Finally found a gas tank that fits my 1986 CMX450 Rebel. Brand new in a box with new cap and 2 keys for $99. You can get the on Ebay. The extra capacity gas tank for the 250 which is 3.4 gal. fits perfectly. No retrofitting required whatsoever. YEAH!!!!!!! Found out about it on You Tube. Watched a guy remove the old tank and slip the new one in immediately. Keyed in aftermarket gas tank for CMX 450 to get to it.