Mines are from a 250r geometry made to accept the ktm sx450 engine, not it is back with 250r engine mounts and still be a 250r geometry, a-arms and swing arm. Linkage of a crf450 2004 instead of 1991 cr500 linkage like most of others 250r aftermarket geometry. I had some problems finding parts for all my stuff, prp are close, a guy who was building with them or for them is now the one to get new parts for those build, but he is to busy to proceed an orther even if he have all the parts.