Topic: CB400F Valve Lash

[TRPLE]

This weekend I was going to set the valves on my 400F, but I realized that I do not have the right tools.  On my old 500K all I needed was a 10mm wrench and a flat screwdriver.  The 400F seems to take a 9mm wrench and some sort of tiny square driver?  I don't know how to describe this drive well enough to find the right tool without taking the tappet out of hte engine, and I hate to do that.  Can anyone tell me what this tool is or where to get one?

 - Matt

[Jay B]

There's a Honda tool for that, but I don't have one. I use a combination wrech on the locknut and a pair of needlenose pliers to hold while tightening. It might take a couple of tries but you can get it.

[supersport_CB400F]

I made my own tool for holding the adjuster.

[malcolmgb]

hey biffta, what did you start from for your special tool?

[supersport_CB400F]

It’s made from steel sheet about 2.5mm thick, cut, bent, drilled and filed and it works great!

[TRPLE]

Is there a commercially available tool that does this task?  For that matter, does anyone know the part number for the Honda tool?  I'm not opposed to seeing if I can get one.  I hate the idea of possibly rounding these tiny tappet adjusters off using alternate methods.

 - Matt

[bryanj]

There are, as i remember, three diferent valves tools and i think you can get all of them from Dennis Kirk

[Gordon]

I always just used needle nose pliers like Jay B said.  You don't have to apply much force to the tappet adjuster to hold it in place while tightening the lock-nut, so rounding it off isn't much of a worry.