I have a 10 year old fuel injected (2000) RK Classic. It seems to pop and backfire on decel. I recall seeing somewhere in the community that some one replaced their fuel filter and that eliminated the popping. I have researched and searched and can't seem to locate it. I have fuel injuction, K&N filter with screaming eagle slip ons. If I need to change the fuel filter is it real complicated? I checked the manual and can't get a good read on it. I have fat stiff fingers. Any help or advice is appreciated.