So I scored a VIP and rebuilt the top end including a new piston. Replaced the 14/12 with a 15/15, new gear oil, and a bunch of other things. It has a B6 instead if a B5, running at 40:1 with an MLM exhaust. It will start and idle, it takes a bit if work. I have to do the pedal on the center stand thing and ride around my driveway to warm it up. Any ideas as to why this is? All my other mopeds fire right up and idle straight away. Thanks!