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2stroke yz250x noise at 5,000 rpm

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Hello all I've been trying to find this out for a while but i haven't been able. im trying to make a 2 stroke road legal but i can't find any easy way to see how much noise the yz250x puts out at 5,000 rpm the road rules say that it has to be below 95dba to be road legal in that aspect so just seeing if anyone knows.

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14 hours ago, Duncan Suttil said:

Hello all I've been trying to find this out for a while but i haven't been able. im trying to make a 2 stroke road legal but i can't find any easy way to see how much noise the yz250x puts out at 5,000 rpm the road rules say that it has to be below 95dba to be road legal in that aspect so just seeing if anyone knows.

Appears they possibly solved it here:

https://www.shopyamaha.com/product/details/gytr-by-fmf-turbinecore-2-exhaust-silencer?b=Cross+Country+Accessories&d=41|41&f=2019|253&ls=yamaha-motor-company

 

Edited by ar2stroke
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