Confused af. Help us . This is for my buddys build. He's got a 4 mill crank and bought a what we were told was a ss cub. But then were told it was a 4 mill cub. N he just bought a new ss crank after we found out they may actually be a 4 mill cub. #s on bottom of intake ports are 407 on one side 385 written on other. Here's pics. Help out please. see the 385 scratched in by hand. This one is the 407 appears to be stamped.
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again for the record it ain't my fuckin bike, already have the ss cub in hand, and with CPI inframes you won't be able to tell its a cub by just lining up with it
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