Reply To: Bike died but restarted. – GT125
The green wire from the 250 CDI only works if the 250cc (not 125cc) has 2-wire neutral sensor.
All 125cc have a single wire neutral sensor. So their mod was just wasted cut wire and a placebo effect. Better coils and ignition system like caps / plugs will do a far better job than a CDI cheat (which is really not worth the trouble)
The green wire on the CDI goes straight to the Neutral Sensor Plug
That’s why your 125cc has 2 wires on the neutral sensor plug from the harness , but the ENGINE SENSOR itself has 1 wire coming out of it.
So don’t worry about it.
if the EGR/AIS has been blanked on the engine side, then check under the airbox has been blanked too incase last owner forgot.
Hyosung did away with the ON/OFF Taps on the Comet 125 because owners always left the taps on , and their engines eventually seized to constantly having flooded engines or their carb floats eventually got jammed open as the big tank of fuel is awalys trying to rush through it (incase the pump failed too).
Later Naked 125GT had vacuum taps , and GTR Carby always had it its too awkward to turn the tap off under the fairings , so vacuum tap was installed from the get go. Honestly, the Korea taps work as they should but commonly fail a lot, that’s why i never stock them on the shop.
YZF vs GT = Light frame, it is able to run away quick. A tuned hyo will race past it beyond 88mph indicated (which is the true old gen grey engines did factory) this assumes bike is factory mint and under 1000 miles run in. Old age, neglect of previous owners, bad fuel (eg. E10) , etc will make it run poor. But discussion for another day haha. For now let’s revamp your entire bike to is last nook and cranny down to the engine tappets etc (clearances and compression) will be the last major thing to do (can’t be avoided) , 8 valves it has (most 125 only have 2 or 4 and a single piston)