Jetting ?
Hey I have a 2001 with an M4 Slip-on and stock air box and filter. I'm getting lots of popping/backfiring on de-acceleration. I have read lots about jetting for M4 full systems with after market filters and altered air boxes, but nothing for slip-on only. Is anyone running this set-up and have had the same problem ? If re-jetting is the answer should I do both or just the pilots ? is there anything else I should/could do ?.
Thanks
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