Yoshimura RS4 Quiet Exhaust Mod CRF450l

After installing the Yoshimura RS4 exhaust and Vortex ECU on my CRF450l I've been enjoying the power but the extra noise of the RS4 was wearing on me a little. I wanted it quieter than stock but the sound I was getting was more than I wanted. After some experimenting I came up with a FREE way to quiet the exhaust down by 50% and still have tons of power.
#crf450l #yoshimura #RS4
Yoshimura Exhaust
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• CRF450L
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• CRF250L
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