Here I try to repair my Honda UMK431 brushcutter. I bought this brushcutter a while back and had planned to actually swap the complete engine with a spare GX31 engine from a tiller that I have. Yet I feel tempted to instead repair the original engine.
I replaced the piston and pistonrings and I honed the cylinder in an earlier repair. Yet I still experience low compression and even have overpressure in the crankcase. So lets open up and grind the valveseating and see if this improves compression.
You will allso see mee apply liquid gasket and do a valve timing adjustment. let's see if it will run better.

Please help me by giving feedback/commenting regarding the repair but also regarding the video, any suggestion is welcome.
off course are you welcome to subscribe! I plan to add more video's on all sorts of DIY projects!