a reply for fastbansheekid, it is just something that happens every so often, when assembling the motor, sometimes everything just fits together perfectly and with a good break in, the motor could be noticeably faster, i have had my quad dynoed to see what was going on, i changed everything back to stock(even jetting) and it registered about 1.5 hp more than 2 other stock 400exs they tested, lucky me

 

How much hp did it dyno with the pipe and stuff on it??

 

ever try ducktape?lol try it is worx if ur planning on getting wet

 

i havent dynoed my quad with all the mods yet, if i do, i will put it on