SV650.org - SV650 & Gladius 650 Forum - View Single Post - OK, so what is causing this oddness? Running a bit funny.

NedSVS · 21-06-09, 08:33 AM

Does it stop missing / stuttering if you wind it open from this midrange throttle position? It may have become too rich because of emulsion tube (needle jet) wear but the motor will handle a rich mixture better under load. I checked my emulsion tubes for wear by making pins from suitable size steel wire and filing / polishing the end to an elongated oval shape accurately measured with a micrometer. I found they were about 0.075mm (0.003") out of round at 32000 miles (almost half of which was done with Factory Pro stage 2 needles).

21-06-09, 08:33 AM	#8
NedSVS Member Join Date: Mar 2005 Posts: 572	Re: OK, so what is causing this oddness? Does it stop missing / stuttering if you wind it open from this midrange throttle position? It may have become too rich because of emulsion tube (needle jet) wear but the motor will handle a rich mixture better under load. I checked my emulsion tubes for wear by making pins from suitable size steel wire and filing / polishing the end to an elongated oval shape accurately measured with a micrometer. I found they were about 0.075mm (0.003") out of round at 32000 miles (almost half of which was done with Factory Pro stage 2 needles).