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Thanks for the replies. I have to check the jets, but it was LEAN LEAN LEAN when I got it (but did not cut out). I went to the larger jets and it ran pretty much the same but plug has color.  The problem did not exist for some time after the new jets.The problem came after the jet change.

The scooter is running GREAT start, idle, low speed acceleration except for this 48 MPH cutout. Before I'd get to 52 or 53 mph and it just ran out of steam, no cutting out.

I did have an electrical issue that may or may not be related. When I turned the handle bars one way the bike would not crank or start. Some times riding it died. I fixed it. It was piss poor wire routing under the fairing, that cause it to pull the wire harness tight and pull on the connectors when turning handle bars one way. I fixed it, but I need to go check these connections. It is possible I have partial wire issue, where it is not fully open or broken but partial. This partial connection may not give enough juice to the CDI/COIL?

NEW PROBLEM. I tried the replace the CDI to eliminate the CDI as an issue.  It is a 150CC GY6. So I got an aftermarket CDI and it fried (orange one you see on eBay for $8). The first one I ordered was AC CDI... It fried in seconds. I was ignorant of the different types. I determined I have a DC system. I ordered a different more expensive DC CDI, CASOLI "CF250" ($18). It also fried. What am I doing wrong. May be my scooter has different wiring. I saw one youtube video where you have to pull one wire out of the connector on the bike side?