don't let the top dead center scare you . Seen valve lash adjusted fine without going through the tedious TDC routine, just make absolutely sure cam lobe is in the most downward position , lifter will be a the lowest height in the lifter body, put the bike in a stand raise the rear wheel , get the bike in 5Th gear, pull the plugs use the rear tire to adjust came position setting. correct push rod cover makes live a lot easier for your adjustment. use a close pin to hold up cover during adjustment.