Originally Posted by Wallrat
That will probably be too long. Mine is 118mm long and I can just barely clear the frame to slide it in.
Just for peoples information, over here in the UK Honda want a small fortune for a spark plug tool.
So I had a trawl through e Bay, and found a universal tool which did both 16 mm and the required 18 mm for approx £5.00
or $7.50 US?
Anyhow, I measured the depth required so as to clear the frame by putting a zip tye down to the bottom of the tunnel (past the spark plug hex's) and simply cut the 16 mm off to the required length, I finished it off with a hole through both sides to take a screw driver blade or small bar,and hey presto a functional tool for a fraction of OE prices.
Hope this is of some use to someone.