I noticed after riding my bike for a while, the lifters/valves seem to get kinda loud. I did adjust them last week, and when I ride, they stay quiet for probably 5 or 6 miles, and the temp stays very cool per the gauge. eventually, the temp will start to rise slightly, still doesn't move much, but the valves get noisy. I also noticed I smell an antifreeze smell and the bike hesitated a LOT under heavy acceleration, but under normal acceleration, it seems to be fine. I am wondering if my temp gauge is accurate. Any way to tell? I did heat it slightly with a torch while I had it out recently, grounded the sender and turned on the switch and the gauge read hot, so I am thinking the sender is working correctly. Any ideas on what my problem could be? (other than a loose nut between the seat and the handlebars)!