Muffler pack for wr426 stock exhaust
Posted April 20, 2014 - 01:48 PM
Posted April 20, 2014 - 02:41 PM
Posted April 20, 2014 - 03:37 PM
Posted April 20, 2014 - 06:08 PM
Is there something like this picture in the end? If not, it will be very loud. With it, it's not as bad. They came with something we call a pea shooter. Very small and restrictive hole, everybody tossed it.
The stock muffler has some packing around a mechanical baffle, not something they designed to be repacked. You would have to cut it apart to repack it and weld it back together.
I have an 01 wr250f which uses the same muffler. I put an FMF megabomb and Q4 on it and it's quieter. That was louder than I would have liked and needed to be repacked too often. So I took out FMF's glass pack and welded in the stock baffle assembly from an 09 450. Much better.
Posted April 21, 2014 - 05:57 AM
I have a 2002 wr426 and made mine street legal. just like yours and too loud. I took out the spark arrester assemply (three bolts) and used steel wool to pack the whole inside. used a broom handle to compress it to the sides so that the spark arrestor assembly will fit back in. I have mine packed really tight and it has been working great for the past 4 years. You might have to adjust the carb because of the more restriction of the exhaust flow but it worked great for me. I used steel wool because I had some but you could just use muffler packing.
Posted April 21, 2014 - 09:02 AM