sparkplugs

[smp]

I just got new NGK plugs, the direct replacements listed in the manual.
Do I need to regap these?

I did a search and I found some info on plugs and I saw people talking about the coil?
Do I need to do anything else, or just swap out the plugs?
Thanks

[ScottWV]

I think generally you always need to regap, or at the least check the gap to ensure it's correct.

[BadDSM]

What are the factory spark plug gap recommendations?
Thanks in advance,
Evan

[glenn9171]

According to my Hayne's manual, it's 0.8 - 0.9mm.

[smp]

Well, I put the plugs in and the bike runs fine.
But.. I didn't measure or anything, I don't have a tool.
I'm guessing you need a tool, how do you check the gap?
How do you regap?

[gsJack]

Well, I put the plugs in and the bike runs fine.
But.. I didn't measure or anything, I don't have a tool.
I'm guessing you need a tool, how do you check the gap?
How do you regap?

GS500's take a NGK DPR8EA9 or 4929(new no. system,same plug).  Gap is .035" or .8-.9mm.

It's best to check them, but it's been a long time since I received a new one that wasn't proper gap.  If there already in and it runs fine I wouldn't bother to pull them to check.

To change the gap you bend the electrode sticking out on the end of the plug.  Pick up a plug checking and gaping tool when you get a chance.

[BadDSM]

Thanks for the info I just got my gs500 and have not gotten hold of a manual yet.
Off topic but how do you tell what setting your rear shock/spring is set at?
I want to increase the setting and have the factory tool but dont knwo where to start.
Thanks,
Evan

[gsJack]

Thanks for the info I just got my gs500 and have not gotten hold of a manual yet.
Off topic but how do you tell what setting your rear shock/spring is set at?
I want to increase the setting and have the factory tool but dont knwo where to start.
Thanks,
Evan

There are 7 numbers and they come set in middle at 4.  Turn towards 7 to increase preload and towards 1 to decrease it.  Looking under from the left side you will see the number it's set at in the middle of the shock.  Doesn't seem to be a index mark.  They can be very hard to turn with the tool.  Some have had better luck setting it with a large screwdriver.

[glenn9171]

You can get a spark plug gapping gauge at any auto parts store for about a dollar or so.  Depending on the style you get.  I have the disk shaped style and it was about $.75.