Hello guys, recently upgraded my bike's exhaust to an aftermarket replica of Akrapovic. Total cost was 4000 inc fitting. Could someone please share some knowledge about tuning the AFR ? As i have heard that after installing an aftermarket free flow exhaust, you need to tune the AFR as well as upgrade the Air Filter. is this true ? i was thinking of upgrading the stock air filter to K&N BA 2012 which is specially designed for the 200 NS. Local store quoted Rs 4000



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