Interesting to see people have problems with 428 chain, in my experience they are as bullet proof as cr125 transmission:) Few suggestions, works for me. In the beginning of the season buy 3 chains. I then grind the pin on a side of the link to set desired length. The reason for 3 chains is to have 3 different length chains for different gear combinations. Once I have the 3 chains set to length I never use the chain breaker, I use “master” links to get chains off and on. 428 chains last a season for me. Lube a few times a day.