Is an ATC200 Top End same as XR200?

Guys, will an ATC200s Top End work on an XR200?

What's different if anything?

Other engine parts? Trans gears? Crank? CDI (at the top of the engine)?

Thanks for the help.

If I'm right you will have to bore the engine out .5 as the ATC is 65 and the XR is 65.5 or use a ATC piston.

I swapped an ATC185S head onto my TLR200. Rocker arms are slightly different and the compression release as well. A 200s head may be a match for an XR though. If the rockers are the same you could swap in the decomp mechanism.

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