I have a parallel import (Belgium)VTR Firestorm (99). After taking the\ntank off to change the plugs myself I found to black plastic discs in\nthe 2x carbs on what appears to be a butterfly design. My question is\nthis has the bikes hp been limited and do they normally get imported\nto the UK this way ? The performance of the bike is fairly sharp where\nit will pull 60 mph in about 4 secs from a standing stop. I am\nbewildered as the discs only have about an eighth of them removed\nwhere this surely would mean there is less performance than this if\nthey are limiters.\n\nI appreciated any suggestions.