Want this question answered?
YES u can!
look at the following link, http://wiki.gstwins.com/index.php?n=Maintenance.EngineOil
thats an easy one. i had the same problem with my gs500e. its the violtage regultor. definatly
* TS50X * TS125R * GT Series * T series * GS Series * GS500E/F * GSX Series * GSX-R Series * RF Series * GSX-F / Katana Series * GSF / Bandit Series * VL 1500 Intruder LC / Boulevard C90 * VZ 800 Marauder / Boulevard M50 * VL 800 Volusia / Boulevard C50 * VX 800 * SV650(S) * SV1000(S) * SW-1 * TL1000R * TL1000S * RC80 * RC100 * RG150/RGV150 * RG250 Gamma * RGV250 * RG500 * FXR150 * GSX1100S-SZ, GSX750S-SF & GSX650 Katana * DL 1000 V-Strom * DL 650 V-Strom * Hayabusa * Boulevard S40 * Boulevard S50 * Boulevard S83 * EN 125cc 2a * LS650 Savage * VS 400/600/750/800/1400 Intruder * Cavalcade (85-90) * GV700/GV1200 Madura (85,86 only) * RV 125 Van Van * FR80 - Scooter * FX110 - Scooter * AN Burgman Series - Scooters * Katana AY50 - Scooter * TU250 * GN Series * GZ125 Marauder * GR650 Tempter * Satria * Raider 150 * Crosscage - Fuel Cell hope this was helpfull, Beathalor