I had problem with compression on my GW 1200 -84. Cylinder 1,2,3 had 11,5 bar no 4 -9, 8 bar. I dismantled cylinder tob and lapet valve and valvseat. After mounting i have bad running. Timing belt are corekt. The engine are misfiring?? It runs bad on idling. I have don reasembly according too Clymet book without sumerg hydraulic lifters in keroosin/oil??