hi im wanting to put a s2 gearbox onto a s1 engine but ofc the wires are diff can this be done ?
Unless you swap the whole gearbox/engine wiring loom then no.
Yes your S2 box will bolt and fit straight up to your S1 engine. I have a S1 engine (VN) with a S2 gearbox (VP). The connecters fitted straight into the gearbox with no issues
I have a series 2 engine with a series 1 gear box and they went togeather with no issues.