Difference between 1990 and 2004 engine ignition.

[dB-tje]

My question is about the ignition of a 1990 vs a 2004 GS500 engine (the 2004 has a different ignition rotor)
Can a 2004 engine run on 1990 electronics? Or what do i need to make it work?
I'm planing to buy a 2007 engine with 1992 stage 3 jetted carbs for my 1990 gs500.

[adidasguy]

Motors are the same.
Put old timing pickup and rotor on new engine and it will run.
You should swap carb boots, too. And when you do, put new o-rings in them.
New motor does not have tach cable output. You will need to get a newer electronic tach. When you get it, we can help you connect it up.
Don't toss the newer rotor and timing pickup - many of us here stockpile spare parts.
Your old motor probably can be parted out.


...I see - if the engine already has the carbs on it, then ignore part about swapping carb boots.