421 cub top end or other

[Young Guns Racing]

I currently am running a 4 mil stock cyld aggressive dune port. Well this was great to begin with. After my first dirt drags I want to step up already lol I am looking for something I can run on either pump or race fuel. I already have the 4 mil bottom end and cool head. Let me know what you have. I'm feeling out my options right now so we'll see where I go from here

[nastyracing]

472 cheetah cub powervalves pistons head whole 9 mint . 1200$ just throwing it out there.

[14bansheeboy]

What I have are vito 421cc  68mm ( dune and triple exhaust ported) cylinder, they are really powerful.  

but they need to be replated or resleeved. So I am going to sell it for $125 shipped

 

I also have some WSM heavy duty sleeves (bore sizes range from 64mm to 69mm )that can be used for them cylinders, just make sure you take it to a professional  atv machinc to they can match port as well. The sleeves are brand new

 

I can sell both for $200 shipped

 

pics: http://s1274.photobu...womack/library/