***EDIT on 5-28-2016---- I am currently NOT able to make any more plugs at this time. I've been receiving emails about this and apologize for not being able to help you out. BUT!!! If you will read further down the thread you will see that Tools has been producing some tach plugs,so you may give him a shout. Thanks****
I've gotten three emails about these plugs so I decided to make a small batch. These plugs will fit either DOHC or SOHC. They don't have the mushroom-shaped you usually see on a SOHC, but I plan to make a couple of those soon.
They are aluminum. Brushed finished only. The o-ring is just there for a little extra protection since the tach seals are known to weep on some bikes,but it's not there as a replacement for a proper tach seal. These are hollow so you do not have to remove your existing tach drive to install them. Just slip them in and put the retaining bolt back in. Exposed groove is to pull them out with. Fingernails are much less abrasive than pliers.
Two styles:flat and domed. Both are $25 shipped anywhere a flat rate box will take it. Any other shipping will be extra.
Installed in a DOHC.
Installed in a SOHC.