How to test a dirtbike spark plug?

Question

My klx 125 wont start and i need to test the spark plug.how do i do it?

Answer 1

take the spark plug out, keep the wire on the plug like normal and try starting your bike. watch the plug to see if you see a spark...

Answer 2

Take the plug out. Put the plug back into the wire. Touch the plug to the engine and crank the motor, by either the starter or the kick start. You won't see a spark unless you ground the plug.

Answer 3

There is no practical way to test a plug. a plug that fires outside an engine may misfire under compression or under load. If it works good with a new properly gapped plug the old one was bad. Some motorcycles like one brand of plug better than another

Answer 4

Some part stores sell a test light. It plugs in the spark plug boot and a wire connects to ground (engine). It will light up if there is spark. A lil bit safer way to test.

Answer 5

The kawasaki's are a weird breed. The only way to test them is holding your tounge on the tip of the plug while you, are a buddy cranks the engine a few times. It should be a very, very, slight tingle. This indicates that it is putting out about 12.0 volts per milla second. If you have this I would say look at the fuel system.

Answer 6

pull the plug wire off plug and put thin metal object in end of wire set it on a metal part of bike (Note set it up so it hold itself or you will be shocked) then start engine and look for a spark to jump from metal object to metal part of bike. (Cross Tip screwdriver works real good for this test

Answer 7

Rich has the right Idea, about the plug. But just buy a new one, honey. They don't cost that much. If that wasn't it, you'll only be out a couple of bucks.