I have a 94 vn750A. The PO put V&H's on it but didn't take care of the backfiring issue. I spoke with Dynojet who informed me that a carb kit is not available for this model. He went on to say that if I plug the vacuum house on the left side of the bike coming off the airbox it would solve my issue and make the bike perform better. Problem is, I'm new at this and don't know what to look for. Any help is much appreciated.