Uprated Japanese 520 Chain & Sprocket Kit :: Hyosung GT125R GT250R GT125 GT250

(4 customer reviews)



  • Tired of poor standard chains?
  • Slower acceleration?
  • Sprockets are worn too soon?

Fear not, this 520 Conversion Jap Chain & Sprocket Kit is just the fix for all 125s needing a boost & Tour Ready!
& for the 250 Twins benefiting from extra longevity over Korean/Chinese chains. 👌


⬇️ Full Details below!

⚡Uprated Japanese 520 Chain & Sprocket Kit :: GT GTR 125 250 RC Hyosung

Uprated Japanese  520 chain & sprocket kit – Want to go faster ?

Based on “various customer feedback” online & social media, this chain & sprocket kit always gave the 125/250cc bikes the extra zip! 🏁 

📑 Product Details  [What’s Inside?] :

⚙ 1x Yamaha front sprocket
⛓1x Light Japanese 520 Chain
(From RK | EK | Choho Jap | DC )
⚙ 1x 520 Rear Sprocket 
(TC | AFAM France | or JT)
🔗1x Genuine ‘Hyosung’ Sprocket Washer
(Safety Lock Tab)
🔩 Free Stainless Sprocket Bolts! 
(Stay shiny!)


🔵 Product Gains (This kit vs Stock Chains):
  • From 125cc to 250cc this 520 kit will max the bike at 90 100mph @12k revs max.   …#confirmed
  • Acceleration is increased.  …Better 0-60 times ✔
  • Uphill^ rides are much faster.   …#guaranteed👍
  • Stock GT125 averages 81-84mph (you will get to top speed quicker & over 86+)
  • For 250cc owners – Acceleration is up marginally & best gains is the chain lifespan over stock Korean/China chains.
    & 98-105mph an absolute max  (for you track day junkies!)
    & For Normal Street Riding =
    Japan Steel chains always last better than cheap china copies.
  • Great for Touring.  520s outlive 428s & inspires distance riding

💬  FAQ: What colours can I get ?
Chains = Black / Charcoal   |  Rear Sprockets = Shiny Silver

💬 FAQ: Can I get a   Gold   Colour Chain?
Contact us for more info, they cost a little extra from the UK Trade Suppliers.

🗣  OK, What are they saying about this Chain & Sprocket Kit ?:

Head to the UK  Hyosung Facebook Group (& search “520 Chain Kit” in the group)
You will find various feedback of our customers who fitted the kits.  More reviews will appear on this website too! 👍

The price already includes tracked & mandatory express delivery due to item weight & contents inside.  We use UPS or DPD couriers.
🚚Please allow 3-4 Working Days for UK Orders 

🔧 Fitting Instructions:
None.  Just swap & go ;-).  Literally.

Need detailed help?  Visit the Forums

🏍 125cc Model fitment list:

GT125R & GT125-RC
All years.
GT125 Naked & GT125P
All years.

📧 For other bikes, browse the shop or  please let us know…

4 reviews for Uprated Japanese 520 Chain & Sprocket Kit :: Hyosung GT125R GT250R GT125 GT250

  1. shane (verified owner)

    Made a improvement to my 125 got abit more top end aswell

  2. Mick (verified owner)

    Fantastic pieces of kit cheers marcel they work a treat

  3. Jason (verified owner)

    Once again amazing service and delivery they look good too

  4. Daryn (verified owner)

    Instant gains from this kit amazing worth every penny

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