I replaced the exhaust on my 2011 CBR125R (with CBR150R engine) recently. The stock exhaust was rusting and a friend welded it together in a spot where it started to leak near the flange a couple of years ago. I decided that I wanted a higher quality exhaust and my only requirements were that it be relatively quiet and well constructed, and I didn't want to have to re-pack the muffler every few years. I suppose I also didn't want to lose low-end power like my experience with other full exhausts in the past either. If it performed as well as stock - I'd be happy.
I had a musarri on my 250. To fix the backfiring I cut the end off of a colgate toothbrush and jammed in the hose on the side, problem solved.Haha! just saw this thread. I threw on a Masurri exhaust, cheap and pretty. Came out perfect, good looking and all.
I noticed some backfire if i shifted and kept the rpms higher than usual.. wasn't sure if it was really this or my head playing games... but I try and reproduce the sound whenever I shift.. it's dope!
My understanding is that the exhaust is pointing away from the direction you're travelling, so loud pipes are moot point.My BMW is loud as hell. Full Termignonl.With good reason. The avg Thai driver is in koo koo land when behind the wheel. If they don't see me. They will sure as hell hear me.
Not true. Sure it's louder behind the exhaust, but sound waves travel out in all directions. Unless you're traveling faster than the speed of sound, the noise will proceed you. You still hear trains coming, trucks approaching, and loud muscle cars even if you're not standing behind them.My understanding is that the exhaust is pointing away from the direction you're travelling, so loud pipes are moot point.
The CBR250 stock pipe is horrendous. Changing it increases horse power by 5 and a K&N filter gives it another 2. So now you have a real decent small sport bike that sounds bad ass and not like a fart and look like ****.For those of you that have yet to change the exhaust, I am going to throw my two cents in on the subject in this thread.
Leave the exhaust alone! You are making your bike look stupid, you are wasting money, and it is only a 250cc after all. It is not a Corvette. The only people that benefit when you upgrade your exhaust are the shareholders in the company that manufactured the exhaust and the website that sold it. The people that are losing out are, you, your family, your neighbors for having to listen to your stupid 250cc roaring like a rocket ship, your riding buddies, anyone that sees you on the street, your bike's next owner, yada yada yada...
- Our bikes are 250cc. They produce 23 hp or so, from what I have read. You risk turning your bike into a POS that backfires, produces too much noise, gets worse gas mileage, etc. all for perhaps a tiny tiny gain when you mess with the exhaust. Or, even worse, you get all of the above with no measurable gain.
- Honda designers engineered a very suitable exhaust system for this bike.
- Exhaust is more than just "opening it up so it can breathe." If this were not the case then the best exhaust mod would be to hack the thing off and leave it open.
- Exhaust scavenging improves engine efficiency, and scavenging comes from an ideal amount of exhaust restriction.
- Look at all the threads on this site about making aftermarket exhaust quieter. Most aftermarket exhausts, I will venture to say, add more NOISE increase than Horsepower.
- A loud exhaust does not make you safer, only more obnoxious. At moderate to higher speeds people behind you (i.e. those that see you) may hear you better... those in front, they still can't hear you.
- You may want to sell your bike someday. You may have to spend money to get it back to bone stock in order to entice a buyer willing to pay top dollar, or else you may have to sell it at a discount because its got a stupid fart can on the side of it. Many people looking at used bikes, myself included, would look at an aftermarket exhaust on this bike and think it is a big red flag not to buy the used bike in question. Save the money you'd spend on this exhaust and put it toward your next bike, if you aspire to a more powerful bike.
- Stock exhaust weighs 40 pounds? Okay, I will take peoples word for it that they weighed it on a scale. Aftermarket exhaust weighs 10 pounds? Okay, so the weight savings is 30 pounds. Why not just exercise more, get healthier yourself, and lose that 30 pounds from your belly instead of changing your exhaust? Put the $500 you'd spend on the exhaust towards weight watchers.