It should work.
I have a JRxr2 and I once tried swapping in the JR x'tal with the x'tal mounted on my Futaba Rx. It worked. Besides, I think a JR x'tal is the same as the Futaba x'tal, assuming both radio systems are AM.
On a race once, I had to change x'tals on my JR RX and TX as one of my friends was controlling my car with his Futaba transmitter. Our frequencies were separated by a mere .004 Mh, mine being 26.999 and his, 26.995