Help/Input Needed - 2002 Speed Triple 955i Stumle/Hesitation Below 3k RPM...
Alright.. I've done some searching on this forum and on Triumph Rat for a resolution to my issue... and while I've got some helpful tips, nothing has fixed the issue yet. I've got a 2002 Triumph Speed Triple 955i that is completely stock with the exception of a K&N air filter that I picked up for free, but it came with issues. The issue is, when applying anything more than 1/4-1/3 throttle below 3k rpm's I get a hard stumble/ hesitation until it gets above 3k rpm's... this can be from a take off or while cruising down the road. It will also die if you do one or two low rpm rev's in neutral or with the clutch in. Engine temp is not a factor, so I've ruled out tight valves. I've replaced the coils and fuel pump with known good, used units, installed new spark plugs and a new air filter, done the 12 minute tune, reset the TPS through TuneECU and verified the fuel tank was venting properly. I have a completely disassembled 2003 Speed Triple that I am parting out, which I've been stealing parts from, but I'm not sure where to go from here.... any suggestions would be greatly appreciated.