Reply To: Gv 125 top speed
Hey,
The CDI is already at full capacity (no restrictions) , do you have any aftermarket exhausts on it , and if so can you post a pic (this matters a lot)
I would say if the plugs are all yellow, then that’s good! – You can squeeze a little more by:
– Increasing the main jets from stock to 90 and 92.5 as optimal for top gear
– Do the slide mod (click here for tutorial)
Clutch Plates = The service manual says to “Check” (means get the venier calipers out & measure the spring height and plate thickness) for wear as they do go heat fatigued and tired these springs, aswell as friction material of the plates do wear down eventually or the service manual says if “any is out of spec” , rebuild clutch (click here for tutorial)
Chain = Your 520 kit is on the way, so you will find out the hard way how your engine can push it or motor needs attention. You will appreciate the gearing of the 520 will be night & day over the 16 + 52T
16T is too heavy at the front, even for a 428 chain.
Plus , Hyosung slipped up by using cheap plates that warp inside the swingarm if not careful, so click here to compare with the recommended plates that slot inside your swingarm edges and keep the chain stable.
If you’re going to take the wheel off, don’t forget about your cush drive! (see here)
Keep us posted!