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TIME FOR AN UPGRADE


94Denger

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Hey all, looking for recommendations as my banshee ate a chunk of intake this last summer. Looking to go bigger but i also want to be faster than my friends who are both sporting 421's, what i'm looking for is your guys opinion should I: build a 421 on race gas, a pump gas 472 or trench my case and go big 10mm or so. 

Cheers

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Pretty much all stock, stock mikunis, vforce 4's, ported and polished, cylinders are oversized cant remember by how much, head's shaved still on pump, running sb cpi's. I did go to a billet clutch basket but that was a number of years ago now. Basically going to need: carbs, crank, pistons, cylinders, head, probably trans work and potentially pipe.

I'm basically looking for peoples opinion on whether or not the 472 will be good forever and I wont want to tear into it again in 5 years or should I just go to the 10mm and let my wallet suffer. 

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1 hour ago, 94Denger said:

One rides a cub on pump gas but he's probably 80lbs lighter than me, the other is my weight but on a race gas cub. Last i checked the pump gas bike was around 90hp and the race gas bike was 110?

You’ll be building a cub then. 443 or 465 cc. You can go with a 5 mil crank and not have to trench. Your about to spend a boat load of cash so be ready...

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Dune riding only, machine hasn't touched dirt trails in 20 years. I do like to hit the race hill a fair amount but the machine has to be duneable. I am aware that i'm probably going to have to blow a good chunk of change on this build but it's a sentimental rig so its worth it to me.

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