Expert
1 year 10 months ago
A: It sounds like your 1997 Honda CR125 is running rich. I would check your jetting and fuel pre mix ratio. Pull the spark plug out and see how it looks. How many hours are on the top end of your CR125? Feel free to give us a call at 888-676-8853 and we would be happy to help you out with your order.
1 year 7 months ago Location: Hunt, NY 14846, USA
A: I can't tell you exactly what the problem is. But if I were you, I would go find a near by magazine rack and pick up a copy of ATV rider and look for the section called (ask Mikey). Several people send him questions about mechanical issues with their machines and he has a very good reputation for giving good advice on making repairs. You are probably not the first person to have that happen to that particular bike. Hope that this is helpful. Good luck!
Q: What size would fit on the Honda CB300F ?
2 years 6 months ago
Top 1 Contributor
2 years 6 months ago
A: The CB300F is a 4 stroke engine, thus select the 4 stroke plug. It will fit best for your machine.
Q: Will the plug fit my 03 kx 125 pro circuit platinum silencer?
2 years 12 months ago
MotoSport Staff Expert Top 1 Contributor
2 years 12 months ago
A: Yes, you will want to go with the size Small BikeMaster Rubber Muffler Plug for your 2003 Kawasaki KX125.
Top 250 Contributor Top 500 Contributor Top 1000 Contributor
1 year 1 month ago Location: Oregon, USA
A: I can't promise it will but I'd bet on it. Mine is a large for a yz450f with Dr D exhaust and it fits it like it was made for it, and they have quite a lot of notches to be very universal
Q: Which one?
Over 3 years ago
I have a 2014 crf250r with the dual exhaust. The holes on it I believe are smaller than a single exhaust. Should I get the big muffler plug or the small one?
Expert Top 1 Contributor MotoSport Staff
Over 3 years ago
A: For your 2014 Honda CRF250R with the dual exhaust you can go with the large but may have to trim to fit so I would recommend going with the small.
Location: Michigan, USA
Q: It doesn't seem like it seals my stock YZ125 exhaust. It wiggles around. Is that normal?
Over 3 years ago
When i put the plug in my 2012 Yamaha YZ125 stock exhaust it seems like it goes half way in but yet I can still wiggle it around alot. Is that how its suppose to be or is it not sealing properly?
Expert MotoSport Staff
Over 3 years ago Location: Portland, OR, USA
A: For that Yamaha YZ125 you should be using the Small Sized muffler plug. Yes because of the way the plug is made you are going to be able to move it around when it is in the muffler. If the plug is inserted as far as it can go the "ridges" on the plug should seal out any water or debris when washing your bike.
Top 1000 Contributor Top 500 Contributor Top 250 Contributor
1 year 1 month ago Location: Oregon, USA
A: You need to twist it as you push it in or it won't go in as far as it should, just twist and push. You'll know once it seals because it won't budge. At least mine doesnt, same to get it out, twist and pull
Location: Esterhazy, SK S0A, Canada
Q: Would the small fit a procircuit r304 silencer the fmf does not??
Over 4 years ago
MotoSport Staff
Over 4 years ago Location: Portland, OR, USA
A: The small is designed for 2 stroke silencers so it will fit your Pro Circuit R304 no problem.
Top 500 Contributor Top 1000 Contributor Top 250 Contributor
1 year 3 months ago Location: Parker, CO, USA
A: yes, that is the brand of silencer we bought this plug for. as long as it's a 2 stroke application of course
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# Part Numbers
Product Variant Manufacturer Part #
Large FHM028L
Small FHM028S
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