Reply To: 05 GT250R Quality of life/Must have upgrade/replacements/mods?
Hey & welcome!
Honestly , the sky is the limit but off my brain , this what i could say in my opinion (all are important), and whatever else not mentioned is considered “upgrades” to your desires.
Valve Clearances
Piston De-carbon
Stator Unit (if not in OEM spec)
Regulator (first electric object) (don’t cheap out on aliexpress trash)
Tyres = OEM ones are suicide bricks in the rain
Brake Lines = Goodridge Stainless
Brake Fluid
Brake Pads = EBC Sintered Metal
Headlight Bulbs (old ones go yellow and get less bright) = OSRAM NightBreakers are great halogens (We’re not allowed HID’s in UK or LED bulbs)
HID’s too fussy of a job. LED’s make me want to throw spanner at the right (too bright & glaring but does not travel far enough) Halogen wins for now. Unless Hyosung makes a headlight out of LED’s & road legal like Audi R8
Carb Overhaul = (whatever is in it , ie fresh jets , fresh slides (diaphragms) , good clean up
Manifold Intake Pipe Rubber O-Rings
Air Filter
Spark Plugs = Stay stock CR8E or LASER ones. IX-Iridium are rubbish.
NGK Spark Plug caps = too important as OEM caps crack a lot & leak sparks out!
Motul 7100 or 300V oil (or Silkolene Pro 4 Oil) = Recommended oils.
Oil Filter
To make it last longer, i change oil every 1,000 miles = Bottles are cheap but a replacement engine isn’t, call me OCD lol.
X-Ring chain is good, stick with JT or Japanese brands = You WILL snap with chinese chains.
Sprockets = stick with JT or SunStar Japan = All other brand sprockets are just rubbish, they slowly chew up the front engine shaft!
However PRO-X , Renthal are trusted sprocket brands too.