Damn spark plug removal!

2006 YZ450F:OK,I know how to remove the damn thing:crazy: but the problem is the cap/boot itself,there doesn't seem to be enough room to lift the cap off(looks like it hits frame/gas tank):smirk: can you remove/lift up cap to access the plug without removing tank:confused: as it seems to me

I can't seem to move the cap out of the way:confused: THX and please,no

commentary from the "peanut gallery":moon:

Peanut Gallery response:

agreed it can be a PITA.....did mine last week. One word of caution....I did everything to keep water out of here when washing bike with plugging holes etc....and the spark plug base was just covered in rust. Make sure once you loosen the plug a couple of turns that you take some contact cleaner /Brake/Carb cleaner and flush out the debree before removing the plug - otherwise you will have a lot of debree fall into the head.:smirk:

I always remove the gastank, it takes some patience to remove and put the cap back on but it will fit, you have to bend it to clear frame- push it down on securely:thumbsup:

You have to bend/twist the cap a lot harder than you think is necessary. You will feel like you are going to break it in half. A PITA for sure.

I've never had an issue with it. Pull off the gas tank, unplug the wire to it, then pull the cap/coil up out just behind where the frame spars meet. You don't really need to bend it at all.

I've never had an issue with it. Pull off the gas tank, unplug the wire to it, then pull the cap/coil up out just behind where the frame spars meet. You don't really need to bend it at all.

+1

You have to unplug it so the the terminal can be rotated to the rear. The the coil can be tilted (not bent) back some to clear.

Trick: Liquid Wrench Silicone Spray or equivalent. Pull cap off the plug and out of the valve cover, spray outer and inner surfaces, remove excess. Improvement to removal and replacement of the cap is amazing, and long lasting.

Peanut Gallery response:

agreed it can be a PITA.....did mine last week. One word of caution....I did everything to keep water out of here when washing bike with plugging holes etc....and the spark plug base was just covered in rust. Make sure once you loosen the plug a couple of turns that you take some contact cleaner /Brake/Carb cleaner and flush out the debree before removing the plug - otherwise you will have a lot of debree fall into the head.:smirk:

I always remove the gastank, it takes some patience to remove and put the cap back on but it will fit, you have to bend it to clear frame- push it down on securely:thumbsup:

Also once you have the Cap/coil pulled out.......Use some compressed air and shoot it into the bleed hole on the side of the head..this gets any dirt and debris out also before removing the plug.

Thanks guys,so it seems that you have to remove tank,remove connector to

boot/coil,rotate,and pull:crazy: I can't believe yamaha:foul: to remove a

STINKIN' Spark Plug:thumbsdn:

Fortunately, plug removal on a 4S is extremely infrequent, maybe once a year.

Fortunately, plug removal on a 4S is extremely infrequent, maybe once a year.
Exactly. I don't get the whining. :smirk:

The only time this becomes a real problem is if you foul out your plug when your about to head to the start line. Usually never happens, but if it does things can turn into a panic in the pits. Thats why I always head to staging early.. just so these things don't cause me to miss a moto.

The only time this becomes a real problem is if you foul out your plug when your about to head to the start line. Usually never happens, ...
It's even less likely with a 450 than a 426 because of the upgrades to the ignition.

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