I'm looking for some input on non-running ST4s. I just got back from a ride where the bike just quit on me. I attempted to start it once I got pulled over and it turns over well but just won't start. While cranking it seems to turn over faster when I open the throttle. The dash appears to work fine; the clock is operational, fuel gauge looks right, temp gauge is reading properly.
It seems like a fuel pump problem but I'm very worried that its the ECU. At this point I haven't been able to diagnose anything as its still at a dealer that picked it up for me.
Location: Greater Worcester Area, Massachusetts, USA
Could be the pump. We trouble-shot a stranger's ST4s at the Dragon a couple years back. Gent filled up, bike didn't start. No F.Pump noise...traced voltages all the way to under the tank connector. Finally slapped the tank while he turned the key on--pump came on, and he was a very happy camper!!
Try this home-cure-all: Shove a DUC between your legs.
Present DUC: 2003 ST4S Yellow! 2001 ST2 Blue
Past DUCs: 1998 ST2, 1981 500SL Pantah, 1985 MHR Mille, 1987 Paso Limited, 1995 916 mono
Other brands (past):
1978 BMW R100RS Motosport, 1978 R100S, 1981 Moto Guzzi V50 Monza, and a long list of Hondasakizukis
Thanks for the quick replys. I did just top off the tank 2-3 miles before it quit. I did stop at a bike shop for about 10 minutes between the fill up and having it quit. I was also in the tank this winter to replace the fuel filter so its certainly conceivable something came off in there.
I'll be sure to check all of that when I get it back home.