Really sputters at high revs now

[KTMAndy]

Originally Posted by motopsycho87

So far replaced

coil
stator coil
cdi (rm125, got same, so switched back for good measure)
piston (wossner)

Random question. Which stator did you get and where did you get it from?

My bike has been having the same symptoms as yours. I thought it was the carb jetting. But after 4 hours of carb in carb out etc. My friend came over and suggested it wasn't the carb as it was back firing through the air box suggesting it would be an electrical fault.

5 mins later stator off and it was clear 1 coil was hanging loose off its spline 4 others where black and floating loose inside there wrap.

But I can't find a replacement stator other than the oem part at just under ?400 for a 2005 bike it's a bit rich.

[motopsycho87]

The cure was,

New HT coil and new CDI. Looks like the new HT I'd fitted was buggered from the get go!