Reply To: New vs old gen Hyosung gt125r
Both GT125R (05-2012) to GT125RC (new shape models circa 2013/2014-2022) are all carb models.
In a nut shell
- Same Engine. Same Speed.
- Newer Model has smaller flywheel & custom made by Korea (it requires specific stators)
- Regulators = Old Gen has smaller & New Reg a bit bigger = For 125cc it is the 2nd annoying electric object after the side stand switch.
- RC = All new harness , not backwards compatible with old gen clocks or old gen harness
- RC = Dash has white face dials and orange LCD/White LCD (Old Gen = Jet Black clocks all over with GREEN Letters)
- RC = Rear Subframe is slimmer, only accepts new gen plastics and new gen seats.
- RC & Old Gen = Both front frames have the same mounting points for headlight cages ( you can use old or new face )
- RC Face = Accepts only diamond shape headlight & has its own brackets to link to the lower panels (doesn’t accept old gen brackets)
- RC Lower Panels vs Old Gen Lower Panels (the big ones hiding the engine) == They are identical
- RC Engine = Slightly slower (82mph indicated brand new)
- Old Gen Engine = Slightly more beefier , Grey Colour, has BIG DADDY style cam tensioners behind each engine = 88 max indicated (78-82 gps- ish…. )
- Old vs RC = Same carbs since 2005
- Same Fuel Pump
- RC = Has weaker KYB Shock. Use old Gen shock. it is much better built.
- Old Gen = Swingarm paint survives a little better but both bikes will love you if you get them a hugger and also get their swingarms powdercoated. Paint wise, the swingarms are the weakest but then again , wettest area on bike too! 🤐
- RC Engine = Does not tolerate bad mods or weak batteries / reg or fouling plugs or carbs = It will refuse to start or take ages cranking… Meticulous thing it is…
- Old Gen Engine = Doesn’t like bad behavior from mechanics you give her to , but it will “try to start” and get you home but will be in a mood the next day.
- Both Engines have 8 valves and they like their clearances checked every 4k miles as per korea or they actually force themselves to drop the overall top speed & they accelerate slower.
- Both are big girls, they like stronger 520 chain kits, less chance of snapping as 428 chains stretch easy (cost cutting for mass produced bike that’s all as a good 520 costs more than 428)
- Again both big girls, make sure clutch is good or pimp out 🙂 (some owners ignore this and 20,000 miles later one of their plates have popped!)