[glockovets]

hi I tore down my 400ex motor after about 7 years of abuse... everything looked good in the head and overall it was pretty clean. I want to bore it to a 416 kit and get the head ported for more power, does anyone know of a really good builder/shop to take this to? I live in tampa and local is better but i can send it out anywhere if needed. Looking for more overall power from the beast but i heard the 440 bb kits are unrealible... Anyway if anyone has any thoughts or suggestions please post them. Just want to beef her up alot in a semi-inexpensive way. :lifting:

Also going on is: new race frame(old one cracked), +2 jb swinger, g-force adj. axle and currently it has white bros pipe,k&n filter,and front and rear holeshots.

 

[mud99]

You can go with the big boor kit you will need to change the head bolts.

 

[glockovets]

i heard those are really unrealiable tho?? from like 4-5 diff 400ex owners... Anyone kno who "the man" is for port work?

 

[Helmut]

i heard those are really unrealiable tho?? from like 4-5 diff 400ex owners... Anyone kno who "the man" is for port work?

I don't own a 400EX, but I have also heard that the 440 kits are unreliable. I don't know the specifics, but maybe they aren't changing the head bolts.

 

[glockovets]

ok thanks, need port and polish and valve work.... anyone?

 

[TRX2fiveO]

Well I would do it but after my disasteroous mistake with mine (Not the Porting) I would be reluctant to do anyones but mine. I ported my head a few months ago and just got around to putting it on this past weekend. All I can say is it was a mean SOB for about 5 min..lol, but disaster struck. I re installed the valves that came out of it thinking they would be ok boy was I wrong! I lost a head piston and jug because i was to cheap to buy new valves! but it's really not that difficult with the right tools and to do it perfect takes practice and a flow bench with out the bench your basically doing it from feel.

 

[glockovets]

shit so no one knows a shop or a builder that can port and polish my head for me??? please someone must know would like a angle valve job and port etc. let me kno