Howdy! I am in need of a complete left-side exhaust system, or any part thereof, for a late Bridgestone 60 Sport. If someone has even a used muffler for a late-style, oil-injected 90 Mountain I would be interested to hear about it (they are not identical - they look almost the same, but the 90 has a larger inlet hole for the larger 90 header pipe). You may phone me @ 918-258-2400. Any help would be greatly appreciated!