how far to bore on a carb?

[speedy400]

Hi, I'm getting a 416 kit very soon. I will have a je piston and I will end up with a 11:1 ratio, I have a UNI filter, dyno jet kit,open lid usually, slip on and soon to be powerbomb header also. I will also be doing minor porting and polishing. How far should I bore out my carb to? Also for a 416 how much over bore do I need to go from stock sleeve? thanks a lot-darren

[flyin#5]

if it was me id bore my carb roughly 2-3 feet.:huh :blah:

[chad502ex]

Originally posted by speedy400
Hi, I'm getting a 416 kit very soon. I will have a je piston and I will end up with a 11:1 ratio, I have a UNI filter, dyno jet kit,open lid usually, slip on and soon to be powerbomb header also. I will also be doing minor porting and polishing. How far should I bore out my carb to? Also for a 416 how much over bore do I need to go from stock sleeve? thanks a lot-darren

speedy, u can buy a crf450f fcr carb for $300 which is way better than boring stock 400ex carb, imo... :)

chad502ex.com

[Varmit57]

Where did you find a FCR for $300?

The cheapest I found was $350 for a used one that needed a cable! I was to late anyway.

[speedy400]

Originally posted by Varmit57
Where did you find a FCR for $300?

The cheapest I found was $350 for a used one that needed a cable! I was to late anyway.
you can get them at service honda, I've checked them out, but for the time being, I dont have the money,so 20 bucks from my local shop sounds better to me. but back to the original 2 questions.:confused: -darren

[Dave400ex]

I believe most carb mods they bore it to a 38mm.