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trx400exat00
12-03-2005, 08:53 PM
is a fmf power core 4 repackable?? could i do it?? how do u do it?? if it needs repacked would it mess with my 400ex top end rpms or top end speed?

rmz250
12-03-2005, 09:33 PM
The powachitter? I repacked one of those things before. Those pipes SUCK!

trx400exat00
12-04-2005, 08:05 PM
so would a hmf pipe be better? ill start saving up soo i can sell mine on ebay lol

ONEBAD400
12-04-2005, 08:15 PM
its not that hard i just took the end cap off and pushed it full of packing didnt see a difference in power but the whole pipe getsloose a lot and i have to tighten it almost after every ridedoes yours do this

trx400exat00
12-04-2005, 08:27 PM
noo but do u think this is a good pipe with okay gains in torque and speed?

ONEBAD400
12-04-2005, 09:06 PM
Its okay but the fmf powerbomb headers help a whole lot on bottomend and top

trx400exat00
12-05-2005, 01:58 PM
did u have to rejet urs and did u move the needle, if soo how do u move it?? and where exactly is the air screw?? and how do u know if its right?