Hello Geoffrey and everyone else.
Riding in December does not happen very often in Minnesota, at least if you don't want your bike to rust from the salt on the roads to melt the snow, which is coming down as I type this message.
About 10 years ago we took about a 200 mile ride in late November. I had not ridden in November since I was in the US Army at Ft. Bliss,TX, El Paso, as a Hawk Missile Technician. Rode all year long there. There were a few restricted areas at White Sands Missile Range that they would not let us ride the cycles, but we could drive our car there. And, I had a Top Secret Clearance badge.
When you said CBR300, it brought back memories of the CB350F, 4cyl. that Denise had bought used, while I was working as a Honda Service Mang. It had a leaky cyl base gasket and I listened to the Parts Mang when he said a 400 kit with pistons would be cheaper and work good.
It was a long winter project. One of the big changes was flat top pistons to dome pistons that required to CC the heads for equal compression. Also added a Hooker 4 into 1 exhaust and then also needed HD clutch springs as it would slip, just to name a few changes.
By the time I got it completed, it was faster in a short drag race than 750 Hondas and a 750 Kawi triple. And, it was hard to hold the front end down.
Denise decided to sell it as it was not as fun any longer, unless you were into a fast acceleration each time you started out.