1987 kawasaki k305 no spark rewired put in a yamaha 4 wheeler

Try unplugging the Handle Bar Kill Switch.....Sounds like the CDI is grounded.....Make sure the Pick Up wire from the Engine case is plugged into the wiring harness...This is what triggers the CDI to fire the Spark Plug........

are you getting anything at all?.....you could check your ground wire(s) to make sure they have good contact on the bare frame metal

I have 2002 road star midnight. I lost completely spark on all 4 spark plugs. Before bike was running OK but sometimes on low RPM while idling would skip a firing on a at least one cylinder making spufff like sound. I put new spark plugs, and wiggled a little coil wires. Bike with new spurk plugs would not fire up at all. Checked for spark on all 4 spark plugs - no spark., not even an electrical I lost completely spark on all 4 spark plugs. Before bike was running OK but sometimes on low RPM while idling would skip a firing on a at least one cylinder making spufff like sound. I put new spark plugs, and wiggled a little coil wires. Bike with new spark plugs would not fire up at all. Checked for spark on all 4 spark plugs - no spark., not even an electrical charge going to spark plug. Went back to coils. Each coil (there 2 of them) has 2 spark plug wires and 2 ignition timing signal wires connected to them. I realized that these ignition timing wires contacts are corroded to the point they would not conduct a charge from the distributor to coil. CLEAN ALL THE TIMING WIRES Contacts on the coils. I did that and bike fired up right away and started running much better without sputtering or skipping a cylinder firing. SO DISCONNECT ALL THE COIL WIRES AND BRUSH THE CONTACTS WITH A SMALL METAL WIRE BRUSH.

There are three items that are connected together needed to create spark on your 1997 Honda 4-wheeler, regardless of which model it is.
Before we go through a checklist of these three important parts, look for a black wire with a white stripe that runs to the ignition switch and kill button from the CDI box. Disconnect this wire before it gets to the ignition switch and kill button, then check for spark. The most likely cause is a broken kill switch on the handlebar, or shorted ignition switch. Such a condition grounds this wire and kills the spark.
If this test did not restore the spark, continue reading...
Here is what is required to create a spark.

First, the alternator has one coil which generates a high voltage--about 125 Volts AC for the CDI ignitor box.

Second, there is a pulse voltage generated once every revolution of the engine that goes to the CDI box. This pulse causes the CDI to dump its stored energy from the 125 volt line into the primary of the ignition coil.

Third, If the two connections of the wire that runs from the CDI to the Coil are BOTH SHINY clean, the ignition coil will generate a spark.

If any one of these 3 don't happen, the spark will go away. Of these three, item 3 -- one or two tarnished and/or dirty connectors -- is the most likely cause. Just an added resistance of 0.3 Ohms or more in the CDI to Coil connections will cause the ignition to fail. No other wires have to be this clean.

check your pickup coil?

Rarely will both coils fail. Try disconnecting blk wire with yellow stripe from cdi. Check fire again, if fire is good you !likely have a bad ign switch. If there is still no fire, you will need to test trigger, stater. Also remember the can position senor. Test denser to specs. If cambsenser can't tell cdi where number 1 piston is, there will be no fire. Let me know how it works out for you.

Hi I have a 1986 Yamaha 600 FZ that only spark from plugs 2 and 3. And on plug 1 and 4 I have no spark if I swap the connection from the othe coil pack 1 and four has spark could this be the cdi box going bad. I clean all ground point and connection still te same what could it be?

is there a spark buddy

Go on ebay and buy a new CDI computer those bikes are notorious for computer failure.

If you need further help, I’m available over the phone at https://www.6ya.com/expert/brandon_79b580f5a99c4386

check the carbs float height if to high will keep blowing spark plugs also do the fuel/air mixture screw it will say in the manual e.g 2 1/2 turns out this means screw this screw right in and unscrew the correct amount off turns also make sure your running the correct plug as i have used too cold plugs and have kept blowing try a hotter plugeg br8es <cold br9es<hotter good luck bud