I think that the quiet pipe is something that we will need to get use to riding with and tuning around. I did run my stock WR muffler open and loud for a little while and loved the power, but eventually I would need to pass sound check somewhere. I made an insert for it and imediatly the bottem end started hurting for power. I've done a bit of tweaking to the jetting (thank you TT:thumbsup: ) and my power is back and so is 90% of the response. A few leak jet changes should fix that also. IMO jetting is your issue.