Great modification to do to your bike. I built my Kx450f with these cams and I could not have been happier with them!
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Stage 2 ITR: Dual cam engine. Intake and exhaust cams sold separately. Good midrange and top-end increase. Cam uses stock auto-decompression mechanism. Uses stock valve springs.
For sure get a factory service manual to help you time the cams properly and set the correct valve clearances.
You may need a EFI tuner when you are done installing them. We would suggest to ride the bike after installation and see how it runs before making your purchase.