How do I get these engine bolts off??

[gary55]

This is my first build, and I bought this engine second hand off craigslist. The guy said that it had never been run, but I'm wondering how I get these head bolts off. It's an upgraded head, but how did he even get it on there?View attachment 75508 View attachment 75509 View attachment 75510

That engine is so spotless that I don't think age is a issue. Pull the plug, check the compression, hold the outside of the plug against the head and turn the engine over while looking for spark, if these are good and you have good fuel flow to the carb. then you may need to adjust the needle hight in the carb. The CNS carbs. can be temperamental. One question. Was the engine that clean when you bought it or have you done something to get it that clean before you put it in the bike?