Maintenance & Technical > KX250 / KX125

What have I done?

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KXcam22:
To tame the hit more you can put a reducer in the silencer outlet to restrict the exhaust.  For an experiment, try taping one in and going for a ride. Easy to do and test. Can be metal or plastic or even just a washer centered over the outlet. Cam.

98940:
You mean just stick something in the tail end of the exhaust?  :?

KXcam22:
Yes.  The yamaha PW50 came stock with a washer that went in the exhaust port to detune it for beginners.  You will effectively be doing the same thing except it is much easier to install and test (you wont have to remove the pipe).  I short 1" piece of thickwall pipe that slides tightly inside the silencer end would be fine.  Heck PVC or ABS would propably last fine. To start try to reduce the stinger pipe opening area to 50% of stock. Hope this helps. Cam.

js:
seems like they use to cut an 8 inch section out of a bicycle inner tube and strech it over the end of the tailpipe. Maybe that was the old homemade sparkarrestor?

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