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I did a stock dyno run last saturday before I installed my Thunderbike short pipes. I'm planning on getting another dyno run tomorrow and get an accurate before and after reading. My bike is otherwise stock. I'm pretty skeptical of Thunderbikes claims also but the pipes sure look and sound nice.

Hugh



Which bike? 790 or 865? If it's the 865 i will be awaiting VERY anxiously to see your results. That would be the deciding factor for me in buying them or not, if that is your bike is an 865. I'm right on the fence at the moment because while i've heard form a few 05' SM owners who said the pipes DID make a considerable difference, i don't know what they feel is considerable and if it'll match what would be the minimum acceptable performance boost to me. I'd hate to spend that kind of money just for better sound because for me thats nowhere near worth $700. But that plus a healthy boost in powe rwould be. So please do post your result. It would be a great help to me. Thanks.

On another note, i emailed Tbikes to ask them about any changes they might be doing to develop a different version of the pipes especially for the 05' engine. They told me that they were NOT because they found that engine doesn't respond to pipes the same way and they wouldn't be able to get more out of it by changing the design. They did however say they are about 1/2 way thru testing of some other very simple minor mods they have been working on with the 05 speedy and he said that they are very impressed with the results. he said the engine responds very well with the mods and will be offering them in the future. True or not i dunno. But he said to feel free to spread the word. I can't imaginge what kind of mods these would be because he pretty much insinuated that they aren't major things like bore kits, cams or other major engine work. Maybe the same old pipes but with airbox and/or carb jetting? who knows. but whatever it is i'm dying of curiosity ! I see no reason why they'd be lying about this because if they were they'd only be hurting thier pipe sales by causing people to hold off on buying pipes for thier 05's in anticipation of these new mods.

Last edited by iknowjohnny; 08/19/2005 5:28 PM.