Pro Circuit Factory 304 Silencer - 2-Stroke

$134.99 - $229.99
$121.99 - $206.99
4.80 out of 5 stars
Fitment Expert:
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Pro Circuit Factory 304 Silencer - 2-Stroke
Pro Circuit Factory 304 Silencer - 2-Stroke
  • Description
  • Reviews (47)
  • Q&A (31)
  • Fitment

With a clear and stylish design, the 304 Silencer will make a lasting impression. The slightly longer body offers reduced noise output when compared to the R-304. Its perfectly constructed lightweight cylindrical canister, combined with the brushed aluminum body and stainless steel inlet tube and end cap, give you a silencer that looks as good as it performs and ensure that a truly unique riding experience is in store for you. The 304 silencer is recommended for most two-stroke applications.

  • Longer body design helps to reduce noise output.
  • 6061-T6 brushed aluminum silencer body.
  • Stainless steel end-cap.
  • TIG and MIG welded for strength and durability.
  • Double-walled mounting bracket(s).
  • Allen head screws ensure easy repacking when needed for extended product life.
  • Made in the U.S.A.
4.8 out of 5 stars (47)
4.8 out of 5 stars
5 star   38
4 star   9
3 star 0
2 star 0
1 star 0
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1-10 of 47
Overall 5 out of 5 stars
Durability
Ease of Installation
Performance
Power
Style
Verified Purchaser
Location: Michigan, USA
hondaguy
Good product

pro-circuit products have been on my race bikes for 20 years they hold up well look good and perform well . very happy with pro-circuit.

Overall 5 out of 5 stars
Durability
Ease of Installation
Performance
Power
Style
Location: Houston, TX, USA
Tomas
Pro Circuit 304

First silencer I ever bought that actually improved performance in conjunction with a pro circuit platinum 2 pipe. Power delivery better across the board. Buy it !

Overall 5 out of 5 stars
Durability
Ease of Installation
Performance
Power
Style
Top 50 Contributor Top 100 Contributor
Location: New York, NY, USA
peter
Rips

long live the 2 stroke! pipe rips and stays looking new for a while- cover it with WD-40 when you clean the bike.

Overall 5 out of 5 stars
Durability
Ease of Installation
Performance
Power
Style
Top 100 Contributor
MXWarrior
Good silencer for a 125

Was great paired with e Pro circuit spark arrest or, and was very good power booster, plus looks good on the bike, and seems to be okay durability, but not as good as FMF. By far one of the best power boosters in terms of 2 stroke pipes, I've ever used.

Overall 4 out of 5 stars
Durability
Ease of Installation
Performance
Power
Style
Location: Wellington, FL, USA
hayden
GREAT SILENCER!!!!!!!

I bought this silencer because it was rated really good and the price was great. It is not as loud as i was hoping on my kx 85 aboutthe same as stock but really makes a difference in power

Overall 5 out of 5 stars
Durability
Ease of Installation
Performance
Power
Style
Verified Purchaser
Location: Fernley, NV
LukeMX8
PC Factory 304 - 92' Noleen Yamaha YZ250

The 304 really lets all my horses out, top and bottom end show significant power increase. Had a spark arrest on before. Very snappy on the pipe, no back pressure lost. No change in spark plug wear. Hidden behind the number plate, very neat to the bike. SOUNDS SIKK!!!

Overall 5 out of 5 stars
Durability
Ease of Installation
Performance
Power
Style
Location: Chicago, IL
clazer
Best sounding banshee silencer

i bought these to pair with a set of shearer inframe drag pipes they fit like a glove and took the banshees crackling sound away and gave her a extraordinary exhaust note in between a 4 stroke and a chainsaw sounds like an angels soung to my ears.

