Track Day Winner
Join Date: Feb 2010
Location: Escondido, CA
Motorcycle: 2004 Suzuki GSXR600
Help-bike cut out while riding
I need some help with my GXSR, as it cut out unexpectedly tonight while riding. I have a K4 GSXR600 with about 20k miles on it. No exhaust or fuel system mods or upgrades. I bought it about six months ago and it’s performed flawlessly before tonight. I let it warm up and then started out at the good clip. I rode first gear to about 10k RPMs then up shifted as normal. I effed up on the gear shift a little, and didn’t shift all the way past neutral. The RPMs may have hit redline for a split second. It pulled strong for a good mile, and I had settled into my normal cruising speed of about 60mph. Then disaster, it felt like it was losing power and started bogging down. Since I was on an uphill stretch, I down shifted and applied throttle. The bike continued to lose power, and no amount of throttle would accelerate the bike. I pulled over on shut it completely off. After waiting a sec and starting it up again, it accelerated as normal for about thirty seconds, although the engine sounded louder and somehow harsh. After about thirty seconds, it began to lose power exactly as before and I pulled over to shut it off. After shutting it off the second time, I could not get it to run for longer than a few seconds. The lights and electronics work perfectly, and the fuel pump primes as normal. The engine turns over and starts easily, but then sputters and cuts out. Applying throttle can extend the run time, but eventually it shuts off. After pushing it a mile to a parking lot, I tried to start it again. It started strong and the engine sounded smooth and strong as normal. I revved it a couple times and began to think nothing was wrong with it. About a minute later the same thing happened; the tach fluctuated sporadically and then the engine cut out. I got a ride home and plan to go pick it up tomorrow. Since I’m relatively new to motorcycle maintenance, I literally have no idea where to start. Any help is appreciated.
Last edited by MSantini; 07-27-2010 at 04:27 AM.