I recently bought some type of Puch Maxi from my neighbor. I am not sure exactly which one, but I know it is 1.5HP and before the 80s. All I had to do to get it running was clean the carb and and replace the petcock, fuel line, fuel filter, and float needle. A few times when I went to kick start it it wouldn't budge. To fix it I opened it up and manually twisted the flywheel (I think that's what it's called). Then today it happened again but I was unable to turn the flywheel manually. There was no noise when running and it ran perfectly, but seized up after sitting for less than an hour. I am not running lean and only rode for about 15 mins so I doubt that it is overheating. Any suggestions would be appreciated. Thanks!