wr - stock exhuast mods

what have some of you done to your stock wr exhaust, to make it flow better.

i have a new 450 coming, and it appears to be corked up just like the 400...426.

The only thing that you can do to the Stock Exhaust is pull the plug out......Thats it.

How would you know that the system need replacing or modification yet....The only thing anyone has seen so far is the concept bike...and only photos at that.

Be patient OB1....

Bonzai :)

i know guys that have made different inserts .

i have also heard of using a ttr250 baffle.

look at the pics on yamahas web site......same

corked up half inch hole.........

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