400ex trun into a 440???????????

[scarface2949]

besides sleeve hotcams piston and gaskets what else is mandetory 4 turning a 400 into a 440
(exaust filter jetting valve springs)????

[coryatver]

heavy duty head studs

[prepracing]

its not mandatory, but if you don't port & polish the head you will not see the full performance gains a 440 can give:macho

[04'400ex'er]

I would put a heavy duty rod in also. but that requires splitting the cases and $$$. You will really need a full exhaust, a K&N filter would compliment it nicely, no valve springs for the hotcam because it is a drop in cam. HD head studs arent mandatory but you could be regretting it if you dont put them in. A port and polish is by no means manditory, but would compliment it nicely.

[trxkruzoffman]

probly a heavy duty clutch too

[QuadJunkies]

Originally posted by trxkruzoffman
probly a heavy duty clutch too not needed IMO. Peolpe will vary on this one ,but I personally dont run one in mine nor do I run a dif Rod. We just compltely rebuilt my mtoor from the ground up and hads no issues and we had alot of hours on my quad .;) I also run the same rockers. I was told by my previous builder that the stock ones are considered Hard faced. I just replaced with new stock ones after two years just becuase it was already opened up ,and they still werent that bad .

[QuadJunkies]

Originally posted by 04'400ex'er
I You will really need a full exhaust, a K&N filter would compliment it nicely, no valve springs for the hotcam because it is a drop in cam. Agreed! :)

[SHADETREE101]

quadjunkies your builder is the first bulider i agree with

[QuadJunkies]

Im sure having all these things are great to buy ,but its just not fully nessecary

I also ended up having installed the Duncan PC4000 so I havent had issues like some with the head bolts. I did have some wear on my Clutch basket, but the funny thing was its wasnt until AFTER I installed the Barnettt Clutch lol :p So I went back to stock.