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I intalled TW6-6 and had the bike dyno tuned...not happy....no bottom end...couldn't get the bike moving.....went to the 255's and it was ten times better.....I didn't need to rev it hirgher......it was already moving so fast by the time it got to where the TW6-6's were starting to pull.....I didn't need any more pull...if you want a bike that revs like a japanese bike then you should probably buy one...
Call fuel moto i went with the 777 on my 107 kit the 777 made a few more horsepower dont thjnk you can go wrong with either one and cannot go wrong with fuel moto they have excellent customer serv
what exhaust do you have with your 107 kit? I was thinking about doing 107 with 777 but I have a side dump exhaust