Description
⚙️ 520 Upgrade Chain & Sprocket Kit (Conversion) :: Hyosung GV125 Aquila
🚚 4-5 DAYS DELIVERY GV125 Carby Chain & Sprocket Kit
Hyosung GV125’s now benefit from a custom & complete 428-to-520 conversion chain & sprocket kit!
Put simply this…
You will have more top end over any stock 428 kit. #guaranteed
You will accelerate better in low gears #guaranteed.
520 kits outlive all stock 428 chains, so it’s great for Distance Touring!
📦 Product Details (Full Bundle Kit):
⚙ Yamaha Front Sprocket From AFAM EU / SUNSTAR / or Yamaha OEM |
⛓ GOLD 520 Jap Chain From RK | EK | DID | etc |
⚙ 520 Rear Sprocket Silver or Black [random] see gallery above ^ 📷 |
🔧 Genuine Hyosung Washer | 🔧 Genuine Sprocket Nut | 🔩 4x Stainless bolts #freebies |
🏁 This 520 Kit Vs Stock 428 Setup
🏁 Accelerate to 70mph faster than stock 428s. #Guaranteed. For Hyosung GV125 this 520 chain & sprocket kit |
🛣 Top Speed is a max of 85-89mph (Need Proof ?) Stock sprockets on GV125s top out around 73mph ish at most! |
⚙ Lower Revs in all gears. Want to cruise all day? |
🌄 Tour Ready! Ride long distance with less adjustments |
⚙ Cruise in lower gear Shorter rides are better too! |
🏍 Exclusive to GV125 Carb Models (1998-2018) & Gold looks good! 👌 |
🎬 VIDEO SHOWCASE
Credits to @John.P!
Youtube = https://youtu.be/doJCjcBhwUQ
🚚 UK DELIVERY TIME :
This is a big special kit that will take 4-5 working days to arrive to you (via UPS/DPD)
👍 Hyosung Model |
✔ Fitting Instructions |
📦 Product Colours |
GV125 Aquila only (2001 – 2018✔) GV125 Carb Models Only. |
None. Just swap & go #Literally. |
Rear Sprocket is Silver or Black (random) Chain => Gold. |
❌ IT WILL NOT FIT 2019 – 2023 MODELS
( It has a totally different engine & chassis that’s why. )
(So if you have an INJECTED EFi Bobber GV125-S Hyosung, you must click this link here (tap here) , we have a kit for those bikes.)
Need more detailed help? Visit the Forums! or send an email if you prefer to!
Ref OEM # = 27510H41732 | 27510H41721 | 27600HG5150
David (verified owner) –
Just had this fitted big difference good deleviery aswel
Luke –
This was my major upgrade on my GV125. I can’t recommend this enough. Has greatly improved the performance, especially up hills.
Moustache Man (verified owner) –
Took out the 125 for a test spin and wow i am absolutely amazed.
I’m amazed at the rev range that it now provides, i can cruise at 2500rpm doing 30mph in gear 5, it actually hits 60mph in gear 3 which is crazy! I can cruise at 70mph at 8000-8500 revs, whilst beforehand I would only be able to just hit 70 at max revs, around 10500 to 11,000rpm. This means i can safely commute to work with the bike running at 7000rpm doing about 60 to 65mph which is fast and means the engine is under a lot less stress!!
Those gains are insane, however, the top speed is even more impressive. I was under the impression that the sprocket kit wouldn’t add power, but just shift the power band instead. Which is actually kinda correct. With the stock bike, I only managed to hit 70, barely 71mph.
With the new kit installed, I managed to hit 80mph today on a motorway. That’s insane! So fast for a 125cc!
Thanks for your amazing customer service, keeping me updated throughout my delivery
And thank you for the sprocket kit, it has sure made me happy this christmas. The bike is wonderful, and the acceleration too omg! It’s crazy! It gets to 0-60 in no time
Absolutely wonderful, would highly recommend this modification, so cheap and the chain is a lovely golden colour. Plus the chain seems a lot thicker than the stock one, so it’ll definitely take a couple thousand more miles than the stock one. I love it!
Joe Banks (verified owner) –
Upgraded the chain and sprockets on my GV 125 c, to the 520 chain, and what a difference it makes. From pulling away for the first time after fitting the differene was clear. Smoother and faster transference of power to the back wheel through the gears and fourth really does feel like fifth.
Really happy with this feels like a new bike. Cheers Marcel 😛
Joe Banks (verified owner) –
I have to agree to pretty much all Moustache Man has to say. Not had the chance to hit the motorway yet but was running up hill at 55 in fourth. Previously would have been struggling to sit on 50 uphill, I am bigger than average so it is to the bikes credit that it manages this :p.
Oliver (verified owner) –
After reading the reviews and speaking to Marcel I decided on getting this kit and I’m glad I did. Great quality parts and I have noticed a change in performance. I can now get 90mph out of it, which is crazy for a 125 cruser! It will comfortably ride at 70 all day and acceleration has improved to for safely getting away from idiot drivers haha! Would highly recommend
roy (verified owner) –
the 520 kit does actually work it changes your gear shifting altogether 5th is more like a 6th gear
i have had 70mph out of my aquila gv125 2008 reg and im around 18.5 stone.
of course i in my last review did not think much of the kit but i was in the wrong ( FOR THAT IM TRULY SORRY)
MY CARBS WERE AT FAULT
standard main jets are supposed to be both 87.5 ……………………….MINE WERE 82.5 BOTH
standard pilot jets are supposed to be both 15…………………………..MINE WERE 17.5 BOTH
so after doing the upgrade mentioned on here main jets front 90 and rear 92.5 MAIN JETS
and PILOT JETS 15 and 2 1/2 turns out with the mixture screws PLUS balancing the carbs .
fitting irridium plugs
fitting upgraded ngk plug caps found on here
my bike has gone from doing 55-60 at a push slowly………….TO A VERY FAST PICK UP AND 70MPH AND BELIEVE ME WHEN I SAY ITS FAST ENOUGH….
LASTS WORD GOES OUT TO MARCEL FOREST HE IS TRULY A GOOD GUY .
Balazs Wittman –
I just installed the kit and it’s amazing!
Feels smoother
And I gotta do more upgrades by roys review!
I feel like slowly making this bike better and better
Customer help is also 5*
You guys really helped me out with all! Thank you!