Reply To: GV125C Tuning frustration
Congrats on your test! Stay in the hyo family lol. Keep the 125 for winter or short runs as i own one myself for just that or as a work horse sometimes (if car isn’t being used haha) , but keep an eye for a GT650 or GV650 🙂
On your GV125C – Few pointers if it helps;
- Float height 7mm sitting down (means float is gently resting on the needle) , 17mm lifted up… But 8mm is a generally a max limit when the carb is sitting on its diaphragm covers.
- Tank Tap = Check OFF means OFF (Disconnect the hose safely and ensure the tap still doesn’t leak out fuel when its in OFF mode)
- Change Floats = If in doubt about them
- Change “Needle Seat” and “Float Needles” , these 2 are literally the only items that will stop the fuel coming in after the floats have risen (extra fuel will just overflow to cylinder overnight sometimes) – Hence “float jamming” being a common thing on carb motorcycles , it just means we have to extra be serious with them (unlike injectors lol)
140 psi via a flexi hose should be OK to make it “start” at minimum, the hard metal pipe is pushed down as we crank the engine or it shoots at you!😉 (Just make sure the metal bit uses a Spear Shape rubber tip.