393 big bore, what carb???

[blkstangman88]

so im waiting for my 393 parts to come in along with my race cam and i have no idea what carb i should have or jet sizing. i ordered the 393 kit with a 10.5 to 1 piston if it matters. any help is great

[atctim]

ok - lets start by telling us what machine this is>?>?>?>?>?>?>?

[aproudcanadian]

pretty sure he is talking about a 350x, maybe a 400ex carb or 450r?

[TatTooL23]

if u r doing this to a 350X then i would say the 400ex carb would be perfect. i know in stock form the 400ex carb can be a little too much because it has an accelerator pump. but being that it is a 393 now with a race cam i would think it would be perfect. please let me know how it goes if u do a 400ex carb cuz i wanna do the exact same things to my 350X. u can get a brand new 400ex carb on ebay for pretty cheap. they advertise it as a 350x performance carb.

[blkstangman88]

Oh one minor detail lol yes im doing this to my 85 350x. so a 400ex carb or a 450r carb. which jets would b prefered??

[Cuztom Racing]

I would go with a 35 or 37mm FCR. Im going with a 39mm FCR on my 492cc, 350x build. FCR carbs are AWESOME!

[blkstangman88]

whered u find a 492 kit!!???

[Cuztom Racing]

Guy out of AZ sells the kit.

[NOS_350X]

If you look at my posts on 3wheeler.org i have a carb review somehwere on there,

400ex is good but a FCR off a 250cc dirtibke is the way to go.

A 450 carb is oging to be too much.

[blkstangman88]

what size? 36mm? 39mm? i dont know the sizing so bare with me

[Cuztom Racing]

33mm is stock so 36mm would be good. All the motors back in the day were under carbed.