You can make it as simple or as complicated as you want, but a big part of it depends on what you plan to re-use from your current setup.
Is your radiator up to par? Will you re-use your current transmission. Will you convert to hydraulic clutch? Will you modify the existing wiring harness or buy a new one? Do you already have EFI, or will you need to modify your existing tank/buy a new one, etc...
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