Basic Spark Plug Questions

[rustybronco]

I agree the wire type tool is best for accuracy and ease of use.
Now all we need to agree on is the e-x-a-c-t amount of resistance you should feel as you slip the wire under the electrode.

a slight drag, or about 15-20 grams on a pull type gauge.

[rustybronco]

Can anyone tell me where to find what the recommended gap is for my bike? '82 Suzuki GS650GL. I don't have an owners manual.

30 thou is close enough

So,...how do I set the gap? Do I need special tools?

I used to whack em on the radiator support to close the gap

[scotschult]

I used to whack em on the radiator support to close the gap

I tried to use the radiator support on the GS, but it didn't seem to work for some reason