Engine swap with 650/250

[Igor]

Hi!

I am new to this forum, I have been riding a gt125r for more than 2 years now. I know that it is possible to swap a gt250 engine as they are basically the same. But my question is, is it possible to put an engine from gt650r in a gt125r body (or gt125 body)

[Simon]

You can given enough time & good welding/fabrication skills fit pretty much anything to anything but in reality the answer is no even though the 3 bikes share a lot of parts the 650 frame is very different.

[Ken]

Simon wrote:

You can given enough time & good welding/fabrication skills fit pretty much anything to anything but in reality the answer is no even though the 3 bikes share a lot of parts the 650 frame is very different.

Quote

What about swapping a GV650 Transmission with a GT650?

[♠️ MARCEL]

Hello,

Its a nice idea but the 650 will twist the frame even if its reinforced a little,  the  Hyosung GT125/250 frame is even a little weaker than the original GS500 Suzuki frame,  however Korea had no intention of putting the 650 in the frame production wise , so the 650 has its own frame for good reason.

Also they did “try” to put a 600cc (600!) concept engine they made in the GS500 frame, but decided it wasn’t good long term.   Hence  the GS500 was modified with a slight downgrade to just deal with 125 and 250cc , it’s more than enough for it.

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

[Igor]

Do you know if there is any tutorial about the swap, or what I need?

Do I only need engine and carbs or are there more things like some electronics, exhaust maybe?

Thanks! 😀

[♠️ MARCEL]

Sadly no and no one is going to genuinely advise putting a 650 inside the 125/250 chassis , it will destroy the frame. We need you alive sir 🙂

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

[Author]

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