Great replacement exhaust replacement tip. Less restrictive. More power than stock tip. Quieter than running without a tip. Neighbors will like it.
GYTR Performance Muffler Insert
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This muffler insert does quite well to quiet down your bike and compared to stock is indeed more free flowing. However, the way that this insert is made, it is only held in place by a single securing bolt. I am now on my second insert from GYTR because my first insert shot out of my exhaust at high speed and broke. The single bolt has a tendency to get loose as because the exhaust vibrates a lot, I tried lock tight and it just is not enough to secure the whole insert. After I lost my first insert I swore I would find a better way to secure it in my exhaust. What I did was go to the local Ace Hardware and get a bolt that was too long for the insert, that bolt extrudes into the path of the exhaust now, but I was able to get a nut on the inside and tighten it down as a locking nut. I used a plentiful amount of lock tight and then sealed the entire insert into my exhaust with high temp exhaust gasket also from Ace. This is the only way I have been able to keep it from rattling loose, and it has worked. I don't recommend this if you want to have a serviceable silencer (I will most likely never repack my muffler again). However, if you don't want to permanently seal off you exhaust you might have to buy a slip on silencer instead. It is a good inexpensive option to quiet down a straight piped bike or to get better flow compared to the stock baffle, just understand that it is going to shake loose if you don't take steps to seal it in.
My project WR426 came with a completely gutted stock YZ426 can on it that was just too loud for riding anywhere other than a closed course or private property. Weight and performance were not a concern, I just wanted an exhaust that wasn't so obnoxious, so I found a near-new stock exhaust and bolted that up along with a GYTR insert. Install is a snap: pull one bolt, remove factory baffle, install new insert and bolt it back together. The new insert looks sharp and is more attractive than the pea-shooter that came stock. Sound is slightly louder at idle, and a bit throatier under heavy acceleration, but is WAY quieter than my original setup. I found that jetting (which was spot on for the YZ can) was too rich and combined with the increased stock baffle's extra back pressure the bike refused to start. The GYTR insert is back to a one kick startup, no hiccups or bogging. YMMV.
Further testing is needed, and I'm looking for a decibel meter so I can get some accurate readings, but I'm not worried about passing a sound check now. I will update when I have more data, but so far I'm completely happy.
My bike didn't have a tip in it when I bought it and this thing fit the bill. Made the bike more tolerable to ride and even seemed to make it run a little better. The bike is a 99 TTR250 and this insert is for a WR but it fit fine with some slight modifications.
Although you will not get the power of a full aftermarket syastem. At one tenth the pricea great low cost alternative to a full system. Much more uncorked than the original spark arrester and a decent sound.
For some reason the hillbillies that I bought my bike from thought loud = fast and removed the guts from the pipe. I installed this in 2 minutes and its instantly quitter. I don't want to be the reason my favorite riding area gets shut down.
This silencer works great and really quieted down the exhaust on my 03 WR 450 but it comes without the bolt that retains it in the exhaust tip. If you have the bolt that goes to the stock silencer you're fine, if not you'll have to buy one separately.