building either 416 or 426 ex to race and trail ride?

[ranger400ex1994]

well i was goign to build a 440 kit but that does cost alot more then just a 416 or a 426. i plan on MX racing next summer and i do alot of trail rideing also is there that much of a power difference between a 416 or a 426? i was planing on putting a stage either 1 o2 hot cam in them and that was about it and i think 11:1 compression. and i hope i could run pumped gas in it but if i can't i can't. also i would really like to beat my friends 440ex its has 11:1 compression with a web cam. if you got some ideas for me to be able to do that with a smaller CC motor i would love to hear them. looking for the thing to be reliable to. i am leaning more towards the 426 but i will not over look the 416.

[ranger400ex1994]

also what about heating i don't want to be overheating all the time so i was going to get some scoops and see if that works. got any ideas

Originally posted by ranger400ex1994
well i was goign to build a 440 kit but that does cost alot more then just a 416 or a 426. i plan on MX racing next summer and i do alot of trail rideing also is there that much of a power difference between a 416 or a 426? i was planing on putting a stage either 1 o2 hot cam in them and that was about it and i think 11:1 compression. and i hope i could run pumped gas in it but if i can't i can't. also i would really like to beat my friends 440ex its has 11:1 compression with a web cam. if you got some ideas for me to be able to do that with a smaller CC motor i would love to hear them. looking for the thing to be reliable to. i am leaning more towards the 426 but i will not over look the 416.

my cousin had that with a duncna double barrel pipe, and it was fast, reliable too, he had a 416 and people thought it was a 460 if i keep my 400 this y ear im getting stage 2 cam and lrd or hetrick or dmc exhaust to go with my piston