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Motorcycle Discussions => Japanese Bikes => Topic started by: huron on March 03, 2010, 02:58:07 PM

Title: Honda cb350k,1973,oil drain plug
Post by: huron on March 03, 2010, 02:58:07 PM

Hello,
I have a little problem with my oil drain plug.It does not want to go back in right.I would like to chase the thread in the case but I cant
figure out the thread?It does not fit to the metric that I have .Does someone know what it is?I have checked metric and Whitworth but they dont match right.The thread is outside diameter 33,5mm or 1 5/16.Does that say something to somebody?
Thanks for the help in advance,
huron

Title: Re: Honda cb350k,1973,oil drain plug
Post by: L.A.B. on March 04, 2010, 08:48:27 PM

Quote from: huron on March 03, 2010, 02:58:07 PM

I have a little problem with my oil drain plug.It does not want to go back in right.I would like to chase the thread in the case but I cant
figure out the thread?It does not fit to the metric that I have .

The thread will certainly be metric if it's original?

And it's very probably a metric fine pitch thread?: http://www.gewinde-normen.de/en/iso-fine-thread.html

Rather than the more usual metric coarse pitch:  http://www.gewinde-normen.de/en/iso-coarse-thread.html