HEADS UP!!!

Site upgrade in progress... Core site functions are working, but some non-critical features/functions will be temporarily unavailable while we work to restore them over the next couple of weeks.

Please post any bugs you encounter, but before you do, check to see if it's already listed.

Thanks for your patience while we work to improve the community.

Sign in to follow this  
Followers 0
toofast2

Damn spark plug removal!

12 posts in this topic

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:

Share this post


Link to post
Share on other sites

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:

Share this post


Link to post
Share on other sites

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.

Share this post


Link to post
Share on other sites

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.

Share this post


Link to post
Share on other sites
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.

Share this post


Link to post
Share on other sites

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.

Share this post


Link to post
Share on other sites
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.

Share this post


Link to post
Share on other sites

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:

Share this post


Link to post
Share on other sites

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

Share this post


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

Share this post


Link to post
Share on other sites

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.

Share this post


Link to post
Share on other sites
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.

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!


Register a new account

Sign in

Already have an account? Sign in here.


Sign In Now
Sign in to follow this  
Followers 0