KCvale, looks good. I have the same bike and been getting by with just the rear disk but the side pull sounds like a good idea. Can you post a close up of it? Is the only mounting point the bolt that holds the fender? It’d be nice to be able to put a front brake on without having to buy a new fork. . In the long term in had been thinking about the Monark fork disc brake set up that Venice Motor Bikes sells but I need to unload the 3 bikes in my garage first.
I have been running a 66cc Grubee Super Rat with about 50 miles on and have the same SBP shift kit set up as you. Yes, it is very sweet.
So far it handles the engine with no problem. I am running a SBP expansion pipe that I modified with a DIY larger muffler that I am still tweaking. I used stainless steel scrubbing pads as a baffle material but I might switch to fiberglass. I am trying to go as quiet as possible. The muffler was really simple to make with components are off the shelf and fit like they were made for this mod. I will be posting a how-to when I get the sound right. Hopefully next week…if it ever stops raining.