Almost done...
It still needs the exhaust header painted, a speedometer put on, the throttle kill button hooked up and some zip-ties but it's functionally done.
My mechanic lives ~15 miles away and has been testing it to and from work this week.
I ended up cutting off the stock exhaust header just after the bend, then cutting an NON-EPA 2-stroke just right to match them.
Best I could get was a couple crummy tacks on it, but enough to run it around the corner to Jim's welding and they did a nice job.
Joe wore a pair of baggy nylon shorts the kids these days wear one day and a leg fluttered into the exhaust.
That's OK, I am painting the whole header pipe part black, but what a mess, that nylon just melts right one.
The Q-matic was a real pain.
In order for the Q-matic to fit the 79cc's head angle Quenton drills new mounting holes that lower the back of the case.
So low that it is past the bottom of the engine.
I used a 49cc 4G base, and to raise the engine up from it I used 2 strips of 1" square stock between the base and engine, and longer engine mount bolts.
Another issue was the stock belt and pulley.
We couldn't keep the pulley from moving out until we put washers on the shaft to the pulley and an end cab bolt.
The belt was toast in no time.
It was hitting the tensioner arm bolt.
I picked up a replacement belt a tad thinner at CARQUEST around the corner for $5 and all is good now.
Another issue with these builds is the throttle.
The engine has a manual throttle with governor and carb has noting but a tab, not even a return spring.
I stripped all that away and fashioned a metal strip with a hole and notch for the throttle cable, made a mount point for the throttle cable stop, and screwed it to the throttle tab, and put in a return spring.
This is tricky.
You have to get the metal tab at a 90 to the throttle tab the exact right length so full throttle on twist gives you full throttle on the carb, and it comes back to idle.
Works good though.
You have the full range of throttle control.
We know it does over 40mph easily on those 29" tires, how much over (Joe thinks 50) we will know when I put a speedo on it today.
I don't particularly care for builds like this.
For the hobbyist with the right tools and parts a rewarding ride,
but for me a money loosing time consuming pain in the butt build.