81 kz750h

bought my first kawa the other week. Paid $400 from the original owner..18k miles. The bike is not bad in my terms but needs some work. The starter relay was off and i was told the bike was hooked up backwards to a set of jumper cables. I was handed a used unknown starter relay and a non running bike. Got it home and put a battery in and got nothing......and i mean nothing anywhere. I started from the starter back with wiring inspecting/cleaning all the connections. There are no turn signals or relays on the bike just the wires. The starter relay is the wrong one or bad so i jumped it and got the bike to turn over. Sounds good but no fire. I got power everywhere i need but coming out of the CDI. Power +and- going in but nothing is coming out of the 4 wires to fire the test light. Before i buy the cdi for $100 i thought i would ask. i am looking at

cgi.ebay.com/ebaymotors/Dynatek-CDI-ECU-...fPartsQ5fAccessories

That Dyna S will replace your system if that is what you want/ need.
Here is some info from the FSM, KZ 4cylinder.

thats what i will go with then. wondering if a 85 gpz750 would be usefull as far as carbs or cam? found one with title for $200, like the exhuast on it but not sure of fit. thanks for your time.

$200 should be a very good deal. Cams will be a bit more power, top end.