Rebel 300 mufflers recommended
——————-
Summary:
My favorite mufflers for Rebel 300:
•stock,
•stock with cat drilled** out,
•Rebel 500 muffler.
… The second two sound identical. … [** You need a drill extension and a hole saw.]
—————————
Just my opinion, but I no longer recommend the A, B, or C stock muffler modifications (shortening muffler or drilling out exhaust tip) for the Rebel 300. They bring out the worst of the single cylinder sound – in my opinion the stock muffler has much better tone – and you can slightly increase the loudness by drilling 2 or 3 holes underneath the muffler at least four inches or 100 mm from the rear of the muffler. Also, if you remove the end cap, that will leave 3 holes (7/32″ or 6 mm) that add a little to the sound. I don’t know why, but my 300 sounds better with the fairing removed. With the stock muffler, the bike has a nice, unlike-a-single-cylinder sound around 4,000 rpm.
For a slightly different look, you can leave the end-cap off or paint it black (or another color) and put it back on. Also, you add metal trim to the side of the muffler – see photo.
———————-
Rebel 300 mufflers recommended
A Shorty GP baffle/catalyst added to the header pipe will improve the sound a little.
● M4 or Black Widow BG36R – With this, you are removing the catalytic converter 😦
● Arrow, Black Widow, LexTech, Scorpion, Miller, LeoVince with baffle, Musarri with baffle, TBR with baffle. – With this, you are removing the catalytic converter 😦
—————-
I no longer recommend the A, B, or C muffler mods for the Rebel 300. However, they will sound a little better with a Shorty GP baffle/catalyst added to the header pipe (see below).
● Shorten stock muffler – step A or B – With this, you keep the catalytic converter 🙂
● step C) Place a 35mm (1.375 inch) or38mm (1.5 inch) holesaw over the exhaust tip and drill out the rear of the stock muffler. Using pliers, pull out the exhaust tip. – With this, you keep the catalytic converter 🙂
The $15 Shorty GP baffle/catalyst – The Rebel 300 can use any muffler and still have a catalytic converter. You just add a $15 Shorty GP baffle/catalyst to the header pipe. How to install: it is a very tight fit so use a hammer to flatten it a small amount where the bolt fitting in. Then hammer it lightly into the header pipe. Only put it halfway in so it can be removed later. Put a 25mm long bolt about 40 mm up into the muffler inlet to “catch” the baffle in case it becomes dislodged. My guess is the $15 Shorty GP baffle/catalyst provides maybe 50 to 60% of the catalytic converter function compared to the stock one.
The factory cat weighs approximately 9.6 ounces (270 grams) – the Shorty catalyst weighs 2 ounces (57 grams). The factory cat fills the exhaust space, where the Shorty catalyst has about a 10% gap if you mount it in the muffler, which you could fix with a sleeve.
The Rebel 300 muffler inlet/front is 1 11/16 inch ID or 43 mm. The Shorty GP baffle/catalyst is 40 mm OD and 40 mm length. The 300 cat is 5.38″ 137 mm) from the end of the muffler, probably to keep heat away from the muffler joint – so if you put it in the muffler, I would mount the Shorty GP catalyst at least 4″ (100 mm) from the end of the muffler. Make sure that you fully tighten the mounting bolt before starting engine (otherwise catalyst could move further into muffler and become stuck.) The Shorty catalyst is 40 mm long, so there is plenty of room to add a second one if you want it to be quieter. You could also mount the shorty in the header pipe, as described above.
Rebel 300 comment:.
None of them. I like loud but they are all blisteringly loud. Removing the stock exhaust also removes the catalytic converter and it becomes so loud, that it will absolutely make you deaf, and even with hearing protection it will drive you mad.
But I like a good tone. After messing with some setups, stock exhaust debaffled is pretty loud, and has a lower tone than any aftermarket exhaust. Get a hole saw drill attachment at harbor freight, stack two of them together, and drill out the metal ring in between the actual exit pipe of the exhaust, and the ring that’s slightly larger. If you only want a little bit more sound, drill 3-5 holes in that metal ring instead of removing it.
Rebel500 