In the Spring of 1978 when I was 17, I started work as a mechanic at a motorcycle shop. My first demo bike was an orange H2. I was was stopped 3x in three days by the cops, mostly out of curiosity as I was never ticketed. That thing was a gas. Given what was out there in 1978, it didn't seem all bad. At least it had a disc brake.
What was weird was the day we sold it, the shop owner came back and said, "I sold the
H2. Put this 4.60x18 knobby on the back."
"Huh, are you SURE?"
"Yeah, just do it. I'll explain later."
As a good employee, I put that tire on, helped the guy load the bike into his truck, and off he went.
After the bike was gone, I asked what the deal was. My boss said that people held "field meets," that they they drag raced these things in the grass.
Good luck. With a Yokohama ribbed front tire,
getting that thing slowed down would have been interesting.
I never saw that H2 again, but the image is still fresh in my mind. It just SO weird to see an H2 with a knobby tire.