Pro Circuit Factory 304 Silencer - 2-Stroke

Pro Circuit Factory 304 Silencer - 2-Stroke
Pro Circuit Factory 304 Silencer - 2-Stroke

$121.99 - $134.95

Description See Also: 51 Reviews 41 Questions Fitment
Item #PRC001D

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51 Reviews
4.8 out of 5 stars
5 Star   43 4 Star   10 3 Star   0 2 Star   0 1 Star   0
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All Reviews
Bjorns
Norway
Ease of Installation 5/5 Performance 4/5 Power 4/5 Style 5/5
Very good :)

Its a very good e exhaust :) its have a very hig sound
Its fit easily on my ktm 125. its the perfect shorty to ktm 125



Fitted on: ktm 125 exc 2014

Pro Circuit Factory 304 Silencer - 2-Stroke
worrthawg Verified Purchaser
central il
Durability 5/5 Ease of Installation 5/5 Performance 4/5 Power 4/5 Style 5/5
Good silencer

Smaller profile than stock. Maybe added some power but still working on finding the right jet combo for my riding style. Still fouling plugs like crazy. Actually had to go down in size on main and pilot jet and still have to go down. I ride mostly trails so its very low speed stuff maybe thats why. Sounds about the same but as the packing gets soaked in oil seems like its getting louder. Overall very happy. Has taken a beating getting dumped and has held up fine.

Tclaxton Verified Purchaser
Torrance
Durability 5/5 Ease of Installation 5/5 Performance 5/5 Power 5/5 Style 5/5
Great sound

Exhaust sounds awesome on my kx500. Could also feel a little more power in the bottom end!

Pro Circuit Factory 304 Silencer - 2-Stroke
whiteline Verified Purchaser
Geneva, Ohio
Ease of Installation 5/5 Performance 5/5 Power 5/5 Style 3/5
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

hondaguy Verified Purchaser
Michigan, USA
Durability 5/5 Ease of Installation 5/5 Performance 5/5 Power 5/5 Style 5/5
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.

Tomas
Houston, TX, USA
Durability 4/5 Ease of Installation 4/5 Performance 5/5 Power 5/5 Style 4/5
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 !

peter Top 50 Contributor
New York, NY, USA
Durability 5/5 Ease of Installation 5/5 Performance 5/5 Power 5/5 Style 5/5
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.

MXWarrior Top 100 Contributor
Durability 3/5 Ease of Installation 4/5 Performance 5/5 Power 5/5 Style 4/5
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.

hayden
Wellington, FL, USA
Durability 3/5 Ease of Installation 5/5 Performance 5/5 Power 5/5 Style 3/5
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

LukeMX8 Verified Purchaser
Fernley, NV
Durability 5/5 Ease of Installation 5/5 Performance 5/5 Power 5/5 Style 5/5
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!!!

Pro Circuit Factory 304 Silencer - 2-Stroke
Pro Circuit Factory 304 Silencer - 2-Stroke
clazer
Chicago, IL
Durability 5/5 Ease of Installation 5/5 Performance 5/5 Power 5/5 Style 5/5
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.

beastandtheharlet Verified Purchaser
muncy pa
Durability 5/5 Ease of Installation 5/5 Performance 5/5 Power 5/5 Style 5/5

good silencer sounds awsome with the pro circuit works header

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

Sound good and good price

longlivethe2stroke Verified Purchaser
new hampton , NY
Durability 4/5 Ease of Installation 4/5 Performance 5/5 Power 4/5 Style 5/5
Good purchase

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

KawasakiKX85
Shelby, NC
Pro circuit 304

This looks like its going to be a good silencer, it was a little hard to put on my 2007 kx 85 you have to force it some it was off a little bit. Havent got to ride it yet or start it up but im going to tommorw. But by hard to put on i mean you have to push real hard and it pushes the rubber muffler joint thing some and it goes back a little extra.

kx 85 with PC 304 silencer
kawasakiking1
Billerica MA
Durability 5/5 Ease of Installation 4/5 Performance 5/5 Power 5/5 Style 4/5
Great purchace, better sound, more power

this silincer was a great buy, it quieted my bike down a bit and made it sound awesome, and i didnt even need to rejet my kx 80, there was a major power increase throught low to high rpm's the only problem was that the silincer didnt fit in the stock position and it wouldn't let me put my side pannel on right, and i had to modify the side pannel to get the new silincer to fit in but it looks alright, the silincer didn't look like it does in the picture but whatever, overall a great buy

mxslick Top 250 Contributor
Hawthorne, CA
Durability 5/5 Ease of Installation 5/5 Performance 5/5 Power 5/5 Style 5/5
Super Silencer!!

