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Discussion Starter · #1 · (Edited)
Not sure if this really counts as a how to.

I am really interested in a new exhaust but I am waiting for a domestic vendor and a belly style exhaust. Until that time comes around I have decided the best thing to do is to modify the stock exhaust.

Here is an imgur album with descriptions
Grom Exhaust Mod - Imgur

Final Product.





Here is a video of the first mod I did by drilling holes


Here is the final mod video with on board , drive by, dash facing drive angle and walk around.

 

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In your first pic if you look at the rear mounting bracket to the frame you will see a notch where it attaches to the muffler. If you cut right there (at the notch) all the way around without going to deep, the rear half will just slide off with the entire internal muffler and it just leaves a hollow can with some type of spark arrester thing inside. There will be 4 tabs protruding from your front piece (if you did not go to deep, ONLY cut through 1 layer of steel) that the rear section was slid on. Then you can rivet your stock exhaust tip directly to those internal tabs for a clean look.

Basically you will cut off that last plate that you left on.
Shaves about 5 pounds off the bike!
Also, wrap a piece of masking tape around the can so you have a guideline to keep it straight.
 

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Interested in the pictures. Was this discovered as an accident during cutting?
 

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Yep, total accident when cutting. I figured I did not need that whole bracket when I back halved it, so I cut at the notch. Accidentally cut through both layers in a few spots but oh well. BTW, added the Pro Armor badge to hide where I did a half-assed job grinding off the heat shield bracket. It sounds good now, not to loud or canny. Just a deep brrrrrrrrrrrrapp when you get on it. Similar to a full size dirt bike in sound. Performance upgrades? perhaps, but IDK. Seat of the pants it feels a little better in power, much better sounding to me, and it cuts about 5 pounds. When you weigh 220lbs a Jenny Craig quick 5 will definitely help.

Vehicle Auto part Personal protective equipment Auto part Auto part Muffler Auto part Vehicle brake Disc brake Brake Rotor Vehicle Auto part Vehicle Automotive exhaust Auto part Exhaust system Motor vehicle
 
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