Pro Circuit4-Stroke Exhaust Plug

Fit well solid quality.

I assume that this plug was specifically designed for use with a Pro Circuit muffler. I had to cut a notch out of one of the rings about 3/4 the way up to get it to stay in place on an FMF muffler on a new KTM. If you have the same problem, take a pair of wire cutters and mark the circle that holds it in place and clip several cuts into that one ring and it will give. Needs a redesign, or softer material. I tried it on 3 different mufflers, different bikes and it would fall out. Now it's just good for the one bike.

Works great for mt 06 kx450

Fits great into my ti6 exhaust. Just the pro circuit ribbon on it seems to be chinsey

Plug fit perfect on my 2012 Kawasaki 250r plug worked greet for washing and keeping wasps out in storage

Totally didn't think about diameter.. guess it's a don't ask, don't tell policy. These are, AT BEST, a size SMALL... and the pro circuit label, is a flimsy thin piece of paper that tears/comes apart the minute it gets wet.. if you happen to need a size small plug, great, go for it

Use it all the time while washing/storing my bikes. I use it in both 2 and 4 strokes. Love it!

Works just fine. Little pricy for a sticking on a butt plug, but it gets the job done. O; & my bike likes it too.