how to change the spark plug?

[400Riderex]

what is the fastest way to change the spark plug because on my 400ex it is located in a really ****ty postion, do u have to take off the gas tank and plastics?

[ballisticpb]

the easy way to do it is to use the stock spark plug tool. you can get the tool onto the plug with out removing anything. not too difficult just takes some practice.

[nosliw]

sit down next to the quad. remove boot. put the oem sparkplug tool over the plug. take the oem allenwrench, stick it through the end of the sparkplug tool, break loose. remove allenwrench. keep turning by hand until you can feel it's out of the hole. very simple.

[400EXracer74]

hey does anyone have any extra spark plug wrenches? i lost mine and i cant figure out any other way to do it. i havent tried too hard either though. or does anyone know what size socket it is?

[Chef]

Originally posted by 400EXracer74
hey does anyone have any extra spark plug wrenches? i lost mine and i cant figure out any other way to do it. i havent tried too hard either though. or does anyone know what size socket it is?

Most sockets wont fit...has to be a really thin wall for it to work.

[philly400ex]

I lost my original spark plug socket and found out that if you grind down the wall of a 18mm craftsman socket you can get to the plug rockey mountaian sells a socket just for the 400ex but i had to grind that one also so just get a cheep 18mm deep socket and grind it

[400EXracer74]

thanks that will help a lot.

[crazyelece]

people sell them on ebay all the time

[DaleJrFan]

turn the gas off and stand it up on the rear. you can use a standard spark plug socket sold at any tool store.

Originally posted by DaleJrFan
turn the gas off and stand it up on the rear. you can use a standard spark plug socket sold at any tool store.

Hrmm.. i tried a snap on and a craftsmen and neither workd.. but what did work was my chainsaw spark plug tool.. works great, and even has a allen key head on the top and i can also use a 17mm socket

Jesse

[JOEX]

A 18mm Craftsman works perfect for me, slides right on. I wonder if some 400ex heads are cast different:confused:

[DaleJrFan]

Originally posted by JOEX
A 18mm Craftsman works perfect for me, slides right on. I wonder if some 400ex heads are cast different:confused:

Thats a good question. I have never heard of any one having any problems with changing the plug. I have a couple of buddies riding 400's also so I will call them and see what they use but I use just a regular spark plug socket, the same one I use to change the plugs in my truck.

[hemi operator]

On my '02 only the factory socket will fit. Even that doesn't seem to be a great fit.