I've been working on tuning my Minarelli, and the max I've managed to top out at is 35 mph. I feel like I should be doing better than that by now. Here is my setup:
Dellorto 15.15, #60 jet
1977mopeds 15mm intake
Port matching on the intake (my first porting)
11 tooth front sprocket
Ignition timing: 50 degrees before TDC
I've tried different jetting and different ignition timing and can't get an improvement with either. I plan to do some real porting at some point but I thought I would get faster than this without that. The acceleration is pretty good, not amazing at low end but really good midrange. The only things I can think, is that I need to double check my compression. What should it be? I haven't looked at my clutch, I dunno if maybe its slipping still at full speed? Or my points are worn out so thats why the timing needs to be so advanced?