Right after I got my tires replaced at the local Yamaha/Suzuki dealership, I puttered around for 50 miles, never getting over 6K RPM, to wear in the tires a bit. Towards the end of my ride the bike sputters and hesitates, and the FI light comes on and off. I am paranoid the dealership did something to my bike because I was riding on the same tank of gas the last few days with no issues, and I get my gas at the same place so I don't think it was bad gas. Just to be sure, I filled up with 92 octane (and some fuel injector cleaner) at another station and after 15 minutes of riding the next day, I get the sputter again. The next day it gets worse. After a 10 minutes it sputters and stalls. But it idles fine? Do you think puttering around fouled something? Is it foul play from the dealership?

I ride a 2002 F4i with a Two Brothers slip on. It only has 6200 miles and ran great up until the tires were replaced, with the exception of the rattling CCT. Thanks.

 

hard to say, mine was doing teh same thing, but new gas and injector cleaner fixed it. Is the FI light just on or is it blinking at all? That would be pretty shady of the dealership, did you call them?

 

The FI light comes on for a few seconds while the engine is stuttering. It doesn't flash on and off. I can't call the dealership and accuse them of anything without something a little more solid.

 

I asked a friend about this issue and he said it may be electrical, so I inspected the bike this weekend. No frayed wires, no loose connections. But I take the battery out every winter and I think I must have torqued the positive terminal too much because it was sticking up a bit. I hammeredthe terminal back into place on the battery and carefully connected the leads. I took it out for over two hours without a burp. Problem solved.