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White Bros E series and jetting???Everyone needs a little help

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98 WR400 with stock head pipe and white Bros E series s bend. Jetting currently stock.

I have inserted the white bros quiet core insert and took it down to 7 disks to get it to pass the old sound test of 101 db's.

I originally ran 12 disks with and without the quite core and had no problems at all. By decreasing the disks will the jetting need to be change? Elevation is 2-3 thousand feet here in Nor Cal.

Anyone experimented with this, with or without the quite core. Seems to run okay but I have not run it long enough to know if any problems will occur.

Has anyone out there tried the quite core insert? Have not heard any comments on it.



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