Overall 5 out of 5 stars
Durability
Ease of Installation
Performance
Power
Style
Verified Purchaser
Location: muncy pa
beastandtheharlet

good silencer sounds awsome with the pro circuit works header

Overall 5 out of 5 stars
Durability
Ease of Installation
Performance
Power
Style
Verified Purchaser Top 250 Contributor
crazyspider84
Good Tip

Sound good and good price

Overall 5 out of 5 stars
Durability
Ease of Installation
Performance
Power
Style
Verified Purchaser
Location: new hampton , NY
longlivethe2stroke
Good purchase

it is noticeably quieter , but dose not take away any preformane, all around good pipe

1-10 of 47
Total Questions (31)
Questions with answers:
  31
Questions without answers:
0
hillbilly
1-10 of 31
Mohawkman2 Over 9 months ago Location: Iowa
Weight?
What is the weight? 3.1pounds?
Expert MotoSport Staff
Over 9 months ago
MotoSportExpert
Approximate weight of the Pro Circuit Factory 304 Silencer for your 2005 KDX200 is 2.8 pounds.
KTMRacer Over 9 months ago
Would this silencer fit an FMF gnarly fatty pipe?
MotoSport Staff Expert
Over 9 months ago
MotoSportExpert
Usually the aftermarket exhaust companies are compatible with the stock exhaust. This means typically you can mix and match for the two stroke exhaust. I can't give a certain answer without knowing more information like model, year, etc.
Ckan 1 year 3 months ago Location: Nc
Will this work with a fmf fatty gold?
Expert MotoSport Staff
1 year 2 months ago
MotoSportExpert
Usually the aftermarket exhaust companies are compatible with the stock exhaust. This means typically you can mix and match for the two stroke exhaust. I can't give a certain answer without knowing more information like model, year, etc.
tomm 1 year 8 months ago Location: South Lyon, MI 48178, USA
Does this silencer have a spark arrestor?
i need to know if this silencer is legal to use in the woods. Thank you
MotoSport Staff Expert
1 year 8 months ago Location: Portland, OR, USA
MotoSportRyanT
This silencer does not have a spark arrestor. I would recommend looking at the Pro Circuit Spark Arrestor Silencer or the FMF Turbine Core 2 for a silencer with a spark arrestor.
hillbilly 1 year 11 months ago
Jetting for 2000kx250?
It s a 2000 kx 250 .Bryson power reeds.fatty pipe .304procircet silencer
MotoSport Staff
1 year 11 months ago Location: Portland, OR, USA
MotoSportExpert
The jetting will vary based on your location and what elevation you ride at. For best results I would use Pro Circuits website and their jetting center for a baseline to start from, and jet accordingly from there for what elevation you are located at. Pro Circuit's jetting center can be found here : http://www.procircuit.com/jettingspecs.htm
Ryan66 1 year 11 months ago Location: Michigan, USA
If I put this on my 2012 YZ125 with a stock header will I have to Re-jet my bike?
If i put this pipe on my 2012 Yamaha YZ125 with a stock header, will i still have to re-jet my bike?
MotoSport Staff
1 year 11 months ago Location: Portland, OR, USA
MotoSportExpert
With just installing a silencer on your 2012 YZ125, you should not need to re-jet if the bike is currently jetted properly.
Roachy 1 year 11 months ago Location: Australia
Will a year 2000 Honda CR250 Pro Circuit Factory 304 Silencer 2-Stroke fit a 2007 CR250 ?
MotoSport Staff
1 year 11 months ago Location: Portland, OR, USA
MotoSportExpert
The silencers between the 2000 and 2007 CR250's are different and not interchangeable.
Dylan 2 years 1 month ago
What is the sound difference between the stock muffler and the pro Circuit Factory 304 Silencer - 2-Stroke?
MotoSport Staff
2 years 1 month ago Location: Portland, OR, USA
MotoSportExpert
For the most part they will sound very similar. If the stock silencer hasn't been repacked and is very loud and tinny sounding, then this will quiet it down some and give it a throaty sound back. A stock silencer that is properly packed, wont sound incredibly different than the Pro Circuit silencer on your 1995 CR80.
Jordan 2 years 2 months ago
Do I need a jet kit for the 304 if so which on and would it fit on my 89 yz80 with the stock header?
MotoSport Staff
2 years 2 months ago Location: Portland, OR, USA
MotoSportExpert
When replacing the stock silencer, you should not have re-jet your YZ80 . The jetting it is currently running with, as long as it is jetted correctly, should work just fine.
Carnell24 2 years 6 months ago
Kx125 cr125?
Will my pro circuit exhaust from my 2005 cr125 fit my 2004 kx125
MotoSport Staff
2 years 6 months ago Location: Portland, OR, USA
MotosportStaff
No, the two different models require their own silencer.
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