I have a really nice 1988 Honda CR250 bike I'm going to put up for sale soon. The person I bought the bike from was friends with Steve Simons and Paul Turner. Paul Turner was a Honda factory mechanic and he ran Honda's Quad racing program in the U.S. Turner gave him some (and he gave them to me) really trick factory Honda parts that will fit the CR, but I think they were adapted from his leftover trick TRX parts bin.
Anyone here into the Quad Racing scene back in the 80's? The big bore cylinder is a work of art.