I can answer you Marty ( Since I had them made ) 
They are modeled exactly after the OEM Tri-Z Oil Plug.
Long story short, I had to purchase a couple of these, and when I got my brand new OEM ones, they had cracks in the paddle part of the plug, and I was a little upset. So, I talked to the Yamaha distributor to send me a replacement that wasn't cracked, only to get an exact copy again, WITH CRACKS!
Fast forward a few weeks, I had these made in Red, White, Black and Yellow without said cracks. I figure if I can make them better than Yamaha, why not add a little color into them! I imaging if you are interested in one in some other color, let me know and I can see what I can get.
I listed them in the 3WW store if you are interested....
http://shop.3wheelerworld.com/index....product_id=337
Shout Out to John AGAIN for the promo.
Gunter glieben glauchen globen
The Good:
1985 1/2 Tri-Z - Daily Rider - Pretty much stock ( wink )
1985 1/2 Tri-Z - Custom Black & Gold, Top mount plastic tank, custom 3D printed airbox, Banshee shock
1985 Tri-Z - Rider restore in process
The Bad:
1988 TRX250R with 86 ATC 250R Motor and Swinger - Screamer!
The Ugly:
1993-ish Banshee / 2003 Motor by VSR in Belding, MI - Duner Fun!!
2000-ish Banshee / Motor by RDZ Racing in Fowlerville, MI - Another Duner!