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WB E2 question 07'

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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?

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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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