Pro Circuit Factory 304 Silencer - 2-Stroke

$134.95 - $229.99
$80.77 - $137.77
4.80 5 46
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 (46)
  • Q&A (35)
  • 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 (46)
4.8 out of 5 stars
5 star   39
4 star   9
3 star 0
2 star 0
1 star 0
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1-10 of 46
Overall 5 out of 5 stars
Ease of Installation
Performance
Power
Style
Verified Purchaser
Location: Geneva, Ohio
whiteline
Exactly as I expected...

Form, fit and finish is of a quality that I'd expect. I can't say anything bad for the silencer. It did just as I wanted, I was running a shorty silencer, but with my SXS 300 kit it was a little to punchy for my tastes. The longer silencer moved the powerband higher into the RPM range and the hit was a tad softer. It works for me.

Fitted on: 2009 KTM 250SX

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

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Total Questions (35)
Questions with answers:
  35
Questions without answers:
0
Ckan Location: Nc
tomm Location: South Lyon, MI 48178, USA
1-10 of 35
dietz 9 days 19 hours ago
Does it fit a 1995 rm 125?
Expert MotoSport Staff
9 days 19 hours ago
MotoSportExpert
Yes the Pro Circuit Factory 304 Silencer fits your 1995 Suzuki RM125. Just be sure to correctly select the Year/Make/Model of your bike before ordering so we can be sure to send you the correct silencer for your bike. Also, feel free to give us a call at 888-676-8853 and we would be happy to help you out with your order.
John 1 month 14 days ago
Will this silencer fit my 2005 Suzuki rm85?
MotoSport Staff Expert
1 month ago
MotoSportExpert
If it is available through one of our suppliers, we would be happy to order it for you. Please contact one of our sales professionals to inquire about special orders and availability.
Dirt Bike: 1-888-676-8853
Rider155 2 months 17 days ago
Will this silencer give me more top end or bottom end power and is it worth buying?
Expert MotoSport Staff
2 months 16 days ago
MotoSportExpert
The Pro Circuit Factory 304 Silencer Improves top-end power. The Pro Circuit R 304 Shorty Silencer offers added bottom end.
Rider155 2 months 21 days ago
Would these silencers fit correctly on a 2013 kx85 and would you need to change the jet setting or rejet also would it fit onto the stock pipe?
MotoSport Staff Expert
2 months 20 days ago
MotoSportExpert
Just be sure to correctly select the Year/Make/Model of your bike before ordering so we can be sure to send you the correct silencer for your bike. You should not need to re-jet when changing silencers. Also, feel free to give us a call at 888-676-8853 and we would be happy to help you out with your order.
Mohawkman2 1 year 2 months ago Location: Iowa
Weight?
What is the weight? 3.1pounds?
Expert MotoSport Staff
1 year 2 months ago
MotoSportExpert
Approximate weight of the Pro Circuit Factory 304 Silencer for your 2005 KDX200 is 2.8 pounds.
KTMRacer 1 year 2 months ago
Would this silencer fit an FMF gnarly fatty pipe?
MotoSport Staff Expert
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.
Ckan 1 year 8 months ago Location: Nc
Will this work with a fmf fatty gold?
Expert MotoSport Staff
1 year 8 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 2 years 1 month 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
2 years 1 month 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 2 years 4 months ago
Jetting for 2000kx250?
It s a 2000 kx 250 .Bryson power reeds.fatty pipe .304procircet silencer
MotoSport Staff
2 years 4 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 2 years 4 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
2 years 4 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.
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