Vibrations advice – GV125-S Aquila Bobber S EFi

[Carl]

Hi,

I not long ago bought a used GV 125s that had only done 460 miles so still in the running in stage. millage now at 699 it’s had its first service. I have been carefully increasing the revs but when I go above 40 mph there is some vibration through the foot pegs which is normal for some bikes but saw reviews where they said there are no vibrations to speak of.
so I assume it’s still normal though?

[♠️ M77]

It should be fine if a vibration that occurs in sync with the engine’s vtwin growl

But a follow-up question?

• Does it vibrate during idling ? (if its cold and warming up, place your hand on the clutch cover and confirm?
• Also, when its HOT  –> Hold clutch in  and hold clutch out  –> Does it change ?

  Also,  have someone with you for this last test.   Ask them to rev the bike in neutral to about 5-6k revs max

  Do you feel any vibrations coming from either the left side bottom (Stator/Flywheel)    or right side bottom  (clutch drum spinning)

If its had its 1st service , Hyosung mandates that the dealer / mechanic opens the top covers to check clearances (valve clearances) as this is crucial for it  and also  if they can open the clutch cover to check the health of the clutch plates and its Thrust Bearing  (if the Thrust Bearing was funny for whatever reason,  it would change how the clutch works or changing gears through the clutch may induce some vibration  instead of a smooth transition to the next gear)

As you have already experienced riding bikes before the Hyosung, you could make an educated guess/judgement if the clutch feels smooth enough to switch between gears without some kind of vibration or clunking.

I can tell you, if i put a nice exhaust on my GT bike , she roars , moans and shakes  but all healthy for her nontheless.
(Would not advice putting rubbish exhausts on the GV as it WILL run slower and the noise it makes for a good headache on a long ride!)

If one was to make the GV a little louder,  I would just repaint the exhaust to some kind of glossy vht colour then drill the exit hole to a bigger hole, so it makes a growl but enough air stays in the exhaust not to loose power in top gear.  I am digressing though

Keep us posted!

[Carl]

hi,

thanks. will do those checks. I tend to be a bit of a worrier as i’m certainly not a mechanic. it was just on my mind that either the previous owner my have thrashed the engine or that I may not be running the bike in properly. but as I said I do tend to worry and overthink things. lol

thanks again

[♠️ M77]

Carl wrote:

hi, thanks. will do those checks. I tend to be a bit of a worrier as i’m certainly not a mechanic. it was just on my mind that either the previous owner my have thrashed the engine or that I may not be running the bike in properly. but as I said I do tend to worry and overthink things. lol thanks again

Quote

The worry will be appreciated by your iron maiden , I always act OCD around my bikes  ,    don’t be like me who changes oil every 1000 miles   (£40 for a Motul 300V race oil  or  £600-1000 for new engine? I’d rather the oil!)

Stay safe

[Author]

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