Hi guys first time post. I have a 2001 cbr f4i with around 34,000 miles. My issue is every time I leave a stop light or am at a dead stop and take off in first gear it feels like the bike goes dead for a second kind of like a hiccup and then operates normally. Last month I did a new auto cct , OEM plugs ,fpr, and k&n air filter. At that time I had the stock pipe on the bike. I switched over to a cheap eBay dump pipe for a couple weeks and after being annoyed with how loud it was I put on a Dan moto jisu slip on last week. After the Dan moto pipe was installed for a week is when I noticed the hesitation. No fi light comes on. My only thought is maybe with running the aftermarket pipes I may have fouled the plugs out because I'm not running a lower commander?? Any input or advice would be appreciated before I tear everything back apart. Thank you in advanced!

 

ive got same exhaust on mine, and ive got the same problem with my bike. mine seems to only do it at high temps, doesnt want to idle and high temps either.. hope you find a solution because then i may have a solution for mine

 

Thanks at least I'm not the only one