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Ktm lc4 540 conversion to 620 is it possible

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I have a ktm 540 dirt bike I did think it was a 620 but it only has a 95 mm piston how hard would it be to convert up to a 620 as I have a fair few parts from a 620 already thanks.

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Should ask a shop.

But I believe if bottom end is the same , then just a cylinder piston and timing chain.

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I think the stoke is the same as the barrels are the same height side by side

I believe that it should work.

A couple years, you could take a 400 all the way to a 525 & beyond with some machining.

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Yes I took the head off the 540 and it's cracked and have the whole top end off a 620 so it's worth a go and the bike will be better at the end :)

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Yes I took the head off the 540 and it's cracked and have the whole top end off a 620 so it's worth a go and the bike will be better at the end :)

Post up some pics of the how to as you go.

Would be a good thread.

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