The bench is 61HP I think. Dyno readings seem to be all over the board on this stuff. You loose at minimum 10-15% putting it to the rear wheel so I think you are not really that far out. Available torgue (forward push) is the key. If the torgue line stays relatively consistent with the HP line you are good to go. You also have to look at the air fuel mixture at the diferent RPM checkpoints. Back pressure and the lack of it on louder pipes can really mess with the lower end of torgue and increase it at wide open throttle.
Do a search on dyno in the board and you will find many that have posted their results with similar setups. The tech vault also has references to this.
Many on this board are getting good HP at high end but its all over the place on its way up. In my humble opinion that is air fuel mixture.
In normal riding, you don't drive wide open throttle all day so the real question is if it is zippy enough for you. If so, the HP to the asphalt is incidental.
