03 crf450 exhaust questions

tnrider

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#1
i see many riding locations that require something no greater than 99db and spark arrestor (US forest service regs). will my stock 03 crf450 setup cut it? what mods are necessary - for little money and losing little performance
 
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#2
Originally posted by tnrider
i see many riding locations that require something no greater than 99db and spark arrestor (US forest service regs). will my stock 03 crf450 setup cut it
Unfortunately no, but there are easy ways to retain the stock setup and bolt on a well designed and affordable 96db S/A solution. Take a look at the Pro Moto Billet Silent Insert and spark Arrestors.

From their website :
This insert will reduct the noise level on your CRF 450, YZ 250F-450F to meet or beat the 96 db sound test.
Simply inserts into the nozzle and is held in with a bolt from the back side.
Available for all of our spark arrestors. Only $29.95


Here's a link to the insert ann their slick bolt on Spark Arrestors:
http://www.promotobillet.com/spark_arrestors.htm
 

jboomer

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#3
Looks like you have to buy the spark arrestor endcap ($119) then the silent insert ($29). About $150, but much cheaper than an aftermarket pipe.