Hey I need to no befor I buy what do I need to change to put a 4k in my ke30

Can I use the 3k gear box on 4k motor

And are all of the wires the same

So what do I need to change ??

Everything is identical, the only slight differences is the 4K engine might have emissions crap on the carby. A lot of guys ill use the 3K carby as it doesnt have it.

However when i had the 3k carby on my 4k it was woefully slow and something was wrong. I suggest putting the 4k jets into the 3k carby.