Sorry, I already did it but should have taken a video. Basically you want to remove the points cover, points plate and then the points housing. Then remove the exterior bolt that holds the cam chain tensioner. Then remove the sprocket bolts and pull out the cam shaft. After that you remove the for head cylinder bolts and then there's one more holding down the jug. It's all in the manual. Pretty straightforward as long as your bolts don't strip. Search engine tear down videos for cb125 and you'll find a few.
Love these little bikes.
They're a lot of fun. Here's an article about them that you might enjoy: magazine.cycleworld.com/article/1980/4/1/honda-cb125
awesome can you show how the engine is taken apart? im about to go through an SL125 engine that has a stuck top end
Sorry, I already did it but should have taken a video. Basically you want to remove the points cover, points plate and then the points housing. Then remove the exterior bolt that holds the cam chain tensioner. Then remove the sprocket bolts and pull out the cam shaft. After that you remove the for head cylinder bolts and then there's one more holding down the jug. It's all in the manual. Pretty straightforward as long as your bolts don't strip. Search engine tear down videos for cb125 and you'll find a few.