How to check if you have updated cam tensioner on older 125|250 Twins

[♠️ MARCEL]

Let’s face it.   No one likes to take out their engines to change cam tensioners if they hear bad rattling sounds etc coming from it.

This guide is very easy to check if Hyosung Korea put an updated cam tensioner on your bikes during 2007 to 2018  (or stupid previous owners used the faulty batches too)

Do not worry , this is a very easy process (I hope!), this applies to these bikes only

• 2007-2018 models of GT125 Naked | GT125R  | GV125C Aquila  | GV250 EFi | GT250 EFi | GT250RC EFi

Open the top cover of your engine  (Rear and Front) and get a very bright torch as it will be dark inside the engine!

 

After that, go near the engine and look inside:

 

After you look inside on both engine heads , please note the picture below and my notes:

• If you have a “FLAT TIP” , take your bike to your dealer and change it immediately, it will cause a LOT of issues. Hyosung also stopped making these faulty batches of tensioners because they have very bad springs.  It cannot be repaired
• If you have a “CURVY/ DOME” shape tip, then you will be ok. You can ignore this topic
• Remember this, do not use “manual tensioners” , it is a stupid idea on a street motorcycle that 99% of riders will not bother adjusting all the time and you will need serious experience to know if the chain is too tight or too loose,  and if you get it wrong, YOU WILL LOSE THE ENGINE CRANK!
  When i fix customer motorcycle’s , I get very annoyed when garages put rubbish tensioners and they cause customers to have seized engines later.  A new crank is a very expensive fix!
• If you hear any noise  from any automatic tensioner from Korea -> Just replace it and check valve clearances too and chain health!

 

 

Also, you can get new tensioners from your local hyosung dealer / mechanic with included bolts and o rings

• Make sure, your new tensioner has a new bolt, or you can use your old one
• But please make sure to always use the ORing also or  you will get bad oil leaks
• Do not adjust it, because it is not adjustable,  it is “automatic one-way” type of tensioner
• Only use tensioner that is correct for your model of Hyosung 125|25 vtwin. Do not use other tensioners or you will get big problems later.
• If you have problems finding a cam tensioner , please click here to send an email with your address and bike details , i will order one for you!

 

If you (or your mechanic) want to replace it, also make sure to use a NEW gasket.

• If you need OEM one, we can get one for you  (just send us an email)
  or
  You can make gasket yourself out of “Automotive Gasket Paper”.   Cereal boxes are not recommended unless it is emergency , so please do not ask me about Cereal Box tricks. I have never used cereal boxes to make gaskets , i always find a genuine one or make one out of properly made Automotive Gasket Paper.
  “Each to their own as they say!” but i digress.    Moving on ……….

 

If you live in a remote destination that has very few garages or your mechanic refuses to fix a Hyosung motorcycle , I would highly advise you to use a service manual and watch a lot of Youtube Videos on how to change cam tensioners on vtwins such as SV1000, or similar vtwins.
This is an area that does not allow a faint heart or a single mistake will cost you a new engine! It is serious.

I will find some “time” to make a nice tutorial on how to change tensioners and check clearances but i think Korea did a very good job explaining the step-by-step guide on their service manuals for specific models of Hyosung.  Use a manual that matches your motorcycle too!

Ride safe!

If you have questions about other issues on the bike , please Post a New Topic too!

PS. yes , i know , the rear engine is the least fun part!

 

 

 

 

 

// Meditation doesn't mean you have to sit still....

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