Bought this with the Platinum Series Pipe for my 2000 YZ 250. It bolted right on, fit perfectly and performs great. I love the way this make s the bike sound! It is very easy to re-pack and the finish is durable. Big thumbs up!! See my review on the Platinum Series pipe for more...

hondacr
melrose, NY
Durability 5/5 Ease of Installation 5/5 Performance 4/5 Power 4/5 Style 5/5
Great buy

i would recamend this pipe 2 any one who likes power, i just put it om my 2006 cr85 and it ripes even more, great for trails and track i use it for both great buy.

Pro Circuit Factory 304 Silencer - 2-Stroke
0987654321
north bend washington
Durability 5/5 Ease of Installation 5/5 Performance 4/5 Power 5/5 Style 5/5
Best purchase ever

great

hondadude
raleigh, NC
Durability 5/5 Ease of Installation 5/5 Performance 5/5 Power 5/5 Style 5/5
Awesome

put it on a 03 ktm 125, sounds amazzzzing, and adds lots of top end, great pipe, for a great price

Pro Circuit Factory 304 Silencer - 2-Stroke
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41 Questions
Answered:   41
Not Yet:   0
Matt
Q: Fitment?
2 months 8 days ago
Will this silencer come with an end cap on my 2005 KX85 or will it be flat?
MotoSportExpert
MotoSport Staff Expert
2 months 7 days ago
A: On the Kawasaki KX80-85-100 1998-2016 and Suzuki RM100 2003-2005, it would be flat.
max12
Location: Houston, TX, USA
Q: Is there a spark arrestor on a 304?
Over 5 months ago
MotoSportExpert
Expert MotoSport Staff
Over 5 months ago
A: No the Pro Circuit Factory 304 Silencer would not have a spark arrestor.
Vintagerider
Q: Will this fit on my 1988 Cr125r Fmf gold series Header pipe?
Over 5 months ago
MotoSportExpert
MotoSport Staff Expert
3 months 26 days ago
A: Fitment between manufactures can not be guaranteed, however with that said you should not have an issue. 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.
DT12
Q: 304 or R-304 shorty?
Over 6 months ago
I ride mostly in the desert with a 2015 KTM 300 EXC and would like to know which you recommend? I realise the R-304 will improve bottom end and the 304 top end, but will the R-304 take off a lot of the top end power? Really like the sound the R-304 makes. The pipe is the standard OEM one. Thanks
Tclaxton
Over 5 months ago Location: Torrance ca
A: On my yz250 i could tell a big difference on the top end from the r304 and the 304. With the r304 my bike didnt rev out as high. So really just depends on how you ride your bike.
DRDRACING
Q: Is there a rubber sleeve that connects the silencer to the pipe or is it metal to metal fit?
Over 7 months ago
MotoSportExpert
Expert MotoSport Staff
Over 7 months ago
A: The rubber connector can be found in our OEM section for your bike here:
http://www.motosport.com/dirtbike/oem-parts/yamaha/2008/yz125/exhaust

Part# 4JY-14615-00-00
rory
Q: 1994 yz250?
Over 8 months ago
Will this fit my 1994 yz250 with an FMF Fatty expansion chamber?
MotoSportExpert
MotoSport Staff Expert
Over 8 months ago
A: Fitment can not be guaranteed with other manufactures although you should not have any issues. 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.
dietz
Q: Does it fit a 1995 rm 125?
Over 10 months ago
MotoSportExpert
Expert MotoSport Staff
Over 10 months ago
A: 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
Q: Will this silencer fit my 2005 Suzuki rm85?
Over 11 months ago
MotoSportExpert
MotoSport Staff Expert
Over 11 months ago
A: 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
Q: Will this silencer give me more top end or bottom end power and is it worth buying?
1 year ago
MotoSportExpert
Expert MotoSport Staff
1 year ago
A: The Pro Circuit Factory 304 Silencer Improves top-end power. The Pro Circuit R 304 Shorty Silencer offers added bottom end.
Rider155
Q: 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?
1 year ago
MotoSportExpert
MotoSport Staff Expert
1 year ago
A: 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.
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