Hello My Yamaha R6 side setbacks silencer. Can you tell what the problem might be? I was at the beginning of BMC air filter, but i replaced it with the original. Can it be that fuel mixture is too rich, and how can I make fuel mixture weaker? Advance Thanks, Indrek

Sorry but your explination is not to good, The mixture cant be adjusted and probably wont need to be if your bike is in good order,has it been serviced recently ?. First fit new air filter allways original ,after-market ones ruin the mixture and wont make it go any faster.! Then carefully check the exhaust for leaks as this will cause backfire,poor response. I dont know if this helps so get in touch again with more details if not thanks. p.s check the air box is tight with no air leaks or holes drilled into it.