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View Full Version : Spark plug wrench size for 400ex


Pur Pony
11-09-2001, 07:32 PM
What size socket do I need to remove my spark plug on my 400? Im guessing its metric.. and I dont have a deep socket to fit it- im going to buy one tomorrow.
Foxrage
11-09-2001, 07:43 PM
Try your tools that came with the 4 wheeler...
Pur Pony
11-09-2001, 07:48 PM
I would- but I bought it used and it didnt come with one :(
EX 80
11-09-2001, 09:18 PM
It won't come out with a regular tool, you need the stock plug tool or motion pro makes one i think.
Warrioreater400ex
11-10-2001, 12:06 AM
o goodness...... i had the EXACT same problem.... mine was used and didnt come with one. we tried ALLLL kinda metric deep-well thinwall sockets.... the only way to do it is the lil tool that comes with it... i just went to the local honda shop and they gave us one that they use. but its still a pain in the butt to get it out.
Glamis400ex
11-10-2001, 10:14 PM
it's 14mm


Glamis400ex
11-11-2001, 09:52 AM
no,it's 17mm..pretty sure about it ...14's too small..also i lost my tool kit long ago..the 17mm socket just need to be worked in slowly and it will work
Glamis400ex
11-11-2001, 08:34 PM
LRD TRX250R,

My bad, if I gave wrong info.....thought it was a 14mm, someone should clear this up though...

Glamis
400exJOE
11-11-2001, 09:27 PM
its 17 or 18. I forget. I know its real tight though. I spray the outside of the socket before i put it on the plug. Because of the overhead valves, the plug is real deep in there and the socket gets stuck on the engine.
11-11-2001, 09:40 PM
i usually greese or spray my socket before i do it too...also blow out the plug area with compressed air before you remove your plug cause it catches alot of poop dowb in the spark plug well area
timewass
07-02-2002, 09:03 AM
It's actually an 18mm.
Click here for an OEM tool list with prices (http://216.37.204.203/honda_OEM/HondaATV.asp?Type=13&A=74&B=45)