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Chrome expansion chamber significantly boosts acceleration, torque, and top speed. Customers praised it as "best upgrade for the money" with noticeable power gains. However, some reported quality issues with welds, fitment problems, and concerns about low back pressure. Sound varies—some found it loud like a dirt bike, others very quiet.
- Best upgrade for the money! Provided 5 extra mph and great throttle response.
- Really loved it, improved overall speed and felt huge increase in torque.
- Looks and sounds great. Fit perfect.
Definitely a upgrade!
Got it
absolutly a upgrade from the normal muffler gets to speed way faster than the normal muffler Mabye even a faster top speed
Doesnt create much back pressure.
It looks nothing like the picture the welds are horrible I’m very disappointed
Happy with product
Did not fit my bike
I like it. I'm ordering another one
LOOKS AND SOUNDS GREAT. FIT PERFECT
Best upgrade for the money! I bought this expansion chamber Last friday (10/4/18) and it arrived in a week. Excellent customer service and package tracking. This expansion chamber fit right on my bike (Only had to hammer a slight dent for the tip of my petal to clear it Use a cloth when doing this to avoid scratching the chrome). Over all provided my cheap costway 66cc engine with 5 extra mph, and gives the motor overall great throttle response and dont even get me started on the added torque+acceleration. Best $50 I could've spent on an upgrade. 10/10 would recommend, and i'll be getting another one when I buy my next motor kit. Also, it made my bike loud, so be cautious with your local law enforcement. I live in an area where the cops dont care, but generally the louder and faster you're bike, the more attention you draw. Sounds equivalent to a 2 stroke dirt bike. If you care, you can polish off the rough welds, but it looks better rough in my opinion.
Please get some faster shipping Got my pipe after my order got dalayed. A month after 5 phone calls it shipped great quality honestly but my luck the welds ant pretty in one spot on the manifold connection it leaks bad but I love the pipe
Exspanion pipe Nice pipe well made sturdy built good fit very little bending needed am satisfied, I would purchase from bike berry again
well made The chamber is well made and has a good protective plating on it.
10/10 would recommend again Really loved the expansion chamber, it improved my overall speed a lot and I felt a huge increase in torque, it sounds pretty loud though so you need to warn your neighbors. Overall a great expansion chamber
Good buy This is one of the best products I have gotten yet.Very noticeable increase in hp and torque.
Love it! This pipe Rocks - performance enhancement from low to high RPM.You may have to heat pipe up with propane torch and bend to fit your application however - best performance buy for the money.
sooo dammm DANKKKKK truely adds alot of power and top speed for me was 41mph:) worth every dollar
its great I have a grubeeskyhawk and put it on my bike its not all thatmuch quieter but the power increase is amazing it accelerates so much faster to me it even sits in a betterspot than the stock muffler
Nice! Didn't notice a variation in sound but I got notable increase in acceleration that I was seeking. Thanks again.
grate very very very quiet love this makes my bike very very very quiet
ive bougth alot of diff lil parts for my bike ive bougth alot of diff lil parts for my bike but this one gave me the biggest improvment. it changes the bike from sounding like a four stroke weedeater and tunes it to sound like a lil dirtbike and the power increase is another great thing highly recomanded
I am a custom motorized bike builder I am a custom motorized bike builder and have tried and made all kinds of the pipes out there and this one is not only quiet but performs very good through the whole power band. For the street this is the best pipe!
I have a 49cc engine. Will this chamber fit on it? If not can you suggest one?
Our Expansion Chambers are specifically designed for the 2 stroke 48cc engine and the 66/80cc engines.
When will these pipes be back in stock?
Our Expansion Chamber is now in stock and available for purchase.
will this( FH-EXPCHAMB-CRM) fit 49cc 2 stroke
Yes, our Expansion Chamber is compatible with a 49cc 2 stroke engine.
Does this expansion chamber have a way to quiet the exhaust such as internal baffling?
Our Expansion Chamber does not have an internal baffle or anything else that would quiet the exhaust.
What is the stud spacing spec for this muffler is it 30mm or 40mm
The stud spacing for our Expansion Chamber is 40mm
The Expansion Chamber enhances a 2-stroke engine's power output by expanding the volumetric efficiency. It also provides a boost in the top end speed as well as improving the use of the left over energy from the burnt exhaust exiting the cylinder. This helps aid the filling of the cylinder for the next cycle.