WB E2 question 07'

Just ordered one so I can be legal in the forest and wondering about any power gains or losses over the stock exhaust. Also I checked WB site and they only have jetting specs up to 05' which suggested to leave as stock. Anything opinions?

Run it with your current jetting. Chances are the only things you'll have to tweak is the fuel screw and maybe raise the needle 1 position.

I should be recieving an '07 YZ header and a '06-'07 YZ 450f WB E2 for my WR within a week. I'll probably have to bump the main up to a 168 (165 now)since the stock WR exhaust w/pmb insert is much more restrictive than an E2.

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