This was spotted on e-bay recently
http://www.ebay.co.uk/itm/Yamaha-RD350LC2-1UA-YPVS-RD350-Cylinders-Barrells-Top-End-CRMC-RACE-PORTED-/321211960452?pt=UK_Motorcycle_Parts_13&hash=item4ac9b98c84&nma=true&si=jnlKf23vbnTmrmbZnVlEC5X6gs0%253D&orig_cvip=true&rt=nc&_trksid=p2047675.l2557
I thought Walter Kaaden was a two stroke tuning genius but the chimpanzee with a dremel who did this obviously thought he knew better..